Application of the hybrid DQ- Heaviside-NURBS method for dynamic analysis of FG-GPLRC cylindrical shells subjected to impulse load

• Published in: Thin-walled structures 2020-10, Vol.155, p.106914, Article 106914
• Main Authors: Heydarpour, Yasin, Mohammadzaheri, Morteza, Ghodsi, Mojtaba, Soltani, Payam, AlJahwari, Farooq, Bahadur, Issam, Al-Amri, Badar
• Format: Article
• Language: English
• Subjects: Cylindrical shells; DQM; Graphene platelets reinforced composite; Heaviside function; Impulse loading; Multi-step method
• ISSN: 0263-8231; 1879-3223
• DOI: 10.1016/j.tws.2020.106914

In this paper, dynamic response of multilayer functionally graded graphene platelets reinforced composite (FG-GPLRC) cylindrical shells in thermal environment under an impulse load is studied based on the first order shear deformation theory (FSDT) of shells. The cylindrical shells under consideration are made up of multiple graphene platelet reinforced composite (GPLRC) layers with uniformly distributed and randomly oriented graphene platelets (GPLs) in each layer. GPL concentration is assumed to be graded in thickness direction. A new differential quadrature method based on direct projection of the Heaviside function is utilized to spatially discretize the governing equations. To solve the resulting system of ordinary differential equations (ODE) in temporal domain, a recently developed multi-step time integration technique, introduced based on the non-uniform rational B-spline (NURBS), is employed. After validating the approach, the effects of the different GPLs distribution patterns, the weight fraction and dimension ratios of the GPLs, temperature change, time durations and types of impulse loading on the dynamic responses of the FG-GPLRC shells are investigated and discussed. It is shown that the addition of only little GPLs to polymer matrix considerably decreases the period of oscillatory portions of the center deflection. •Dynamic response of cylindrical shells under impulse loading is studied.•Cylindrical shells are made of multilayer FG-GPLRC.•Presenting a new DQM based on direct projection of the Heaviside function.•The problem is formulated based on the first order shear deformation theory.•A multi-step NURBS-based method is used to discretize temporal domain.