A novel cohesive model for simulating delamination propagations in composite laminated structures

N. Hu, Y. Zemba, H. Fukunaga

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, we have proposed a new cohesive model to stably and accurately simulate delamination propagations in composite laminates under transverse loads. In this model, we set up a pre-softening zone in front of the original softening zone. In this pre-softening zone, the initial stiffness is gradually reduced as the interface strength decreases. However, the onset displacement for starting the real softening process is not changed in this model. The fracture toughness of materials for determining the final displacement of complete decohesion is not changed too. This cohesive model is implemented in the explicit time integration scheme for evaluating the delaminations. A DCB problem is employed to analyze the characteristics of the present cohesive model. Also, a stress-based criterion is adopted for predicting various in-plane damages, such as matrix cracks, fiber breakage etc. Moreover, two experimental examples of laminates under quasi-static and impact loads are employed to illustrate the validity of the present method.

Original languageEnglish
Title of host publicationProceedings of the 12th U.S.-Japan Conference on Composite Materials
Pages298-314
Number of pages17
Publication statusPublished - 2006 Dec 1
Event12th U.S.-Japan Conference on Composite Materials - Dearborn, MI, United States
Duration: 2006 Sep 212006 Sep 22

Other

Other12th U.S.-Japan Conference on Composite Materials
CountryUnited States
CityDearborn, MI
Period06/9/2106/9/22

ASJC Scopus subject areas

  • Ceramics and Composites

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