Accurate simulation of delamination growth under mixed-mode loading using cohesive elements: Definition of interlaminar strengths and elastic stiffness

• Type: Article in International Scientific Journal
• Date: 2010

Authors

Turon, A (Author) Other; Camanho, PP (Author) FEUP; Costa, J (Author) Other; Renart, J (Author) Other

Journal

Title: Composite Structures

Vol. 92 No. 2

Pages: 1857-1864

ISSN: 0263-8223

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 310 Citations

ISI Web of Science

Scopus - 375 Citations

COMPENDEX

INSPEC

Scientific classification

FOS: Engineering and technology > Materials engineering

CORDIS: Technological sciences > Engineering > Mechanical engineering

Other information

Authenticus ID: P-003-54F

DOI: 10.1016/j.compstruct.2010.01.012

Abstract (EN): A methodology for predicting accurately the propagation of delamination under mixed-mode fracture with cohesive elements is proposed. It is shown that changes in the local mode ratio during the evolution of damage under mixed-mode loading can cause errors in the determination of the energy dissipation and result in inaccurate predictions of the global load-displacement response - even under conditions where, according to Linear Elastic Fracture Mechanics, the global mode ratio is constant. To address this difficulty, relations between the interlaminar strengths and the penalty stiffness are proposed which ensure a correct energy dissipation when delamination propagates. The validity of the proposed methodology is demonstrated for different mode ratios by comparison with the corresponding analytical solutions.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8