| 有限宽度和椭圆孔形状对缺口层合板强度预测的影响 |
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| 引用本文： | 姚卫星,顾怡.有限宽度和椭圆孔形状对缺口层合板强度预测的影响[J].复合材料学报,1989,6(4):21. |
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| 作者姓名： | 姚卫星 顾怡 |
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| 作者单位： | 1.清华大学; |
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| 摘 要： | 本文采用有限元方法对正交各向异性材料含有不同椭圆孔形状的有限宽度板作了分析,给出了有限宽度和椭圆孔形状对应力集中因子K1和孔边应力分布σy(x,0)的影响公式。数值结果表明:正交各向异性板的有限宽度和椭圆孔形状对Kr和σy(x,0)的影响均与各向同性材料不同,所以有限宽度和椭圆孔形状将对缺口层合板强度的预测产生影响。
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| 关 键 词： | ,,,,,,, |
| 收稿时间： | 1988-10-01 |
INFLUENCE OF FINITE WIDTH AND ELLIPTICAL ASPECT ON NOTCHED LAMINATE STRENGTH PREDICTIONS |
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| Yao Weixing Dept.of Mechanical Engineering,Tsinghua University,Beijing
Gu Yi Dept.of Aircraft,Northwestern Polytechnical University,Xi''''an,Shanxi.INFLUENCE OF FINITE WIDTH AND ELLIPTICAL ASPECT ON NOTCHED LAMINATE STRENGTH PREDICTIONS[J].Acta Materiae Compositae Sinica,1989,6(4):21. |
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| Authors: | Yao Weixing Deptof Mechanical Engineering Tsinghua University Beijing
Gu Yi Deptof Aircraft Northwestern Polytechnical University Xi'an Shanxi |
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| Affiliation: | 1.Dept. of Mechanical Engineering, Tsinghua University, Beijing;2.Dept. of Aircraft, Northwestern Polytechnical University, Xi'an, Shanxi |
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| Abstract: | The notched strength of composite laminates is commonly predicted by first determining the. stress distribution within a laminate and subsequently applying a stress fracture criterion to it.Difficulties are encountered in predieting the notched strength because there are no closed-form expression of the stress distribution near the notch in orthotropic materials for finite width plates,ln this paper a finite clement stress analysis is presented for isotropic and orthotropic plates containing as elliptical opening, Formulae for estimating the stress concentration factor KT and stress distribution σy(x,0) near the opening are proposed,in which the influences of finite width and elliptical aspect on KT and σy(x,0) have been taken into account reasonably. Both finite width and elliptical aspect exert an influence on KT and σy(x,0) although the former exert a greater influence than the latter.It also can be seen that the notched strength predicated by the traditional methodology is unreliable. |
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| Keywords: | orthotropic plate finite width plate elliptical opening stress concentration factor stress distribution |
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