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分析了复合材料夹杂黏弹性阻尼材料组成的对称层合板的线性弯曲,其中夹杂的黏弹性阻尼材料作为各向同性材料处理,既考虑面内应变能又考虑横向切应力应变能,用Ritz法研究各应力分量的应变能。以四边夹紧为边界条件的方形板为例,计算并分析了复合材料层和黏弹性层的应变能以及复合结构的损耗因子。结果表明,复合材料层的面内应变能占主要地位,而黏弹性层中xz方向和yz方向的切应力应变能占主要地位。黏弹性层与复合材料层的弹性模量之间的差异对复合结构的损耗因子有重要影响。
The linear bending of a symmetric laminate consisting of a composite material with viscoelastic damping material was investigated. Inclusion of the viscoelastic damping material as an isotropic material, considering both in-plane strain and transverse shear stress, was studied by Ritz method Strain energy of each stress component. Taking square plates with four edges clamped as boundary condition as an example, the strain energy of the composite layer and the viscoelastic layer and the loss factor of the composite structure are calculated and analyzed. The results show that the in-plane strain energy of the composite layer is dominant, while the shear stress in the xz and yz directions of the viscoelastic layer is dominant. The difference between the elastic moduli of the viscoelastic layer and the composite layer has a significant effect on the loss factor of the composite structure.