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Author:

Fan, Xueling (Fan, Xueling.) | Sun, Qin (Sun, Qin.)

Indexed by:

CPCI-S EI Scopus

Abstract:

The superposition-finite element method is developed to analyze the mixed-mode delamination in laminated composites. Both a coarse global mesh and an overlaying fine local mesh are integrated into the finite element analysis model. The whole design domain is discretized by a uniform global mesh, while the high stress regions are discretized by fine local meshes. Local mesh is built independently from the global mesh, which greatly simplifies the model generation procedures. Strain energy release rate is calculated based on the modified virtual crack closure-integral method, which is used to describe the propagation of delamination in laminated composites. Mixed-mode bending tests are performed for unidirectional and cross-ply carbon fiber reinforced laminated composites to characterize the interlaminar fracture behavior under mixed-mode I/II loading conditions. The interlaminar fracture toughness is also given for different mixed-mode ratio. It is seen that fracture resistance for laminated composites exhibit R-curve behavior (increase as delamination propagation). However, once the delamination is sufficiently long, the interfacial fracture toughness changes slightly as the delamination extended and become almost independent of the delamination length. The results of finite element method are in good agreement with the experimental results and provides a basis for establishing failure criterion used in damage tolerance analysis of composite structures.

Keyword:

delamination energy release rate fracture toughness mixed-mode virtual crack closure-integral method

Author Community:

  • [ 1 ] [Fan, Xueling] Xi An Jiao Tong Univ, Sch Aerosp, Xian 710049, Peoples R China
  • [ 2 ] [Sun, Qin] Northwestern Polytech Univ, Sch Astronauti, Xian, Peoples R China

Reprint Author's Address:

  • Xi An Jiao Tong Univ, Sch Aerosp, Xian 710049, Peoples R China.

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Source :

MECHANICAL AND AEROSPACE ENGINEERING, PTS 1-7

ISSN: 1660-9336

Year: 2012

Volume: 110-116

Page: 1345-+

Language: English

Cited Count:

WoS CC Cited Count: 0

SCOPUS Cited Count: 3

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 10

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