An enriched shell element formulation for modeling of inter- and intralaminar crack propagation in laminates
Artikel i vetenskaplig tidskrift, 2016

In traditional finite element modeling of progressive failure in laminated fiber reinforced polymers, inter- and intralaminar cracks are normally treated in different ways. Interlaminar cracks are normally described explicitly by building up the laminate using stacked elements (solids or shells) connected by cohesive interface elements. Intralaminar cracks, one the other hand, are more often accounted for by using a continuum damage approach, (e.g. a smeared crack approach). In this paper, we propose a modeling concept which instead can accurately represent both intralaminar and interlaminar cracks with an extended kinematical representation, whereby cracks can be explicitly accounted for without excessive use of degrees of freedom. With this concept, we aim to take one step closer to more efficient FE analyses of progressive laminate failure, since only one shell element through the thickness is required, and where arbitrary inter- and intralaminar crack propagation are accounted for only in areas where it is needed. We show that the current shell formulation proposed can be utilized to describe the kinematics of a laminate containing multiple inter- and intralaminar cracks. Thus, we see significant potential for this modeling concept in analyses in which computational efficiency is of major importance.

Computational efficiency

Multiple interlaminar cracks

XFEM

Shells

Multiple intralaminar cracks

Författare

Jim Brouzoulis

Chalmers, Tillämpad mekanik, Material- och beräkningsmekanik

Martin Fagerström

Chalmers, Tillämpad mekanik, Material- och beräkningsmekanik

Erik Svenning

Chalmers, Tillämpad mekanik, Material- och beräkningsmekanik

Composite Structures

0263-8223 (ISSN)

Vol. 136 616-625

Modelling And Testing for Improved Safety of key composite StructurEs inalternatively powered vehicles (MATISSE)

Europeiska kommissionen (FP7), 2012-10-01 -- 2015-09-30.

Ämneskategorier

Maskinteknik

Teknisk mekanik

Styrkeområden

Transport

Infrastruktur

C3SE (Chalmers Centre for Computational Science and Engineering)

DOI

10.1016/j.compstruct.2015.10.028