SOLIDWORKS support Monthly News – September 2016

Hello to all,

Welcome to this new edition of the SOLIDWORKS Support Monthly News, coauthored by members of the SOLIDWORKS Technical Support teams worldwide.

Best Tips & Tricks from  Forum users

The forums are a great source of information, and some of the users provide genuine gems of advice for all who care. So go check out the SOLIDWORKS Forums. All can read, but you need to log in to participate.

SOLIDWORKS Desktop

SOLIDWORKS PDM

SOLIDWORKS Simulation

SOLIDWORKS Flow Simulation

So go explore the forums. If you find other good tips and tricks, let us know so we can feature them here in this blog.

When NOT to use Beam elements in SOLIDWORKS Simulation

By Julien Boissat

Most if not all of the writings about beam elements focus on telling when to use beam elements. They tell you something like this:

The basic guidelines for when to use a beam element are:

  • The length of the element is much greater than the width or depth.

  • The element has constant cross-sectional properties.

They don’t tell you, however, when NOT to use beam elements. That’s precisely what I’m going to do Smiling smiley.

Although SOLIDWORKS Simulation automatically treats as Beams all the Structural Members in your model, this absolutely doesn’t mean that you have to blindly accept this default setting. Using beam elements to represent a solid geometry has drastic consequences on the representation of the actual structure, the mesh and results: extreme simplification of geometry, different types of stress outputs, connections with other components. Choosing the appropriate type of element to represent a body requires an engineering sense only humans can have. Don’t let the machine do it for you!

Solid and beam meshes

As a matter of fact, when a solid is treated as a beam, the actual geometry is completely inaccessible to the simulation, and it is replaced with a simple line (straight or curved depending on the case). Therefore, each cross section of the beam is represented by a single point on that line. A set of values (called section properties) represent the mechanical properties of the cross section. They give the beam mesh a behavior that is equivalent to that of the solid mesh taken as a whole.

There are many more consequences to treating a body as a beam or as a solid. The table below aims at giving the main ones:

Solid MeshBeam mesh
  • Computationally expensive
  • Geometry preserved
  • Shape of cross section remains
  • Mechanical behavior derived from solid mesh
  • Results at all locations
  • All 6 components of stress
  • Stress hot spots can be taken into account
  • von Mises stress
  • No-Penetration contacts are available
  • Local variations of the cross section are possible (holes, stiffening plates, etc.)
  • Detailed interactions with the rest of the structure are possible
  • Computationally cheap
  • Geometry replaced with line
  • Section reduced to a point
  • Mechanical behavior from section properties
  • Results at neutral fiber, extrapolated to bounding rectangle of cross section
  • Special stress components (axial, shear, bending)
  • Stress hot spots are ignored
  • von Mises stress not available
  • No-Penetration contacts are not possible
  • Cross section cannot be modified locally
  • Interactions with the rest of the structure are unrefined

 

You will find examples below of cases where Beam elements are not the preferred type for various reasons:

Example 1

In the image below, the vertical I beam should not be treated as a Beam if it is important to take into account the triangular stiffeners.

Exemple1

 

Example 2

In the image below, the horizontal C channels should not be treated as Beams since it would then be impossible to represent the connection with the pin.

 Exemple2

Example 3

In the image below, the I beam should not be treated as a Beam if it is important to take into account either the superimposed rectangular flat plate or the other stiffener.

 Exemple3

Example 4

In the image below, the I beam should not be treated as a Beam. The bonded connection of the plate onto the flange of the I beam cannot be accurately represented if a beam mesh is used..

 Exemple4

 

SOLIDWORKS 2017 Beta

SOLIDWORKS Beta 216 - image1

The SOLIDWORKS 2017 Beta has ended. We want to thank you all for your participation and your precious feedback.

Check out the leader board with the most productive users and VARs of the contest.

Simulation Step-Up Series

Last month, Ramesh started on the topic of Bolt Connectors. He now concludes on that topic with the third and final part.

Next month, Ramesh will move on to Pin Connectors.

Noteworthy Solutions from the SOLIDWORKS Knowledge Base

icon - SW General Hotfix for SOLIDWORKS® 2015 SP5 (SPR#927471)
A hotfix is available for SOLIDWORKS® 2016 SP5 that addresses the following issue:
SPR#927471:  A general instability using SOLIDWORKS® 2015 SP5 with AMD Graphics Cards
Download the hotfix from Solution Id: S-071869.
See also the General Hotfixes page.

icon - SW When I double-click on an individual ‘Sheet-Metal’ feature, why am I not able to see the bend radius, thickness and K-factor values in the graphics area?
All sheet metal part bodies inherit the bend radius and thickness values from the sheet metal parent folder. For this reason, the bend radius, thickness, and K-factor values for an individual ‘Sheet-Metal’ feature do not appear in the graphics area unless you select the ‘Override default parameters’ option in the individual ‘Sheet-Metal’ features.
From Solution Id: S-071694.

Icon - EPDM What do I need to know about problems that are specific to the SOLIDWORKS® PDM 2016 SP4 software?
The following two problems affect the SOLIDWORKS® PDM 2016 SP4 software:
– SPR#972893: Database Server Service fails to generate Notifications and Custom Columns are not shown using PDM Standard 2016 SP4.  This problem prevents the automatic generation of notifications. It also prevents the display of custom columns.
– SPR#973673: Export Rule for BOM data does not output XML file in SOLIDWORKS PDM Professional 2016 SP4.  This problem prevents the export and import of XML data.
These problems do not exist in SOLIDWORKS PDM 2016 SP3 or in older service packs of the SOLIDWORKS PDM 2016 software.
A hotfix is now available to correct these problems.  Please download the hotfix (SWPDM2016SP4_SPR973673_972893_Hotfix.zip) attached to Solution Id: S-071775 and follow the instructions in “Instructions.txt” which is included in the zip file.

Icon - EPDM In the SOLIDWORKS® PDM software, how do I prevent a client from automatically logging in to a vault view or from displaying the login dialog when creating a new e-mail message in the Microsoft® Outlook 2016 software?
In the Microsoft® Outlook 2016 software, the default action of the ‘Attach File’ button is to list files that were recently saved or worked with. This is a new feature in Outlook 2016.
If the list contains files from one or more of your local file vault views and you are not currently logged in to that view, a login prompt appears when you create a new message. Outlook triggers the login prompt when the list of items populate the attach file button and the folders in the view are scanned for the file name.
If you do not want to log in to the file vault view, you can cancel the login prompt and proceed to create the new message.
However, if you do not want Outlook to prompt for login, or to log you in to the view automatically if that setting is active, you can disable that behavior. For instructions, read the document in Solution Id: S-071660.

– – – = = = o o O o o = = = – – –

That’s it for this month. Thanks for reading this edition of SOLIDWORKS Support News. If you need additional help with these issues or any others, please contact your SOLIDWORKS Value Added Reseller.

Also, comments and suggestions are welcome. You can enter them below.

 

Julien Boissat

Julien Boissat

Sr. Technical Customer Support Engineer, SolidWorks, EMEA at DS SolidWorks Corp.
I have been a Tech Support engineer for Simulation products since 2002. I was previously a product manager at SRAC, the original makers of COSMOS for those who remember that time! ;-). I am currently in charge of the content of the certification exams for simulation products. I also initiated and still author the Simulation Knowledge Base and participate as much as possible in the expansion and evolution of the SolidWorks Knowledge Base. Finally, I handle the SolidWorks Support Monthly News blog.