Bend/Twist Coupling Effects of Unsymmetric and Unbalanced Laminate
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摘要: 在对称层板的基础上添加铺层使得整个层板成为非对称或非均衡层板,用数值计算方法对添加铺层后的层板在拉或弯载荷下由于弯扭耦合效应产生的端面变形进行了研究,得到了最有利的添加层铺层位置和添加层铺设角,并用蜂窝夹芯板模拟机翼翼盒进行了实验验证.实验表明,从数值计算所得到的结果与实验结果相比具有良好的一致性.Abstract: In order to obtain particular twist angle of composite structure, utilizing the coupling effects of unsymmetric&unbalanced laminate is a considerable approach. An unsymmetric&unbalanced laminate is formed by adding a sub-laminate into the symmetric laminate. How to lay the sub-laminate and what the optimal orientation angle of the sub-laminate is are studied in order to make the most use of coupling effects by nonlinear finite element methods. Test results of honeycomb core sandwich composite laminate simulating the wing-box under the load of aerodynamics demonstrate that the calculating results well accord with the test results and unsymmetric&unbalanced laminates have prospective engineering applications.
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Key words:
- coupling /
- composite materials /
- laminates /
- unsymmetric and unbalanced laminate /
- twisting distortion
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[1] Michael H Shirk,Terrace J Hertz. Aeroelastic tailoring—theory, practice, and promise[J].J Aircraft,1985,23(1):6~18. [2] Terrace A Weisshaar. Aeroelastic tailoring of forward swept composite wings[J].J Aircraft,1981,18(8):669~676． [3] 琼斯R M.复合材料力学[M].朱颐龄译.上海:上海科学技术出版社,1981. [4] 航空航天工业部科学技术研究院.复合材料设计手册[M].北京:航空工业出版社,1990. -
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