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Numerical investigations in structures with imperfect material interfaces and cracks
Author(s) -
Judt Paul,
Ricoeur Andreas
Publication year - 2016
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201610060
Subject(s) - imperfect , materials science , fracture (geology) , composite material , fiber , reduction (mathematics) , structural engineering , composite number , matrix (chemical analysis) , engineering , philosophy , linguistics , geometry , mathematics
Natural fiber reinforced bio‐polymers are in the focus of many research projects to understand and improve the mechanical behavior subjected to different process parameters during production. To provide safe and reliable light weight constructions, special interest is directed towards the damage and fracture behavior of such composite materials. Here, the material's behavior at the imperfect material interface between fiber and matrix plays an essential role and governs inelastic effects at the interfaces on the one hand, and the behavior of growing cracks on the other. The reduction of the elastic potential is related to both energy consuming processes in the system and in general is going along with a reduction of the crack tip loading and a shift of the crack growth direction. In this paper, the crack tip loading analysis in structures with perfect and imperfect material interfaces is presented and applied to different specimens. (© 2016 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)