A pragmatic orthotropic elasticity-based damage model with spatially distributed properties applied to short glass-fibre reinforced polymers. (November 2021)

• Record Type: Journal Article
• Authors: Holmström, Petter Henrik; Clausen, Arild Holm; Berstad, Torodd; Morin, David; Hopperstad, Odd Sture
• Is Part Of: International journal of solids and structures. Volume 230/231(2021)
• Publication Date: 2021-11
• Subjects: Anisotropic elasticity -- Damage mechanics -- Heterogeneous material properties -- Finite element analysis -- Strength; Mechanics, Applied -- Periodicals; Structural analysis (Engineering) -- Periodicals; Elastic solids -- Periodicals; Mécanique appliquée -- Périodiques; Constructions, Théorie des -- Périodiques; Solides élastiques -- Périodiques; Elastic solids; Mechanics, Applied; Structural analysis (Engineering); Periodicals; 624.18
• DOI: 10.1016/j.ijsolstr.2021.111142
• Languages: English
• ISSNs: 0020-7683

Abstract

Abstract: This article presents a simple progressive damage model for quasi-brittle materials, combining orthotropic elasticity with a scalar damage model including spatial variation of the damage initiation strain and the crack band method for softening regularization. The model's performance is first analyzed from a numerical point of view and then demonstrated for tensile tests ( 0 °, 45 ° and 90 ° ), open-hole tensile tests ( 0 ° ) and three-point bending ( 0 ° and 90 ° ) tests of short fibre-reinforced polypropylene with 15 wt.% and 30 wt.% glass fibres. Despite its simplicity, the model captures the anisotropic elastic and inelastic behaviour observed in experiments. The model is applicable for orthotropic brittle or quasi-brittle materials, where the variability in elastic properties is negligible and the orientation dependency of the fracture strain is small or not relevant for the application.