有限平板共线裂纹断裂过程的数值模拟和实验研究  

Numerical Simulation and Experimental Study on Collinear Cracks Fracture of the Finite Plate

作　　者：彭英 崔小朝[2] 邱选兵[2] 

机构地区：[1]太原科技大学经济与管理学院,山西太原030024 [2]太原科技大学应用科学学院,山西太原030024

出　　处：《中北大学学报（自然科学版）》2017年第5期639-644,共6页Journal of North University of China(Natural Science Edition)

基　　金：国家自然基金资助项目(51574171);山西省高等学校科技创新项目(2015166)

摘　　要：采用有限元数值模拟和光弹实验方法分析了各向同性材料共线多裂纹应力场及其强度参量.建立了有限弹性平板内三条共线裂纹计算模型,应用ABAQUS软件的VCCT方法分析计算各向同性材料共线裂纹的裂纹尖端的应力场、应变场分布规律及应力强度因子.并通过光弹实验实测了6061铝板共线裂纹试件的裂纹尖端的应力强度因子.研究结果表明,实验和数值模拟所得的应力云图相似,应力强度因子值基本一致,验证了提出的应力强度因子计算模型的有效性.The stress field and strength of the multiple cracks propagation of isotropic material were analyzed by using finite element numerical simulation and photoelastic experiment.The computational model of the tri-linear collinear cracks was established for the finite elastic plate.The stress intensity factors（SIFs）,stress field distribution and propagation stress nephogram of the crack tips were computed and analyzed by using virtual crack closure technique（VCCT）numerical solution in ABAQUS.Meanwhile,they were measured and validated by using the photoelastic experiment of the model 6061 aluminium sample with collinear cracks.The study results indicate that the stress intensity factor and propagation stress are identical in the experiment and simulation,the propagation direction and tendency also agree with each other.So the proposed approach for SIFs is effectively verified.

关 键 词：多裂纹扩展 有限平板共线裂纹 应力强度因子 应力云图 光弹实验 

分 类 号：TP277[自动化与计算机技术—检测技术与自动化装置]