Damage growth and strain localization in compressive loaded fiber reinforced composites
Artikel i vetenskaplig tidskrift, 2018

To increase the use of polymeric structural composites, a major issue is to properly account for intra-laminar failure mechanisms, such as fiber kinking which is typically induced in compression. We propose a new set of continuum damage models that are able to predict fiber kinking response under compression. A structure tensor based formulation is established at the unidirectional ply level, where the elastic material response is governed by transverse isotropy. To consider geometrical effects in conjunction with fiber kinking instability, a continuum damage formulation at finite strain is developed. The fracture area progression includes a convective and a local damage production involving a finite progression speed. In this framework, two damage evolution models are considered; one non–local model including the gradient damage effect and a local one, without the gradient enhancement. The models are implemented in a FE–code and validated for a compression loaded specimen. The models are computationally robust and can predict the localized nature of fiber kinking. A thorough sensitivity study is presented to show how the different formulations influence the predicted responses.

Fiber kinking,

Composites

Localization

Damage

Non–local damage

Fracture modeling

Författare

Ragnar Larsson

Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

Renaud Gutkin

Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

Mohammad Sadegh Rouhi

Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

Mechanics of Materials

0167-6636 (ISSN)

Vol. 127 77-90

Drivkrafter

Hållbar utveckling

Styrkeområden

Transport

Materialvetenskap

Ämneskategorier

Teknisk mekanik

Pappers-, massa- och fiberteknik

Infrastrukturteknik

Fundament

Grundläggande vetenskaper

DOI

10.1016/j.mechmat.2018.09.001

Mer information

Senast uppdaterat

2018-09-23