Error in analysis "The independent variables must be arranged in ascending order"? while doing FEM in abaqus. I am using GFRP beam.Any suggestions?

04 April 2019 1 5K Report

I have attached a screenshot for what I'm getting error. I am using for frp beams. Can anyone tell me how to cope with this problem

Christian Willberg

The problem is, that your elasticity matrix is not positive definite. I assume that you used nu_ij and nu_ji, or vice versa. In laminates they are typically not identical due to the symmetry of the elasticity matrix.

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