Theoretical characterization of mesoscopic dynamic fracture behaviors of concrete based on an extended self-consistent finite stress model (XSFSM)

被引：5
作者：
Li, Dong [1 ,2 ]
Jin, Liu [1 ]
Du, Xiuli [1 ]
Liu, Jingbo [2 ]
机构：
[1] Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing 100124, Peoples R China
[2] Tsinghua Univ, Dept Civil Engn, Beijing 100084, Peoples R China
来源：
THEORETICAL AND APPLIED FRACTURE MECHANICS | 2020年 / 108卷
基金：
国家重点研发计划; 中国国家自然科学基金;
关键词：
Dynamic; Quasi-static; Fracture; Concrete; Cementitious material; Mesoscopic; CRACK-PROPAGATION; COHESIVE ELEMENTS; TENSILE BEHAVIOR; MESHFREE METHOD; GROWTH; PARAMETERS; STRENGTH; SIZE;
D O I：
10.1016/j.tafmec.2020.102677
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
This study presents a theoretical approach to characterize the mesoscopic dynamic fracture behaviors of concrete. Firstly, different fracture behaviors are determined from energy criteria. Secondly, by considering the energy equivalence principle, the Saint-Venant's principle and the Newton's laws of motion, an extended self-consistent finite stress model (XSFSM) is established for dynamic fracture analysis of concrete-like cementitious materials. The XSFSM is validated and modified by comparing with the existing models in design codes and the curve fitting models in literatures. Thirdly, the XSFSM is utilized to propose the meso-level fracture criterion of concrete based on a morphological material model. Parametric study illustrates that the criterion can predict the transgranular and intergranular failure modes of concrete under quasi-static to dynamic loading. At last, assumptions and limitations of the present theoretical approach and its prospects in computational methods are discussed.
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页数：15
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