A coupled DQ-Heaviside-NURBS approach to investigate nonlinear dynamic response of GRE cylindrical shells under impulse loads, By Yasin Heydarpour

Research

Title	A coupled DQ-Heaviside-NURBS approach to investigate nonlinear dynamic response of GRE cylindrical shells under impulse loads
Type	Article
Keywords	Impulse load cylindrical shells Glass fibre-reinforced epoxy laminated composite DQM Heaviside function multi-step time integration scheme
Journal	THIN-WALLED STRUCTURES
DOI	10.1016/j.tws.2021.107958
Researchers	Yasin Heydarpour (First researcher) , Morteza Mohammadzaheri (Second researcher) , Mojtaba Ghodsi (Third researcher) , payam soltani (Fourth researcher) , Farooq AlJahwari (Fifth researcher) , Issam Bahadur (Not in first six researchers) , Badar Al-amri (Not in first six researchers)

Abstract

As a first endeavour, nonlinear dynamic response of the glass fibre-reinforced epoxy (GRE) laminated composite cylindrical shells under an impulse load is investigated based on the first-order shear deformation theory (FSDT) of shells. Green’s strain and von Kármán hypothesis are assumed to consider the geometrical nonlinearity due to large deformation in the model. A new solution procedure composed of the differential quadrature method (DQM) based on the direct projection of the Heaviside function and a non-uniform rational B-spline (NURBS) based multi-step time integration scheme is employed to discretize the governing equations in the spatial and temporal domains, respectively. The approach is validated by showing its fast convergence rate and performing comparison studies with available solutions in the limited available cases. A comprehensive parametric study is performed then on the model and the effects of the geometrical parameters, number of layers, load location, time durations, and types of impulse loading on the nonlinear dynamic responses of GRE laminated composite cylindrical shells are investigated.