Archive

Posts Tagged ‘SW2011’

High Stress Concentrations in FEA Analysis

June 12th, 2011

People who have used SolidWorks Simulation, and indeed other FEA software, will be aware that sharp re-entrant corners will cause high stress concentrations in a final stress plot. Increasing the mesh in this area will only serve to increase the stress intensity. Small fillets are usually applied, or in some cases the mesh is coarsened in this area.

(Reference)

Many models have inside or re-entrant corners which can cause high stress concentrations

High Stress Concentrations are also caused by incorrect boundary conditions (aka loads and restraints).

Example 1 – Tensile Test

The video on the following page compares Hand Calculations to SimulationXpress and SolidWorks Simulation with Reference Geometry restraints, for a tensile test of a steel cylinder.
Simply putting a “Fixed” restraint on a face (which a lot of people just do) is a blind and often an incorrect approach and can cause high stress concentrations. A better method involving using a “Sliding” restraint combined with a Reference Geometry condition can be used to overcome these high stress concentrations.

Putting a "Fixed" restraint on a face may cause high stress concentrations.

 Example 2 – Use a Soft Material

The following article proposes to use a “springy foundation pad” with a low youngs modulus and low poisson’s ratio, attached to the part you want to secure. The springy material will absorb high stress concentrations when a force is applied. Link -> http://www.capinc.com/2011/04/06/imaginary-materials

Use a springy foundation pad part or body attached to the part being loaded

Note: Archived originals

Simulation (FEA) , , ,

Copy and Paste a SolidWorks Drawing directly into Draftsight or AutoCAD

May 17th, 2011

I recently came across a Youtube video showing how in SolidWorks 2007, a drawing view (2D) could be copied and pasted directly from SolidWorks into DWGEditor (now called 2D Editor). As DraftSight is the new free 2D CAD Tool, I wanted to see if this would work in SolidWorks 2011 and Draftsight.

It does work, and very nicely.
If you want to quickly copy a SolidWorks Drawing View into Draftsight/AutoCAD/DWG without having to go Saving As a DWG etc. this tip will save time.

Copy from SolidWorks to DWG / Draftsight
  1. Select the Drawing View in SolidWorks
  2. Edit (drop-down menu) -> Copy to DWG Format
  3. Go to Draftsight
  4. Edit (drop-down menu) -> Paste
  5. Left Click to Paste the View into Draftsight

 

Select Drawing View in SW -> Edit Menu -> Copy to DWG Format -> Go to CAD -> Edit -> Paste

Of course the reverse is equally true. You can copy and paste directly from Draftsight DWG into a new Sketch in SolidWorks. CTRL+C and CTRL+V make things nice and easy.

Copy from DWG / Draftsight to SolidWorks
  1. Window select what you want to copy in Draftsight/CAD
  2. Press CTRL+C
  3. Go to SolidWorks
  4. Create a New Part
  5. Create a New Sketch
  6. Left Click into the Graphics Area
  7. Press CTRL+V
  8. Zoom out
About Draftsight

Just a quick word on draftsight. It is a free 2D CAD Program which will let you open and save all version of AutoCAD. Its interface is very similar to AutoCAD with layers, grid, layouts and object tracking (called etrack). I remember using AutoSketch in 1999 which I got from a Computer Magazine, to draw up go-kart plans. If I had Draftsight back then, things would have been a lot easier. Draftsight is available for Windows, Apple MACs and also Ubuntu Linux. Head to www.draftsight.com to download your copy now.

How-To , , ,

Windows Installer Error 1719 (Windows 7 x64)

January 22nd, 2011

I was recently trying to install SolidWorks 2011 on Windows 7 x64 and it failed. Typically I’d expect problems with XP x64, but not with Windows 7 with .Net and Windows Installer all part of the OS.

Diagnosis

The SolidWorks Installation Manager provided a link to the Installation Logs ( C:\Users\username\AppData\Roaming\SolidWorks\Installation Logs\2011 SP0 ). Looking at the latest txt file ( SummaryIMLog_20110.txt ) I saw “Installation Error 1719” and “Installation Error 1603”.

I also looked at the Windows Event Viewer, and saw the failed installation and the Error 1719. See image below.

Windows Event Viewer Logs showing the exact 1719 SolidWorks Installation Error

First Attempted Solution

  • As Windows Installer v5 is part of Windows 7, it would not show up in Add/Remove Programs to do a repair (as I would have done for XP).
  • Make sure that the Windows Installer service is running  (Control Panel -> System and Security -> Administrative Tools -> Services)
  • As on the SW KB, I had tried registering and reregistering Windows Installer.
    Command Prompt:
    msiexec.exe /unregister
    msiexec /regserver
    C:\Windows\Syswow64\Msiexec /regserver
  • I even browsed directly to the SolidWorks setup (bypassing the Installation Manager), but it immediately threw up the 1719 error and stopped.

This image shows the exact path to the Manual Setup for SolidWorks 2011 x64 bypassing the Installation Manager.

 

Final Solution to 1719 Installation Error

  1. Start, then Run, then type regedit 
  2. Go to HKEY_LOCAL_MACHINE\SYSTEM\CURRENT CONTROL SET\SERVICES\MSIserver\WOW64            
  3. Right click on WOW64, then select Modify      
  4. Set Value Data to 0 (mine was set at 1) and Base should be Hexadecimal
    (see below image for screenshot)
  5. Close the Registry Editor
  6. Reboot the PC
    OR
    Command Prompt: net stop msiserver    and net start msiserver
  7. Install SolidWorks 

Reference

The Windows START -> Run option in Windows 7. Note the run box is now the search box in Windows 7.Screenshot of the Registry showing the 1719 solution which worked.

How-To, Note to Remember , ,

Default Templates for Novice Interface

January 14th, 2011

Here is a little nuisance I came across recently:

When changing the templates that the novice interface uses, it was a little tricky. It turns out that the Novice Interface selects the first alphabetical template.

I had thought it would have used the Default Templates under Tools -> Options -> Default Templates, but I was mistaken.

So if your templates are stored in: C:\ProgramData\SolidWorks\SolidWorks 2011\templates, and you want a new Drawing, it will select the first alphabetical drawing template (*.drwdot) in that folder.
To verify and check where your templates are stored: Tools -> Options -> File Locations -> Document Templates

Personally I always use the Advanced interface, but to each his/her own.

Note to Remember ,