应变率
有限元法
分离式霍普金森压力棒
可塑性
机械
标识
DOI:10.1016/j.ijimpeng.2016.01.003
摘要
A computational constitutive model for concrete subjected to dynamic loadings is proposed in this paper. The equation of state is described by P ~ α relationship. The strength model is first proposed for concrete under uniaxial unconfined compression/tension by taking account of strain hardening and softening, dynamic enhancement excluding inertial effect, and then extended to total stress space by taking into consideration the pressure dependency and Lode effect. The newly developed constitutive model is compared with the HJC, RHT and K&C models by employing single element simulation approach and numerical SHPB tests. It transpires that the newly-developed constitutive model for concrete is advantageous over the existing models.
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