| 复合材料正交层板基体裂纹预测 |
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| 引用本文： | 李重庵,A.S.D.Wang.复合材料正交层板基体裂纹预测[J].复合材料学报,1986,3(3):28. |
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| 作者姓名： | 李重庵 A.S.D.Wang |
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| 作者单位： | 1.兰州铁道学院机械工程系; |
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| 摘 要： | 将断裂力学的能量释放率概念及A.S.D.Wang在90°层横向裂纹情况的方法推广到层板后期复杂基体裂纹情况,对O2/90n]s层板内的0°层纵向劈裂、0°—90°界面的两种脱层等裂纹形式进行三维有限元分析并得出其应变能释放率与裂纹尺寸的关系曲线,对每种基体开裂给出载荷的理论预测值,与实验结果比较,吻合较好。
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| 收稿时间： | 1985-12-18 |
THE PREDICTION OF MATRIX CRACKS IN CROSS-PLY LAMINATES |
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| Li Chongan,A. S. D. Wang.THE PREDICTION OF MATRIX CRACKS IN CROSS-PLY LAMINATES[J].Acta Materiae Compositae Sinica,1986,3(3):28. |
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| Authors: | Li Chongan A S D Wang |
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| Affiliation: | 1.Department of Mechanical Engineering Lanzhou Railway Institute, Lanzhou, China;2.Department of Mechanical Engineering and Mechanics Drexel University, Philadelphia, PA19104, USA |
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| Abstract: | The concept of energy release rate and the analysis method developed by A.S.D.Wang in the case of transverse cracks are used to predict three types of matrix cracking in crossply laminate family at the late stage of uniaxial tensile loading.Cracking events analysed include longitudinal splitting in 0°-ply,0/90° interface localized delamination emanating from the intersection of the transverse crack and the coupon free edge,and similar delamination around the cross point of the transverse and longitudinal splitting cracks.A 3-D finite element analysis is performed to simulate those clack development procedures and the corresponding energy release rate curves,as functions of crack size a,are obtained on the basis of Irwin's crack closure tech nique.After determining the effective inherent flaw sites,the values of critical loading for considered cracking are then pridicted and found to agree well with the experimental results. |
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