As a beginner to soil constitutive modelling, I am learning the hypoplastic models by reading the matlab drivers. I am confused with the matlab file f_hyp.m in the model hypo_camclay. I don’t understand why there is a variable Laux, which is the multiplied by a factor 2. And when the stress increment is calculated, the code uses the Laux instead of Lep.
Thanks a lot.