摘要
为了研究近场动力学对冰受力变形至破坏过程数值模拟的可行性,本文依据近场动力学理论并引入自适应动态松弛法,给出了近场动力学求解动态问题和准静态问题的数值算法,建立了冰材料的近场动力学弹脆性本构模型,对三点弯曲试验进行了数值模拟。研究结果表明:近场动力学方法在破坏问题模拟上具有优势,并且对准静态问题的求解具有非常好的准确性;将三点弯曲试验过程的数值模拟结果与试验结果进行对比发现,变形过程相对误差小于5%,裂纹产生位置、试样折断结果与试验结果一致,说明近场动力学适用于冰材料受力变形至破坏过程的计算分析。
To study the feasibility of Peridynamic simulating the process from deformation to damage of ice under applied force,the three-point bending test of ice is simulated.A elastic-brittle constitutive model of ice material is established and the Peridynamic numerical algorithms solving dynamic problem and quasi static problem are given by combining with the adaptive dynamic relaxation method.The results show that the Peridynamic method has advantages in the damage simulation,and is very accurate to solve the quasi static problem;the numerical simulation results of three-point bending test were compared with the experimental results,which showed that the relative error of deformation process is smaller than 5%,crack location and specimen fracture results are identical with the experimental results.The result indicates that Peridynamic is suitable for application on deformation and damage process of ice material.
作者
薛彦卓
陆锡奎
王庆
白晓龙
李志军
XUE Yanzhuo;LU Xikui;WANG Qing;BAI Xiaolong;LI Zhijun(School,0 Ship Engineering,HarbinEngineering University,Harbin150001,China;Statekey laboratory coastalandofsliore en gineering,Dalian University of Technology,Dalian 116024,China)
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2018年第4期607-613,共7页
Journal of Harbin Engineering University
基金
国家自然科学基金资助项目(51639004)
高技术船舶科研基金项目(G014613002)
关键词
冰
三点弯曲试验
变形$破坏
近场动力学
准静态
自适应动态松弛法
弹脆性本构模型
ice
three-point bending test
deformation
damage
peridynamic
quasi static
adaptive dynamic relaxation
elastic-brittle constitutive model
