Low-velocity Impact Response of Viscoelastic Composite Laminates Considering Large Deflection and Higher-order Shear Deformation
Publish place: Mechanics of Advanced Composite Structures، Vol: 8، Issue: 2
Publish Year: 1400
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_MACS-8-2_016
تاریخ نمایه سازی: 2 دی 1400
Abstract:
This paper presents an experimentally validated finite element analysis of the low-velocity impact on viscoelastic laminates with consideration of large deflection and higher-order shear deformation effects in the time domain. The generalized Maxwell model (Wiechert) is incorporated into the FEM procedure to simulate the viscoelastic feature of the structure. In a geometrically nonlinear analysis, a displacement field considering higher-order shear deformation and large deflection of the laminate is assumed, and the finite element formulation is extracted. To evaluate the contact force, the modified Hertzian contact law is implemented into the finite element program. Numerical results including contact force output histories and deflections are then derived and compared with the experimental data. The obtained results show that the viscoelasticity effect and large deflection have a significant effect on the results, so they must be considered to gain a precise description of the low-velocity impact response. This model achieved good conformance with experimental results.
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Authors
Akbar Tizfahm
Department of Aerospace Engineering, K. N. Toosi University of Technology, Tehran, Iran
Mohammadreza Shokrgozar
Department of Aerospace Engineering, K. N. Toosi University of Technology, Tehran, Iran
A Mozaffari
Department of Aerospace Engineering, K. N. Toosi University of Technology, Tehran, Iran
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