I am doing project in crash box, Experimental result getting only load vs time curve and acceleration vs time curve. i want to get a result in load vs displacement curve and stress vs strain curve. Is there is any possibilities to get a result in load vs displacement curve?
Hello,
a simple but quite not full accurate method would be, to calculate the displacement for each time step from your acceleration-time curve, assuming a uniformingly accelerated movement within each time step. Therefore, you can calculated the displacement s to
s = a/2 t² + v t +s0
with a being the uniform acceleration within the time increment, t the incremental time, v the velocity at the start of the increment and s0 the displacement at the beginning of increment. The actual velocity v at the start of increment can be calculated by
v = a t +v0
with v0 being the velocity at the beginning of the last increment.
Accuracy of this method highly depends on the size of the time increments between the measurements and will rise with increasing measuring frequency.
Best regards
Easy, according to the strain rate what you used, convert it to length scale = displacement.
hi
If your test is based on CRE it is possible to convert. You can convert the time to t* v, it means you can convert the time to displacement on X axes by product of t and the speed of movable jaw (v).
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