Crack simulation and probability analysis using irregular truss structure modeling equivalent to a continuum structure

作     者：Won Choi Seongsoo Yoon JeongJae Lee 

作者机构：Dept.of Rural Systems EngineeringCollege of Agriculture and Life SciencesSeoul National UniversitySeoul 151-921South Korea Dept.of Agricultural and Rural EngineeringCollege of AgricultureLife and Environments SciencesChungbuk National UniversityChungbuk 362-763South Korea Dept.of Rural Systems EngineeringResearch Institute of Agriculture and Life SciencesCollege of Agriculture and Life SciencesSeoul National UniversitySeoul 151-921South Korea 

出 版 物：《International Journal of Agricultural and Biological Engineering》 (国际农业与生物工程学报（英文）)

年 卷 期：2017年第10卷第1期

页      面：234-247页

核心收录：

学科分类：08[工学] 080102[工学-固体力学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：Chungbuk National University, CBNU Seoul National University 

主　　题：crack simulation probability analysis irregular truss structure model failure criteria Monte Carlo simulation 

摘      要：The problems related to agricultural structure engineering for crack simulation and reliability analysis are complicated because its variables contain wide ranges of mean and standard *** paper describes an integrated model to perform crack simulation and reliability analysis of a continuum *** structure is assumed to be under a two-dimensional plane stress and the deformation is infinitesimal.A truss structure model that has the same behaviour as a continuum structure was developed using irregular triangle truss components where each element consists of two hinges with an axial degree of freedom at both of their ends.A Monte-Carlo simulation(MCS)was adopted for the reliability *** the length of one side of the irregular triangle mesh is shorter than the thickness of the structure,the slenderness associated with compressive failure needs to be examined only for the short *** that reason,the failure criterion suitable for the equivalent truss structure model was established by checking only axial stresses acting on truss *** nodes of the equivalent truss structure model for the structural analysis in this study consist of hinges,development of plastic hinges that occurred during crack propagation were not considered in this *** simulate the development of crack,truss members over allowable stresses of tension or compression among truss members with the largest amount of stress at each completed structural analysis time step were sequentially *** irregular triangle meshes have an uncertainty in themselves to compare with regular meshes,the equivalent truss structure model could describe crack propagation more *** failure probabilities of structures under various loads and boundary conditions had good agreement with the analytical solutions directly solved from the limit state equations expressed in the form of moments.