CSM玻璃钢复合型断裂的有限元分析

张双寅; C. M. 利奇

CSM玻璃钢复合型断裂的有限元分析

张双寅¹,
C. M. 利奇²

1.
中国科学院力学研究所;
2.
英国曼彻斯特大学理工学院机械工程系

计量
- 文章访问数: 2025
- HTML全文浏览量: 143
- PDF下载量: 741
- 被引次数: 0
出版历程
- 收稿日期: 1985-03-15
- 刊出日期: 1986-08-15

FEM Analysis on Mixed-Mode Fracture of CSM-GRP

Zhang Shuang-yin¹,
C. M. Leech²

1.
Institute of Mechanics, Chinese Academy of Sciences, Beijing;
2.
Dept. of Mech. Eng., UMJST, U.K.

摘要

摘要: 对切短玻璃纤维毡增强聚脂层板的复合型断裂进行了有限元分析。采用八节点四边形等参元的正规型式计算应力分布与损伤区扩展;而用坍塌(collapsed)三角形四分之一点(quarter-point)奇异元计算应力强度因子K_Ⅰ与K_Ⅱ。用节点位移约束与释放技术计算了裂纹扩展过程。对决定应力强度因子K_Ⅰ与K_Ⅱ的三种方法进行了对比。对施加于裂纹顶点节点约束条件的影响进行了评价。最后基于实验测得的断裂载荷与临界裂纹长度,估算了材料在这种受力条件下的复合型临界应力强度因子K_ⅠC和K_ⅡC。

Abstract: An FEM analysis for studying mized-mode fracture problem of chopped strand mat glass fibre reinforced polyester laminate was presented, The analysis was formulated on the basis of 8-node quadrilateral isoparametric element, The collapsed triangular quarter-point singular elements were used for calculating stress intensity factors K_Ⅰ and K_Ⅱ. The crank propagation process was computed by implementing constraint release technique, Three different approaches to the solution of stress intensity factors K_Ⅰ and K_Ⅱ were compared, The effect of constraint condition imposed upon the displacement of the three collapsed nodes of the crack tip elements on the K_Ⅰ and K_Ⅱ results was evaluated, The mixed-mode critical stiress intensity factors K_ⅠC and K_ⅡC were estimated for CSM-GRP through the consideration of K_Ⅰ and K_Ⅱ calculated and the measured failure load and critical crack length in the experiment.

HTML全文

参考文献(10)

[1]	Tracy, D, M,Finite elements for determination of crack tip elastic stress intensity factors, Eng, Frac. Mech,3 (1971), 255-265.
[2]	Henshell, R,D. and K,G, Shaw, Crack tip finite elements are unnecessary,IJNME,9,3 (1975),495-507.
[3]	Pu, S, L,M, A, Hussain and W, E, Lorensen, The collapsed cubic isoparametric element as a singular element for crack problems, IJNME,1l (1978),1727-1742.
[4]	Wang Ke-jen, Hsu Chi-lin and Kao Hua, Calculation of stress intensity factors for combined mode bend specimens, Advances in Research on Strength and Fracture of Materials, 4 (1978),123.
[5]	Shih, C, F,H, G, De Lorenzi and M, D, German, Crack extension modelling with singular quadratic isoparametric elements, Int, 1, of Fracture, 12 (1976),647-651.
[6]	Barsoum, R, S,Triangular quarter-point elements as elastic and perfectly-plastic crack tip elements, IJNME, (1977),85-98.
[7]	Yamada, Y,Y, Ezawa and I, Nishiguchi, Reconsiderations on singularity of crack tip elements, IJNME, 14, 10 (1979),1525-1544.
[8]	Sih, G, C,Fracture mechanics of composite materials, Proceedings of First USA-USSR Symposium on Fracture of Composite Materials, Editors G, C, Sih and V, P.Tamuzs, held in Riga, USSR, 4-7, Sep, (1978), 111-130.
[9]	Wang, S, S,J, F, Yau and H, T, Corten, A mixed-mode crack analysis of rectilinear anisotropic solids using conservation laws of elasticity, Inter, J.Fracture, 16,3,June (I980),247-259.
[10]	Owen, M, J,Biasial failure of GRP-mechanisms, modes and theories, composite structures 2,Proceedings of the 2nd International Conferences on Composite Structures,held at Paisley College of Technology,Scotland, 14-16, Sep, (1983),Applied Science Publishers (1983),21-39.