计算力学学报2017，Vol.34Issue(3)：274-279,6.DOI:10.7511/jslx201703002
混凝土复合型裂纹扩展的非局部近场动力学建模分析
Non-local peridynamic modelling of mixed-mode fracture of concrete
摘要
Abstract
An extended non-local peridynamic model and corresponding numerical approach are proposed for the simulation of concrete fracture.The difference in mechanical behavior of concrete under tension and compression,as well as the microscopic effect of long-range forces were introduced into the peridynamic constitutive model,and corresponding discretization,loading and time-integration algorithms were developed.The damage of materials was defined locally at the bond scale,and the rotation of bonds of material points were taken into account so as to eliminate the limitation on Poisson''s ratio when using the common bond-based peridynamic constitutive model.Cracks initiate and propagate naturally by solving the integral-type equations of motion without any re-meshing or crack tip singularity.The proposed modified peridynamic model and numerical approach were validated by simulating the mixed-mode crack problems in single-side and double-side notched concrete beams subjected to four-point shearing loads,and comparing the results including the failure mode,pick load and the complete load-CMSD (crack mouth sliding displacement) curves with experimental observations and other numerical results.关键词
混凝土/裂纹扩展/近场动力学/非局部/微极模型Key words
concrete/crack propagation/peridynamics/non-local/micropolar model分类
数理科学引用本文复制引用
秦洪远,黄丹,章青..混凝土复合型裂纹扩展的非局部近场动力学建模分析[J].计算力学学报,2017,34(3):274-279,6.基金项目
国家自然科学基金(11132003,51679077) （11132003,51679077）
中央高校基本科研业务费(2015B18314) （2015B18314）
NSFC-广东联合基金(第二期)超级计算科学应用研究专项资助项目. （第二期）
