Damage Progressive Model of Compression of Composite Laminates After Low Velocity Impact
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摘要: 为了分析复合材料层合板低速冲击后的压缩性能,首先用三维动态有限元素法对两种层合板进行了低速冲击损伤模拟计算,以此作为冲击后压缩(CAI)层合板的初始损伤,然后用三维静态有限元对含损伤的层合板进行压缩破坏模拟和剩余强度计算,从而实现了层合板从冲击损伤到压缩破坏损伤全过程的模拟.结果表明,损伤投影面积和CAI强度的计算值与试验结果有较好的一致性.Abstract: Compressive properties of composite laminates after low velocity impact are one of the most serious circumstances that must be taken into account in damage tolerance design of composite structures. In order to investigate compressive properties of composite laminates after low velocity impact, three dimensional dynamic finite element method (FEM) was used to simulate low-velocity impact damage of 2 kinds of composite laminates firstly. Damage distributions and projective damage areas of the laminates were predicted under two impact energy levels. The analyzed damage after im pact was considered to be the initial damage of the laminates under compressive loads. Then three di mensional static FEM was used to simulate the compressive failure process and to calculate residual compressive strengths of the impact damaged laminates. It is achieved to simulate the whole process from initial low-velocity impact damage to final compressive failure of composite laminates. Compared with experimental results, it shows that the numerical predicting results agree with the test results fairly well.
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Key words:
- composite /
- laminate /
- impact /
- damage /
- compression
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[1] 程小全.复合材料层合板与蜂窝夹芯板低速冲击后压缩性能研究 [D]. 博士学位论文.北京: 北京航空航天大学,1998,1—63. [2] Cantwell W J,Morton J.The impact resistance of composite materials—a review[J].Composites,1991,22(5):347—362. doi: 10.1016/0010-4361(91)90549-V [3] 程小全, 吴学仁.复合材料层合板低速冲击损伤容限的改进方法和影响因素[J].高分子材料科学与工程, 2002,18(3):20—25. [4] 程小全, 张子龙, 吴学仁.小试样层合板低速冲击后的剩余压缩强度[J].复合材料学报,2002,19(6):8—12. [5] Yang S H,Sun C T.Indentation law for composite laminates:composite materials.testing and design[R]. ASTM STP 787, 1982,425—449. [6] Hashin Z. Failure criteria for unidirectional fiber composites[J].Journal of Applied Mechanics,1980,47:329—334. doi: 10.1115/1.3153664 [7] 关志东. 复合材料层板及加筋板低速冲击损伤过程的有限元模拟分析[D].博士学位论文.北京: 北京航空航天大学, 1994,58—70. [8] Choi H Y,Chang F K.A model for predicting damage in graphite/epoxy laminated composites resulting from low velocity point impact[J].Journal of Composite Materials,1992,26(14):2134—2169. doi: 10.1177/002199839202601408 [9] Reddy Y S,Reddy J N.Three-dimensional finite element progressive failure analysis of composite laminates under axial extension[J].Journal of Composite Technology & Research,1993,15(2):73—87. [10] 程小全. 复合材料低速冲击后压缩行为研究[R]. 博士后研究工作报告.北京:北京航空材料研究院,2000,39—52. [11] Chang F K,Springer G S.The strength of fiber reinforced composite bends[J].Journal of Composite Materials,1986,20:30—45. doi: 10.1177/002199838602000103 [12] Chang F K,Lessard L B.Damage tolerance of laminated composites containing an open hole and subjected to compressive loadings: Part Ⅰ—Analysis[J].Journal of Composite Materials,1991,25(1):2—43.
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