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首页> 外文会议>A critical link: Diagnosis to prognosis >Interalyer shear slip effects on the load transfer mechanism in nonsymmetrically constrained thick laminated strips
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Interalyer shear slip effects on the load transfer mechanism in nonsymmetrically constrained thick laminated strips

机译：层间剪切滑移对非对称约束厚层压板​​中载荷传递机理的影响

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In this paper, the plane elasticity solution for the stresses and displacements in a multilayer laminated strip subjected to axially smmetric transverse load is developed including the edge effects due to end condition. The solution corresponds to the shear free end condition neglected in previous works based on enforced transverse displacement conditions at the strip ends. This feature of the solution allows the solution allows the effects of transversely nonsymmetric end constrain on interlaminar shear deformation to be included in the analysis. The resulting eigenfunctions satisfy the necessary equations of equilibrium, conditions of displacement compatibility, requirements on interlaminar stress and displacement continuity, and shear traction free edge conditions. Convergence for enforced zero transverse slope at the strip ends can be established, as the eigenfunctions are orthogonal. Consequently, the solution is exact for the edge conditions corresponding to shear free guided ends. Numerical results are presented for several examples to examine the effects of transversely nonsymmetric end condition on interlaminar shear growth and shear transfer in the presence of interlayer shear slip. The interlaminar shear distributions indicate the impacts of the edge effect are particularly significant in thick laminates and are shown to be the dominant mechanism controlling shear transfer between the layers once interlayer shear slip has developed. In fact, these results indicate load transfer can be severely limited in thick laminates having transversely nonsymmetric boundary conditions when even moderate in-terlayer shear slip occurs. For certain laminate configurations, a radical departure from established solutions which neglect the edge effects can be seen.
机译：在本文中，开发了一种用于多层层压板的轴向和横向横向载荷的应力和位移的平面弹性解，其中包括端部条件引起的边缘效应。该解决方案对应于先前工作中基于带钢端部强制横向位移条件而忽略的无剪切端条件。该解决方案的这一特征允许该解决方案允许将横向非对称端部约束对层间剪切变形的影响包括在分析中。所得的本征函数满足必要的平衡方程，位移相容性条件，层间应力和位移连续性要求以及剪切牵引自由边缘条件。由于本征函数是正交的，因此可以在带状端部建立强制的零横向坡度的收敛。因此，对于与无剪切引导端相对应的边缘条件，该解决方案是准确的。给出了几个示例的数值结果，以检验在存在层间剪切滑移的情况下横向非对称端部条件对层间剪切生长和剪切传递的影响。层间剪切分布表明，边缘效应的影响在厚的层压板中尤为明显，并且一旦形成层间剪切滑移，便显示出是控制层之间剪切传递的主要机制。实际上，这些结果表明，即使发生中等的层间剪切滑移，在具有横向非对称边界条件的厚层压板中，载荷传递也可能受到严重限制。对于某些层压板配置，可以看到与既定解决方案的根本偏离，该解决方案忽略了边缘效应。

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