***material
   *integration theta_method_a 1. 1.e-9 200
***behavior gen_evp
   **coefficient
      masvol 1.e-8
**elasticity isotropic
young 2.e5
poisson 0.2
**potential gen_evp ep
*criterion mises
*flow plasticity
*isotropic linear
 R0    10
 H     100
***return
