I am doing a crush analysis of hollow tubes for finding peak load and energy absorption using abaqus explicit .I want to do it in quasi static way, i followed two methods for my model setup (two rigid shell planar plates and a shell extrusion part between them)
1) simple displacement of of top plate in one direction
B.Conditions used :
a.tie at both the ends surface to surface
b.bottom plate refrence point encastre and top plate rp was able to translate in only one direction
c.then desired displacemnt to rp of top plate in step 1.
For doing in different way for example a force of 150kN at a speed of 3mm/min , what boundary conditions should i use ?
Dear Afaq, Good day
you working with dynamic analysis of composite structures (explicit analysis), so you need to know speed of the rigid body applied on the rigid pate, B.C of the shell, B.C of the plate
and I want to know: you want to analysis only the shell tube?
Thankyou for the reply sir 🙂
If i will apply velocity to the plate wouldn't it be an impact test ? ...their is a tie connection between rigid plates n shell at both the ends...the bottom plate is encastre and top plate is allowed to move only in one direction( towards the bottom plate parallel to the axis of shell)...
When i have given velocity of 15.6 m/s then i ws able to capture the crushing behaviour of simple geometry like square n circular cross section but when i changed geometry no defrmation ws occuring (material ws same general mild steel props.)...this may be bcz of mass moment inertia...but still the velocity is too high..i have to validate some papers in which ex a pin load of 150 kn n velocity 3mm/ min is given ..how to do this ? What kind of step should i use ?
DYNAMIC EXPLICIT OR LINEAR PERTURBATION OR GENERAL ?
Good day.
At the lower end: Ux = Uy = Uz = 0.
At the upper end: Ux = Uy = 0. Uz = F (t).
In the calculation at each step, determine the total force at the top end as an integral over the area from Sz.
Best regards.
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