I am doing non linear buckling analysis on laminate composite shell , as we know that we have different type of imperfection in cylindrical shells that is geometric and material imperfections . My question is that will I have to put the sum of these imperfection in Static Riks method , or is there any other method to pud them separately .
It depends on you,. You can do both, analyses with individual imperfection or all in one bowl. You can assess the influence of the individual imperfections by modelling only one type of imperfections in the Shell (geometric, material, loading, etc). However, when you want to validate your model compared to an Experiment, you have to include all possible measured imperfections in the Shell in order to correlate your results with the test result.
Thank you so much @Regina Khakimova for the detailed answer , can you tell me how can I introduce a out of roundness and height of shell as imperfection in a model .Because in abaqus documentation they only introduced thickness of the shell as a imperfection .If you have read some literature about it please do mention .
Thanks
In my paper (Buckling of axially compressed CFRP truncated cones: Experimental and numerical Investigation) I described how to introduce out-of-plane imperfections, thickness imperfection and fiber volume fraction correction.
Thank you @Regina Khakimova , Ma'am can your provide me the link to your paper .
Dear Regina Khakimova,
If we have 2 steps in a job, the first step is a static, general analysis and the second is static, Riks. so how can we apply the imperfection for only the second step in this job? Thank you for your help!
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