应用改进的无网格方法对双材料界面裂纹进行了分析,积分区域采用基于节点的Voronoi图,通过在裂纹尖端加密节点提高位移场的计算精度,采用位移外插法确定出应力强度因子,避免了应力场的奇异性和振荡性.本文对由环氧树脂和铝-环氧树脂组成的双材料进行分析,对比了均匀离散、均匀细化和局部细化三种不同模型,通过与光弹性实验结果比较可知,采用裂纹尖端局部细化的模型计算量低并且计算效果好,其计算结果与实验结果基本吻合.
参考文献
| [1] | Williams M L .The stress around a fault or crack in dissimilar media[J].Bulletin of the Seismological Society of America,1959,49:199-204. |
| [2] | M.-C. Chen;K.Y. Sze .A novel hybrid finite element analysis of bimaterial wedge problems[J].Engineering Fracture Mechanics,2001(13):1463-1476. |
| [3] | Christina Bjerken;Christer Persson .A numerical method for calculating stress intensity factors for interface cracks in bimaterials[J].Engineering Fracture Mechanics,2002(2):235-246. |
| [4] | Pan E;AMADEI B .Boundary element analysis of fracture mechanics in anisotropic bimaterials[J].Engineering Analysis With Boundary Elements,1999,23:683-691. |
| [5] | 张明;姚振汉;杜庆华 .双材料界面裂纹应力强度因子的边界元分析[J].应用力学学报,1999,16(01):21-27. |
| [6] | Belytschko T;LU Y Y;Gu L .Element-free galerkin method[J].International Journal for Numerical Methods in Engineering,1994,37:229-256. |
| [7] | Martin Held .Voronoi diagrams and offset curves of curvilinear polygons[J].Computer-Aided Design,1998(4):287-300. |
| [8] | Huang H.;Kardomateas GA. .Mixed-mode stress intensity factors for cracks located at or parallel to the interface in bimaterial half planes[J].International Journal of Solids and Structures,2001(21):3719-3734. |
| [9] | FINLAYSON E F .Stress intensity factors distributions in bimaterial systems: A three-dimensional photoelastic investigation[D].Virginia:Virginia Polytechnic Institute and State University,1998. |
| [10] | Smelser R E .Evaluation of stress intensity factors for bimaterial bodies using numerical carck flank displacement data[J].International Journal of Fracture,1979,15:135-143. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%