CAJ | 학술논문

基于奇异单元法和断裂力学理论，针对叉车货叉由于锻造缺陷和疲劳引起的三维裂纹，应用ABAQUS软件研究了一种三维裂纹的建模方法，给出了计算货叉三维裂纹应力强度因子的途径，分析了裂纹深度对应力强度因子的影响。结果表明货叉三维裂纹应力强度因子随裂纹深度的增加而增加，为预测含裂纹货叉的承载能力和剩余寿命、制定判废标准等提供了相关的疲劳断裂分析参数。
기우기이단원법화단렬역학이론，침대차차화차유우단조결함화피로인기적삼유렬문，응용ABAQUS연건연구료일충삼유렬문적건모방법，급출료계산화차삼유렬문응력강도인자적도경，분석료렬문심도대응력강도인자적영향。결과표명화차삼유렬문응력강도인자수렬문심도적증가이증가，위예측함렬문화차적승재능력화잉여수명、제정판폐표준등제공료상관적피로단렬분석삼수。
By using singularity element method and the theory of fracture mechanism ,in light of the cracks on forklift fork caused by the forging defect and fatigue ,and making use of the ABAQUS ,this paper studies a method of building the model of 3D crack ,and gives the path for calculating the stress intensity factor (SIF) of 3D crack on fork ,and analyzes the influence of crack depth on SIF . The results show that the 3D crack SIF on forklift fork increases along with the increase of crack depth ,and this work is valuable to provide requisite fatigue-fracture factors of predicting the loading capacity ,remainder life and failure standard of the cracked forklift fork .