Bond-associated non-ordinary state-based peridynamic model for multiple spalling simulation of concrete

• 作者: Siyang Yang Xin Gu Qing Zhang Xiaozhou Xia
• 来源期刊: 力学学报（英文版）
• 年，卷（期）: 2021,（7）
• 所属期刊栏目: SOLID MECHANICS
• 页码范围: 1104-1135
• 页数: 32页
• 语种: 英文

摘要

The non-ordinary state-based peridynamic (NOSB PD) model has the capability of incorporating existing constitutive rela-tionships in the classical continuum mechanics.In the present work,we first develop an NOSB PD model corresponding to the Johnson-Holmquist Ⅱ (JH-2) constitutive damage model,which can describe the severe damage of concrete under intense impact compression.Besides,the numerical oscillation problem of the NOSB PD caused by zero-energy mode is analyzed and hence a bond-associated non-ordinary state-based peridynamic (BA-NOSB PD) model is adopted to remove the oscillation.Then,the elastic deformation of a three-dimensional bar is analyzed to verify the capability of BA-NOSB PD in eliminating the numerical oscillation.Furthermore,concrete spalling caused by the interaction of incident compression wave and reflected tension wave is simulated.The dynamic tensile fracture process of concrete multiple spalling is accurately reproduced for several examples according to the spalling number and spalling thickness analysis,illustrating the approach can well simulate and analyze the concrete spalling discontinuities.