abaqus报错

The strain at failure must be greater than zero

*density requires the use of *user material, *elastic, *eos, *hyperelastic, *anisotropic hyperelastic, *hyperfoam, *low density foam or *fabric

*drucker prager requires the use of *elastic or *porous elastic, type=logarithmic, or the combination of *eos and *eos shear, type=elastic options

53064 elements are missing elastic property reference. The elements have been identified in element set ErrElemMissingElasticPropRef.

Analysis Input File Processor exited with an error - Please see the  Job-1.dat file for possible error messages if the file exists.