Improvement and validation of a physically based model for the shear and transverse crushing of orthotropic composites
Artikel i vetenskaplig tidskrift, 2018

This paper details a complete crush model for composite materials with focus on shear dominated crushing under a three-dimensional stress state. The damage evolution laws and final failure strain conditions are based on data extracted from shear experiments. The main advantages of the current model include the following: no need to measure the fracture toughness in shear and transverse compression, mesh objectivity without the need for a regular mesh and finite element characteristic length, a pressure dependency of the nonlinear shear response, accounting for load reversal and some orthotropic effects (making the model suitable for noncrimp fabric composites). The model is validated against a range of relevant experiments, namely a through-the-thickness compression specimen and a flat crush coupon with the fibres oriented at 45° and 90° to the load. Damage growth mechanisms, orientation of the fracture plane, nonlinear evolution of Poisson's ratio and energy absorption are accurately predicted.

finite element analysis

friction

damage mechanics

Crushing

Författare

Sergio Costa

Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

Swerea SICOMP

Thomas Bru

Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

Swerea SICOMP

Robin Olsson

Swerea SICOMP

André Portugal

Journal of Composite Materials

0021-9983 (ISSN) 1530-793X (eISSN)

Ämneskategorier

Geofysisk teknik

Teknisk mekanik

Kompositmaterial och -teknik

DOI

10.1177/0021998318807964

Mer information

Senast uppdaterat

2018-11-01