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A study of earthquake-induced vibration on laminated composite plates using finite element method

Author

Listed:
  • Prithwish Saha

    (Heritage Institute of Technology)

  • Kalyan Kumar Mandal

    (Jadavpur University)

Abstract

This study presents the dynamic response of an eight-noded composite plate under earthquake excitation. Koyna earthquake excitation frequency is considered for the present study. Central displacement and stresses at various positions are studied extensively. Variation in response under different boundary conditions and varying geometric conditions are presented. The ply angle in a lamina and the number of layers in a plate are also varied to observe their effect on displacement and stress. In almost all the cases, 45° lamination shows maximum displacement response, whereas 0°/90° lamination scheme always shows maximum normal stress values. On the other hand, inplane shear gives maximum response whenever a − 45° layer is present. The effect of plan dimension on displacement is also presented here. The displacement response is maximum when the plate becomes square for both cross- and angle-ply laminations. The displacement response with change in total thickness of the plate is presented in this article. The response increases drastically as the plate becomes thinner for angle and cross-ply laminations. The plate becomes unstable as the side to thickness ratio increases beyond 50. The variation of stresses for cross- and angle-ply laminated plates across their layers is reported here with different boundary conditions. A very important observation made through this comparison as a 45° clamped laminated plate should be designed under transverse shear stress, whereas the simply supported plate should be designed under inplane shear stress.

Suggested Citation

  • Prithwish Saha & Kalyan Kumar Mandal, 2021. "A study of earthquake-induced vibration on laminated composite plates using finite element method," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 106(3), pages 2251-2277, April.
  • Handle: RePEc:spr:nathaz:v:106:y:2021:i:3:d:10.1007_s11069-021-04542-x
    DOI: 10.1007/s11069-021-04542-x
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    References listed on IDEAS

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    1. Alemdar Bayraktar & Temel Türker & Mehmet Akköse & Şevket Ateş, 2010. "The effect of reservoir length on seismic performance of gravity dams to near- and far-fault ground motions," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 52(2), pages 257-275, February.
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