CATIA has many naming conventions and packaging options. In this post, we’ll be looking specifically at CATIA V5, with future posts examining CATIA V6 and 3DEXPERIENCE.

Version 5 began back in the late 90s as a complete re-write of the previous version. As development progressed, new releases were produced. A release indicates enhanced or new functionality over prior releases – however, still on the same version. A collection of bug fixes would be referred to s Service Pack, and specific bug fixes are referred to as a Hot Fix. Putting it all together we would see something like:

V5 R19 SP 9 HF 108

This would translate to:
Version CATIA 5, release 19, service pack 9, hot fix 108

Why is this important? Because many OEMs require their suppliers to deliver designs that specifically match their own.

Classic vs. PLM Express

When looking for a seat of CATIA, you would be looking for what Dassault calls a configuration. Configurations are commonly referred to by their trigram (a character letter acronym) that is specific to the type of design required. For instance, a mechanical designer would be interested in either an “MD1” or “MD2” – “Mechanical Design 1” or “Mechanical Design 2,” respectively – depending on level of complexity. We call these configurations Classic.

Later, to support their data management solution, SmarTeam, Dassault came up with new bundles called “CATIA PLM Express.” These bundles included licenses for SmarTeam, encouraging use by lowering the cost of entry. This also the first time we see the idea of roles. Rather than bundling functionality by the type of design, in CATIA PLM Express, the bundles are made more intuitive by considering the role of the designer. You could get these bundles, or modules, specific to Manufacturing Engineers, or Layout Engineers. The idea is to gather the modules required by the desired outcome (lathe machined parts, structural steel frames), rather than the methodology (mechanical design). You can build your own PLM Express here.

cat-1074657_1280There are a few additional terms to define when working with PLM Express. It all starts with the bundle called “CATIA TEAM PLM,” or in trigram speak “CAT,” which includes most of the basic design tools and some data management licenses. This is the base configuration upon which everything else is built.

The next level of bundles are called Enablers. Enablers form the starting point of the role-based package. A designer that needs to produce structural steel frames would start their selection in the “Layout Engineer” group of enablers, and would select the one named “CATIA Structure & Steelwork Layout,” or “SSE.” A tooling engineer would look at the group “Mechanical Product Engineer,” and the enabler of choice would be “CATIA Jigs & Tooling Creation,” or “JTE.” In the tooling example, the common way of referring to the package is “CAT+JTE.”

If enablers start the specialization bundles, the next level called Extensions round out. These bundles are very specific to a role or outcome. Case in point is “CATIA Composites Design,” or “CPX.” Another example would be “CATIA Electrical Cable Layout,” or “ECX” found in the “Layout Engineer” grouping, and could be added to the enabler “CATIA Layout & Annotations,” or “LOE.” That would create the final package of “CAT+LOE+ECX.”

A special note: in order to get access to an extension bundle, an enabler bundle must accompany it. In turn, to access an enabler, you must first start with CAT. Think of them as levels of a house: CAT, the base configuration, would be the first floor. The second floor consists of enablers, and the third floor are enablers. You can’t get to the third floor without the second. You can have any combination of enablers and extensions, regardless of the role grouping. So our tooling designer (CAT+JTE), may, for some reason, need access to the Electrical Cable Layout extension (ECX), found in the “Layout Engineer” grouping.

One final note, and this is a biggie.

When an OEM specifies a version level, say V5 R22 SP5 HF 16, they may also prescribe a classic configuration like MD2. This is not gospel. You may use a PLM Express bundle instead; both use the same file formats. They are both V5, and are interchangeable.

This can be extremely confusing, especially for new people just entering the CATIA world, and all these trigrams and bundles can be daunting. Our team can help you determine what you need and put together the bundle that makes the most sense for your situation. Just let us know how we can be of service.

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Composites always had a well-defined place in the aerospace industry because of their properties: lightweight to make overall design lighter and toughness to make overall design bear the aero structural loads. At present, from aircraft fairing to train noses, boat hulls and wind turbines, composites offer dramatic opportunities to meet increasing cost-driven market requirements and environmental concerns. However, modeling of composites in a seamless collaborative environment has always been a challenge. This is because of multiple aspects of composites modeling such as design, simulation, and manufacturing that made it quite a tough task on a single platform.

CATIA composites workbench now offers a solution to address various aspects of composites modeling in a unified manner. The objective of this blog post is to provide information on composites workbench capabilities with respect to design, simulation, and manufacturability of composites.

DESIGN IN ANALYSIS CONTEXT

There are different ways to start the preliminary design of a composite part, but the zone-based design is ideal to capture analysis constraints and predict the behavior of the part inside the design environment by importing thickness laws. The thickness laws are calculated as a result of FEA analysis. The composites part design workbench in CATIA provides easy-to-use dedicated zone creation and modification features. Zone-based modeling contributes to significant time savings with the ability to perform concurrent engineering with mating parts. The image below shows a wing panel with a grid created from ribs and spars in assembly context and thickness law for each cell mapped on the grid from a spreadsheet.

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Once the grid information is ready, Composites workbench provides highly productive automatic ply generation from zone capabilities with automatic management of the ply staggering and stacking rules. The ability to quickly and automatically transition from zones to plies while keeping full associativity, allows the designer to focus on the design intent and helps dramatically reduce the number of geometrical tasks required to design the part.

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To further check the viability of a design from the structural strength perspective, it is possible to perform the FEA simulation within the CATIA environment using the Elifini solver of CATIA analysis. The full associativity with composites workbench is maintained and true fiber angles are taken into account. To address the non-linear aspect of FEA, is it possible to export the plies data in the form of layup files to Abaqus CAE using the composites fiber modeler plug-in. In case design modifications are needed, it is possible to edit and modify any ply or sequence in the composites workbench and instantly export the modified layup file to simulation workbench or Abaqus CAE for validation. Thus designers and analysts can work together in collaboration during the composites development process, saving time, improving product quality, and preventing costly error. […]

Autodesk Vault offers a basic environment for change management that is more flexible and useful for more situations than people realize. The change management interface in Vault appears at first glance to only include a single rigid workflow for change, but upon further investigation you will find that it can be used more broadly.  Let’s take a look:

  1. ECR, ECO, ECN – The Vault change management environment is called “Change Order List,” but that is really misleading.  Different templates can be created for many purposes and these could include Change Request (ECR), Change Order (ECO), and Change Notice (ECN) to name just a few examples.  If using more that one type in your environment, it is common to use prefixes of ECR, ECO, etc. for each template type.
  2. Release management – The change environment can be used as a formal release mechanism as well.  This might be helpful if you want multiple people to review and approve work before it is initially released.  This gives you a location to capture everyone’s comments and thoughts related to the initial release.  A template with a REL prefix is often used for this.
  3. Simple changes – The flowchart for the change environment makes it look like it must be relatively complex, but there are options to shortcut many of the steps for those with the appropriate authority.  The “submit and force approval” and “fast track approval” make it much quicker to transact and capture simple changes.
  4. Complex changes – More complex changes will often use all the steps in the default workflow, and may even go through multiple iterative loops.  This can be done by simply rejecting the approval and re-opening the change.
  5. Simple or complex with the same basic workflow – There is only one formal workflow with the various options built in.  This can be used in many scenarios, and often with different people involved (based on the change template used).  Each change template can have a different routing.  The routing determines which people are responsible for each step in the workflow.
  6. Role of the change administrator – The change administrator is responsible for determining what happens when changes are in the “Open” state. This means someone else could create a change, but the change admin acts as the gatekeeper and determines if the change is really going to be made by submitting it to have work actually done. This means change requests, change orders, approvals, and notification can really all happen as part of the same workflow if you want to keep things simple.

change-order-status

Previously, my colleague Mark Van DeBogert touched in an earlier blog post on the business side of CATIA 3D Master. Today, we are going to go a little further into understanding what is available to purchase from the Dassault CATIA V5 product line. As with a lot of Dassault CATIA products, there are two levels of the Functional Tolerancing & Annotation offering.  The licenses are FT1 and FTA respectively.

The FT1 license allows you to easily create your 3D annotations, tolerances, and specifications, as it does provide a pretty comprehensive set of dress up features, text and flag note features. 3D Dimensioning can be done in both part and assembly levels.  You display and manage your annotations by simply setting up various annotation planes, and you can easily switch a mirrored annotation with the click of a button, as shown below.

The number one and most significant difference between FT1 and FTA is the Tolerancing Advisor.  The advisor guides the user through the creation of annotations and dimensions according to the selected geometrical element, plus an existing annotation and the selected standard (ANSI, ASME, ISO, etc.) the user is working to. For the novice user, it will usually prevent making gross mistakes; it’s pretty much the all-purpose tool for creating annotations, dimensions, and tolerances – it can’t necessarily do everything, but it certainly goes a long way. Everything created using the tolerance advisor is what’s referred to as Semantic.

In order for something to be Semantic it needs to meet two criteria: […]

256px-caught_between_a_rock_and_a_hard_placeThere they were, sailing along their merry way. Toward the horizon, a narrow strait approaches. As the boat gets closer, they notice a couple of strange characteristics; to one side a cliff and the other a whirlpool. Upon arrival, it becomes apparent that this is the cliff where the monster Scylla dwells. Looking to the other side, the monster Charybdis, spewing out huge amounts of water, causing deadly whirlpools. Each monster is close enough that to avoid one means meeting the other. Determined to get through, our intrepid hero Ulysses must make a decision.  The idiom “Between Scylla and Charybdis” comes from this story.  In more modern terms, we would translate this to “the lesser of two evils.”

PLM administrators, engineering managers, and IT teams are often give this same choice with equally deadly – well, unfortunate – outcomes. What is this dilemma? Customize the PLM system (beyond mere configuration) to match company policies and processes, or change the culture to bend to the limitations posed by “out of the box” configurations.

Companies will often say something to the effect of “We need the system to do X.” To which many vendors meekly reply “Well, it can’t exactly do X, but it’s close.” So what is a decisionmaker to do? Trust that their organization can adapt? Risking lost productivity and possibly mutiny? Or respond by asking “What will it take to get it to do X?” incurring the risk of additional cost and implementation time.
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We can further elaborate on the risks of each.  When initially developing the customizations, there is the risk of what I call “vision mismatch.”  To the best ability, X is described with a full understanding of the bigger picture that is missed when the developer writes up the specification.  This leads to multiple revisions of the code and frustrations on both sides of the table.  Then, customizations have the longer-term risk of “locking” into a specific version.  While gaining the benefits of keeping your processes perfectly intact, the system is stuck in time unless the customizations are upgraded in parallel.  Some companies will avoid that by never upgrading…until their hardware, operating systems, or underlying software systems become unsupported and obsolete. Then the whole thing can come to a crashing halt.  Hope the backups work!

office-1209640_1280However, not customizing has its own risks. What if the new PLM system is replacing an older “homegrown” system that automated some processes that the new system cannot? (And a “homegrown” system comes with its own set of risks; original coder leaves the company, never commented code, no specifications, etc.)  For example, raising an issue automatically created an engineering change request while starting a CAPA process. The company has gained a manual process, thus exposing them to human error. Or, perhaps the company has policy that requires change orders go through a “four-eyes” approval process, to which the new system has no mechanism to support such a use case.

Customizing is akin to Charybdis, whom Ulysses avoided, deciding that it is better to knowingly lose a few crew members rather than risk losing the entire ship to the whirlpools. Not customizing  is more like Scylla, where there is lower risk, though a much higher probability to the point of almost certainty.

We’ve been through these straits and lived.  We’ve gone through with many companies, from large multi-nationals to the proverbial “ma and pa” shops.  Let us help you navigate the dangers with our PLM Analytics benchmark.

The Dassault Systèmes SIMULIA portfolio releases new versions of its software products every year, and this year is no different. The first release of Abaqus 2017 is now available for download at the media download portal. SIMULIA has developed and broadcast 2017 release webinars to make users aware of new features available in the 2017 release, but those webinars are long recordings ranging from one to two hours each, which can be daunting. This blog post will provide a brief highlight of materials and explicit updates in Abaqus solver 2017. A more detailed explanation of any mentioned update, or answers to further questions, can be obtained either by listening to the webinar recordings at the SIMULIA 3DExperience user community portal, leaving a comment on this post, or contacting us.

SPH boundary conditions improvements

SPH particles located on opposite sides of a surface cannot interact with each other in the absence of boundary condition. This was not the case in previous releases; in Abaqus 2017, this is the default boundary condition setting. There are further improvements in tensile instability control to prevent instability among particles subjected to local tensile stresses. Below is an example in which there are SPH particles in two different chambers; the lower chamber particles are subjected to displacement BC while upper chamber particles are not subjected to any BC.

DEM improvements

  1. The series and parallel search algorithms for contact are unified to improve the DEM performance. The search cells are created only once.
  2. It is now possible to run DEM jobs with particle generators in parallel mode. This means more than one particle generator can be active while a DEM job is running.
  3. In previous releases, only fixed time increment scheme was available and it was difficult for the user to predict the appropriate time increment. In the 2017 release, an automatic time increment scheme has been introduced.
  4. Adhesive particle mixing is now supported. The algorithm used is called JKR adhesive inter particle contact. Both Hertz contact and friction are supported.

Material Enhancements

  1. There is some good news for users in the health care industry who design and manufacture cardiovascular stents: Super-elasticity, which was previously a part of user subroutines, is now available in the Abaqus 2017 material library. The motivation is Nitinol, a nickel titanium alloy used in cardiovascular stents because of super elasticity, shape memory effect, biocompatibility, and fatigue. The Nitinol model exhibits linear elastic Austensite behavior at lower stresses. On further loading, transformation from Austensite to Martensite occurs but behavior is still linear elastic. Beyond full transformation, Martensite exhibits elastic plastic behavior. A similar phenomenon is observed in compression loading. It is supported in Abaqus CAE.

 

 

 

 

 

 

 

 

 

 

2. A multilinear kinematic hardening model is now available in Abaqus 2017. In previous releases, this model was available as a user subroutine material called ABQ_MULTILIN_KINHARD.  Plasticity follows an array of perfectly plastic subvolumes that follow Von-Mises criteria, each with a unique yield strength. This model offers more flexibility than the linear kinematic hardening model. It is available only in Abaqus standard and intended for thermo-mechanical fatigue of metals. It is supported in Abaqus CAE.

3. The definition of damage initiation and damage evolution of cohesive elements with traction separation response has been enhanced to include rate dependent cohesive behavior. It is available only in Abaqus explicit. Non-linear damage initiation of ductile metals is now supported in Abaqus 2017. This model provides more flexibility to predict damage under arbitrary loading paths. It is available both in Abaqus standard as well as in explicit for ductile, shear and Johnson Cook material models.

 

4. Non-linear damage initiation of ductile metals is now supported in Abaqus 2017. This model provides more flexibility to predict damage under arbitrary loading paths. It is available both in Abaqus standard and explicit for ductile, shear and Johnson Cook material models.

5. The parallel rheological framework model now supports plane stress elements as well, in both standard as well as in explicit.

6. A new subroutine for user defined thermal expansion coefficients has been introduced. It is called VUEXPAN. This routine can be used in explicit to define thermal strain increments as a function of temperature, time, element number, state, or field variable. It is available only with Mises plasticity, Hill Plasticity and Johnson Cook model.

Usability Enhancements

1.Enhancements in distortion control: In Abaqus explicit, it is possible to convert highly compressed solid elements to linear kinematic formulation. Once that happens, the analysis does not stop even if the elements get inverted. It is activated by default when solid elements are used with crushable foam material.

2. Larger stable time increments in Abaqus explicit: In Abaqus 2017, there is an improved estimate method of element characteristic length to get larger stable time increments. It is defined in explicit step as follows:

*Dynamic, Explicit, improved DT method=YES (by default) or NO

It is further possible to invoke this method selectively in individual sets instead of global model as follows

*section control, improved DT method = YES or NO

 

Enterprise-wide PLMdata systems hold huge amounts of business data that can potentially be used to drive business decisions and effect process changes to generate added value for the organization.  Several PLM users are unaware of the existence of such valuable data, while for others, advanced data search and retrieval can feel like looking for a needle in a haystack due to their unfamiliarity with the PLM data model. Hence it is important to process the data into meaningful information and model it into actionable engineering knowledge that can drive business decisions for normal users. Reporting plays a key role in summarizing that large amount of data into a simple, usable format for the purpose of easy understanding.

Reporting starts with capturing the right data – the most important step and, many a time, the least stressed one. When data is not captured in the right format, it results in inconsistent or non-standard data.

Let’s take a simple Workflow process example: Workflow rejection comments are valuable information for companies to understand the repeated reasons for workflow rejection and to improve FTY (First time yield) by developing training plans to address them.  Users might not enter rejection comments unless they are made mandatory, so it’s important to have data-model checks and balances to capture the right data and standardize it through categorization and LOVs (List of values).

reportThe next step is to filter and present the right information to the right people. End Users typically want to run pre-designed reports and maybe slice or dice the data to understand it better. Business Intelligence Designers and Business analysts who understand the PLM Schema and their business relationships are the ones who design the report templates. Report design is sometimes perceived as an IT or software function, and as a result, enough business participation is not ensured, which can have an impact on the effectiveness of the reports for end users. It is important to have business participation from report identification to report design to report usage. Business process knowledge is the key in this area, not the PLM tool expertise alone.

Since business processes get improved/modified based on different market and performance trends derived from PLM reports, it’s important to have continuous improvement initiatives to fine-tune reporting based on these improved processes and new baselines, from data capture to presentation. That makes it a continuous cycle – business processes need to be designed to support reporting and reports need to help improve the process.

Properly designed reports provide increased visibility into shifting enterprise wide status, reduce time and cost for data analysis, ensure quicker response times and faster product launch cycles and improve product quality and integrity.

How do your reports measure up? Do you have any questions or thoughts? Leave a comment here or contact us if you’re feeling shy.

The Dassault Systèmes SIMULIA portfolio releases new versions of its software products every year, and this year is no different. The first release of Abaqus 2017 is now available for download at the media download portal. SIMULIA has developed and broadcast 2017 release webinars to make users aware of new features available in the 2017 release, but those webinars are long recordings ranging from one to two hours each, which can be daunting. This blog post will provide a brief highlight of standard and explicit updates in the Abaqus 2017 Solver. A more detailed explanation of any mentioned update, or answers to further questions, can be obtained either by listening to the webinar recordings at the SIMULIA 3DExperience user community portal, leaving a comment on this post, or contacting us.

Updates in Abaqus Standard

Abaqus Standard 2017 has been substantially improved with respect to contact formulations. Mentioned below are the key highlights of various contact functionalities improvements.

  • Edge to surface contact has been enhanced with beams as master definition. This new approach facilitates the phenomenon of twist in beams during frictional contact.
  • Cohesive behavior in general contact.

General contact has always been useful in situations where either it becomes cumbersome to visualize and define large number of contact pairs, even by using contact wizard, or it’s not possible to predict contact interactions based on initial configuration. The general contact support now includes cohesive behavior, thereby making it possible to define contact in situations shown in figure below.Image1

 

Cohesive contact does not constrain rotational degree of freedoms. These DOFs should be constrained separately to avoid pivot ratio errors.

There have been few other changes in cohesive contact interactions. In the 2016 release, only first time cohesive contact was allowed by default, i.e. either a closed cohesive behavior at initial contact or an open initial contact that could convert to a close cohesive contact only once. In the 2017 release, only a closed initial contact could maintain a cohesive behavior by default settings. Any open contact cannot be converted to cohesive contact later. However, it is possible to change the default settings.

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  • Linear complementary problem

A new step feature has been defined to remove some limitations of perturbation step. In earlier releases, it was not possible to define a contact in perturbation step that changes its status from open to close or vice versa. In 2017 release, an LCP type technique has been introduced in perturbation step to define frictionless, small sliding contact that could change its contact status. No other forms of non-linearity can be supported in perturbation steps.  LCP is available only for static problems. Any dynamic step is not supported.

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Updates in Abaqus XFEM (crack modeling) […]

Autodesk Vault offers several methods and workflows for finding files, understanding your data, and organizing your work.  Let’s take a look at each.

  1. Basic search – This search essentially searches the file name and all the properties where the “Basic Search” option is turned on in the properties administration area.  This can be a very broad search if you use a lot of different properties in Vault.  Many people will use this to see if they can start getting some relevant results, and then will use one of the other more advanced search types if the basic search returns too many results.basic-search
  2. Criteria search – This is my preferred search for narrowing down a set of results to just what I am looking for.  The criteria search lets you start with a basic search, but then lets you refine the results by entering values for specific properties.  As an example, you could search for a document created by a specific user, within the last 6 months, for a specific project, and with the word “collet” in one of the other properties.  This should result in a very targeted result, and works well when you remember that you created something a while back, but just can’t remember the file name or where it was saved.criteria-search
  3. Advanced search – The advanced search is even more structured than the criteria search.  It allows for the same level of refinement for results, but is in a more rigid interface in its own window. There are separate tabs for the basic search, advanced search and options.  Unfortunately, the basic and advanced options can’t be combined into a single search like with the criteria search.  The big advantage of the advanced search is in the ability to save a “search folder,” which I’ll explain next.advanced-find
  4. Search folders – Search folders are saved from the advanced search interface, and allow you to reuse search criteria in a very fast and easy to use manner.  When a search is saved as a folder, it shows up in the folder list on the left of the Vault client interface. You can simply pick on one of these search folders to display an updated list of all that search’s results. I commonly use this to display all the files I still have checked out to me.  As a manager, this is also a good folder to make sure other users are consistently remembering to check in their files as well.search-folders

The Dassault Systèmes SIMULIA portfolio releases new versions of its software products every year, and this year is no different. The first release of Abaqus 2017 is now available for download at the media download portal. In this blog post, I provide a brief highlight of updates in Abaqus CAE 2017. A more detailed explanation of any mentioned update, or answers to further questions, can be obtained either by listening to the webinar recordings at SIMULIA 3D Experience user community portal, leaving a comment on this post, or contacting us.

  • Consistency check for missing sections

Abaqus CAE users would probably agree that this mistake happens quite often, even though the parts with defined section assignments are displayed in a separate color. In previous releases, this check was not included in data check runs, so it was not possible to detect this error unless a full run was executed. In the 2017 release, missing regions can be identified in a data check run, thus saving time by eliminating fatal error runs.

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  • New set and surface queries in query toolset

The sets and surfaces can be created at part as well as assembly level. In earlier releases, it was not possible to see the content of a set or surface in the form of text, though it was possible to visualize the content in the viewport. In the 2017 release, query toolbox includes set and surface definition options. In case of sets, information about geometry, nodes, and elements can be obtained with respect to label, type, connectivity and association with part or instance, whichever is applicable. In case of surfaces, name, type, and association with instances, constraints, or interactions can be obtained.

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  • Geometry face normal query

In the 2017 release, it is possible to visualize the normal of the face or surface by picking it in the viewport. In case of planar faces, normal is displayed instantly. In case of curved faces, CAE prompts the user to pick a point location on the face by various options.

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