Abaqus 6.14 CAE - Imperfection Study
Abaqus 6.14 CAE - Imperfection Study
(OP)
The title of the project is as follows:
A study of the effect of imperfections on the buckling capability of a soda can under axial loading.
My group and I are aiming to carry out the following:[/li]
Linear buckling analysis of soda can to gain first 5 eigenvalues Riks buckling analysis with plasticity and the introduction of imperfections in the form of wall thickness Riks buckling analysis with plasticity and the introduction of imperfections in the form of out-of-roundness Experimental analysis on an Instron machine to compare with results gained on Abaqus CAE
The following steps were carried out for he linear buckling analysis:
Create part (Shell, extrusion) Apply material properties and section Mesh – Sweep Sets of up and down slave nodes with master reference points Steps – Linear perturbation, Buckle Apply constraints, BCs and load
The same was then carried out for the Riks analysis with the following changes:
Add plasticity values for material using true-stress strain curve Steps- Riks, static step Load is set for that to be equal to first buckling load (-2554.5 Pa) Apply load equal to that of the first buckling load Introduce imperfections using edit keywords window Max deformation from linear buckling analysis normalised (1/1.092E-03) Multiply by thickness (0.097E-03) Multiply by 0.1 for 10% imperfection, 0.2 for 20% and so on
Using the edit keywords window, I typed in what's shown on the attached image (where Buckle_load are the results from the linear analysis)
We are now stuck on how to compute the imperfection in terms of out of roundness. Any suggestions would be much appreciated!
A study of the effect of imperfections on the buckling capability of a soda can under axial loading.
My group and I are aiming to carry out the following:[/li]
The following steps were carried out for he linear buckling analysis:
The same was then carried out for the Riks analysis with the following changes:
Using the edit keywords window, I typed in what's shown on the attached image (where Buckle_load are the results from the linear analysis)
We are now stuck on how to compute the imperfection in terms of out of roundness. Any suggestions would be much appreciated!





RE: Abaqus 6.14 CAE - Imperfection Study
*NODE FILE
U
The following was typed in the edit keywords for the Riks method:
*IMPERFECTION, FILE=Buckle_load, STEP=1
1, 0.010591
2, 5.2953E-03
3, 2.6477E-03