Hybrid-mesh modelling & validation of woven fabric subjected to medium velocity impact. (August 2018)

• Record Type: Journal Article
• Authors: Yang, Eric C.; Linforth, Steven; Ngo, Tuan; Tran, Phuong
• Is Part Of: International journal of mechanical sciences. Volume 144(2018)
• Page Start: 427
• Page End: 437
• Publication Date: 2018-08
• Subjects: Ballistic impact -- Woven fabric -- Hybrid-mesh -- Mesoscopic model -- Damage mechanics; Mechanical engineering -- Periodicals; Génie mécanique -- Périodiques; Mechanical engineering; Maschinenbau; Mechanik; Zeitschrift; Periodicals; 621.05
• DOI: 10.1016/j.ijmecsci.2018.05.017
• Languages: English
• ISSNs: 0020-7403

Abstract

Highlights: A novel hybrid-mesh model is proposed to simulate undulated yarns of the fabric. Mesoscale structures of Kevlar fabrics are captured using Micro CT imaging system. Dynamic responses of an yarn are validated analytically and numerically. Fracture initiations, propagations and various energy components are investigated. Significant reduction in computational time is achieved with the hybrid-mesh model. Abstract: Simulation of the ballistic impact on a woven fabric structure is known to be difficult due to their warp-weft yarn interlacing geometry, the varying cross-section of a yarn along its length, the multi-layer and direction of the fabric, and the contact between individual yarns. To account for the complex geometry and contact behaviour, fabric structures were modelled with meso‑scale (yarn level) geometrical details, which demanded a substantial amount of computational resources. In this research, a hybrid-mesh finite element modelling approach that possesses greater computational efficiency has been developed to simulate the behaviour of multi-layer woven fabrics subjected to medium velocity impact. Yarn models are developed using different mesh sizes: four, six, eight, and twelve solid elements per cross-section with one and two layer mesh arrangements. They are then used to create hybrid-mesh fabric models, in which the finest mesh yarns are placed at the impact centre, and gradually decreasing mesh densities are used towards the fabric boundaries. The FE results, including deformation, stress distribution, and wave propagation, are evaluated. The simulation indicated a significant reduction in computational resources while maintaining the necessary accuracy. Graphical abstract: Image, graphical abstract