An optimum analysis method of sandwich structures made from elastic-viscoelastic materials

• Published in: Journal of Wuhan University of Technology. Materials science edition Vol. 19; no. 2; pp. 76 - 78
• Main Authors: Chen, Ying-bo, Xia, Yu, Ren, Zhi-gang, Lu, Zhe-an, Wang, Er-lei
• Format: Journal Article
• Language: English
• Published: Wuhan Springer Nature B.V 01.06.2004; Wuhan University of Technology%Wenzhou University
• Subjects: Beams (structural); Clamping; Damping capacity; Eigenvalues; Energy consumption; Iterative methods; Numerical prediction; Sandwich structures; Strain energy methods; Studies; Viscoelastic damping; Viscoelastic materials; sandwich structures; optimum analysis; viscoelastic materials; complex modulus model; loss factor
• ISSN: 1000-2413; 1993-0437
• DOI: 10.1007/BF03000176

Due to a viscoelastic damping middle layer, sandwich structures have the capacity of energy consumption. In this paper, we describe the frequency-dependent property of viscoelastic materials using complex modulus model, and iterative modal strain energy method and iterative complex eigenvalue method are presented to obtain frequency and loss factor of sandwich structures. The two methods are effective and exact for the large-scale complex composite sandwich structures. Then an optimum analysis method is suggested to apply to sandwich structures. Finally, as an example, an optimum analysis of a clamped-clamped sandwich beams is conducted, theoretical closed-form solution and numerical predictions are studied comparatively, and the results agree well.[PUBLICATION ABSTRACT]