文献类型：期刊文献

英文题名：Fracturing behavior and mechanism of flawed disc specimens under compressive loading using geometry-constraint-based nonordinary state-based peridynamics

作者：Niu, Yong[1];Shou, Yundong[2];Guo, Pengfei[1];Hu, Yunjin[1];Liu, Bolong[1];Wang, Longfei[3];Zhang, Ranran[4]

机构：[1]Shaoxing Univ, Key Lab Rock Mech & Geohazards Zhejiang Prov, Shaoxing 312099, Zhejiang, Peoples R China;[2]Wuhan Univ, Sch Civil Engn, Wuhan 430072, Peoples R China;[3]Henan Polytech Univ, Sch Energy Sci & Engn, Jiaozuo, Peoples R China;[4]Zhejiang Univ Sci & Technol, Sch Environm & Nat Resources, Hangzhou, Peoples R China

年份：2024

卷号：47

期号：9

起止页码：3324

外文期刊名：FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES

收录：SCI-EXPANDED(收录号：WOS:001253860900001)、、EI(收录号：20242616420608)、Scopus(收录号：2-s2.0-85196851165)、WOS

基金：Key Laboratory of Rock Mechanics and Geohazards of Zhejiang Province, Grant/Award Number: ZJRMG-2022-02; National Natural Science Foundation of China, Grant/Award Number: 42107029; Shaoxing Basic Public Welfare Planning Project, Grant/Award Number:2022A13004; Natural Science Foundation of Hubei Province, Grant/Award Number:2023AFB589

语种：英文

外文关键词：failure mechanism; fracture; fracture toughness; GC-NOSBPD model; kinematic constraint (KC)

外文摘要：A geometry-constraint-based nonordinary state-based peridynamic (GC-NOSBPD) model is developed to investigate the fracture characteristics of flawed brittle disc specimens under compressive loading as well as its fracturing mechanism. The bond-associated horizon (BAH) size is directly defined based on the kinematic constraint (KC). This proposed model can well mitigate the numerical oscillation. The failure criteria based on the bond-associated stress state are utilized to simulate the fracture of materials. Two stress effects can offer an insight into the fracturing mechanism of flawed specimens. The failure modes of flawed specimens are controlled by the tensile failure, and the crack growth trajectories acquired by the present numerical model are equivalent to those obtained by the experimental observations. The effects of size and crack inclination angles on the fracture toughness of brittle materials are assessed. The GC-NOSBPD model is competent for evaluating the fracture damage of flawed brittle materials and understanding its failure mechanism. The geometry-constraint-based nonordinary state-based peridynamics is developed. The numerical oscillation caused by zero-energy mode is mitigated by this model. The bond-associated horizon size can be defined based on the kinematic constraints. The fracturing behavior and mechanism of flawed disc specimens are investigated.