Hi everybody
I'm using abaqus dynamic implicit solver to analyze hip joint. There is not problem like this with static step. but i have to use time depended loads. so when i use dynamic implicit; there are stresses only in force applied area but no stress or displacement in anywhere else. i also tried with dynamic explicit step and concentrated and pressure loads but the problem didnt solve.
i've used frictionless surface to surface contact and fixed a region far from load applied area. and material properties defined by mimics software.
i'll also add a photo and abaqus files fore details. thanks alot for your help.
Firstly, point load is a fiction; i.e. simplification of distributed load over a small area. So distribute the same load over small area.
Now, you're fixing both femur as well as hip. From geometry itself, it's clear that hip is quite rigid. Therefore, it'll take quite good amount of loading for it to actually bend (coz fixed bc) and make contact. Since you're running it dynamically, you can just use pinned condition on hip or completely free (no bc).
Abhimanyu Kumar thanks for your help
i used pressure instead of point force and removed BC of hip as you said. but the problem not resolved.
Abhimanyu Kumar Hip behaves like it's rigid and totally fixed
Have you checked consistency of unit that you defined? What is the unit you used for Force, Distance, Density and Time?
You can refer to previous discussion on units: https://www.researchgate.net/post/What_are_the_units_used_in_the_ABAQUS_model
Chee Loong Chin Thanks a lot for your helpful answer.
Units were not consistent. The mimics soft had defined density in g/cm3 but because distances was in mm; the consistent unit for density was tonne/mm3.
Problem solved and thank you again.
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