Static Simulation - Boundary conditions

Mylcia

Hi all, 

What I'm trying to do is to simulate a lower arm of a car scissor jack. 

I've done a calc - as per doc attached. 
I applied 9604.53/2 per each hole. The files are attached to show what boundaries I have used. 

I have little confidence whether I've done it right. Are my boundary conditions correct? I'm not sure how I can check my results? 

Thank you, 

DraftcarJack.fem

DraftcarJack.h3d

DraftcarJack.STEP.hm

Hyperworks.docx

almeidaaap

Hi,

I was taking a look in your model and some attention points:

- As you are using 3D mesh, it´s recommended to have at least 3 elements in the wall thickness, you have only 2;

- Also, your applied load is divergent what you said, the total load is 4800 in both holes, not 4800 in each hole;

- In HyperMesh we have consistent units, which are you using? The Young Modulus looks like in MPa, the density looks like in kg/m^3 and the length in mm;

- You can create a node btw the two holes, create a RBE2 connecting the dependent nodes (holes) and the independent (node created) and apply  the BC at this node;

- We recommend to create individual component to rigids elements.

Some tips to analyse your results:

- What is your goal with this analysis?

- Close your eyes and imagine the response of the geometry due the BCs, and now plot the Displacement and change the deformation scale. The results, makes sense with the reality?

- You can request the SPCF as output in the LoadStep > Output > SPCF, so you can see the reaction forces

- What is your failure criteria (stress, strain, buckling)? They are accepted?

Thanks,

Arthur

community_STATICSIMULATION_BC_Elements.png

community_STATICSIMULATION_BC_Load.png

community_STATICSIMULATION_BC_material.png