Multiscale Modelling of 3D Orthogonal Woven Composite under Ballistic Impact Using FEM
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ISSN 1229-9197 (print version) ISSN 1875-0052 (electronic version)
Multiscale Modelling of 3D Orthogonal Woven Composite under Ballistic Impact Using FEM Mithilesh Kumar Dewangan and S. K. Panigrahi* Department of Mechanical Engineering, Defence Institute of Advanced Technology (DU), Pune 411025, India (Received December 12, 2019; Revised January 27, 2020; Accepted February 8, 2020) Abstract: The present paper deals with the multi-scale modelling and finite element analysis of Kevlar/Epoxy 3D Orthogonal woven composite (3DOWC) subjected to ballistic impact by a conical-cylindrical steel projectile. These are designed by utilising a Micro-Meso-Macro transition approach called Macro Homogeneous-Meso heterogeneous modelling technique. The Micro-Meso-Macro transition approach has been implemented in this research to develop the complex weave architecture of the target plate, and, a voxel-based non-conformal mesh has been used to understand the behaviour of Representative Volume Element (RVE). The model is validated by using 2D weave architecture which has been analysed for conical 90 ยบ projectile made up of 7.62 calibre. The damage properties are implemented using a user-defined function in the explicit analysis VUMAT. The Macro homogeneous results provide the velocity variation and energy absorption of the projectile with respect to the time history. Also, the energy absorption by its constituents are presented here, and substantial validation of results have been observed with the available literature. Keywords: 3D Orthogonal woven composites, Ballistic impact, Multi-scale modelling, RVE
Similarly, Uyanner and Kara [22] studied the influence of the impactor shape on the dynamic response of E-glass/ epoxy laminates. With the development of newer computational and experimental methods, the ballistic behaviour of 3D weaves has become more intriguing which is due to the better resistance to impact loads of 3D textiles and are well documented for 3D orthogonal woven composites which have been reported by many researchers [1,23-27]. Shi et al. [23] utilised the analytical model to understand the energy absorption behaviour of 3D orthogonal woven fabric when subjected to ballistic impact by hemispherical-cylindrical projectiles. Their investigation was mainly focussed on the influence of strain rate on the residual velocities of the projectile by formulating the strain rate and fabric deformation. Jia et al. [24] investigated the ballistic behaviour of 3D orthogonal woven composites made up of Twaron and unsaturated polyester resin with 60 % fibre volume fraction using FEA at the microstructure level. The study enlightens the failure modes, which are tensile and shear for rear surface and for the top surface is compression and shear when subjected to impact by the conically cylindrical projectile. Jia et al. [25] focussed mainly on the ballistic behaviour of 3DOWF using numerical and experimental analysis. Their study highlights the damage mechanism and stress wave propagation for the dry 3D fabric when impacted by the co
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