to open
aw_link.sldprt (or browse to <install_dir>\samples\tutorial\cosmosxpress\aw_link.sldprt).The link part is a small component in an ink cartridge assembly. You need to push the arms of the link apart to assemble the components. To simulate this process, you apply forces normal to the faces of the arms. It is desired to find out the effect of removing the rib on the maximum force that you can apply on each arm safely. The link is made of a plastic material with the following properties:
|
|
|
|
Property |
Value |
|
EX (Elastic modulus) |
8.8e5 N/cm2 |
|
NUXY (Poisson's ratio) |
0.3 |
|
DENS (Mass density) |
0.0014 Kg/cm3 |
|
SIGYLD (Yield strength) |
2.5e4 N/cm2 |
Click here to open
aw_link.sldprt (or browse to <install_dir>\samples\tutorial\cosmosxpress\aw_link.sldprt).
The following are guidelines on how to answer this question:
Enter the material properties of the part according to the above table. The only properties that COSMOSXpress uses to complete the analysis are the EX (elastic modulus), and NUXY (Poisson’s ratio). The SIGYLD (yield strength) is not needed to calculate stresses but is needed to calculate the factor of safety distribution during viewing results. The DENS (mass density) is used to calculate the mass properties in the final report.
Restrain the cylindrical face shown in this figure.
Apply outward forces to the inner faces of the arms. You can define one set for the two faces or define a set for each face. Remember that COSMOSXpress applies the force you specify to each face in the set. If you specify a force of 2 lbs. on two faces in a force set, you are actually applying a total force of 4 lbs. Always preview the forces to make sure they are applied in the proper directions.
Analyze the part using default settings.
After completing the analysis, COSMOSXpress lists the minimum factor of safety. Suppose that this factor is m.
Based on a factor of safety of 2.0, the maximum force that the part can safely support is mxF/2.0.
To study the effect of removing the rib, suppress
Boss-Extrude1 in the FeatureManager
tree. Notice that exclamation marks 
appear on the Analyze and Results
tabs indicating that the current results do not belong to the current
model and you need to reanalyze the model.
Analyze the part again by clicking Update.
After completing the analysis, COSMOSXpress lists the new minimum factor of safety based on the new geometry.
Calculate the maximum force that the part can support without the rib.