On Delamination Growth in Shallow Shells

[+] Author and Article Information
B. Storåkers, P.-L. Larsson, C. Rohart

Department of Solid Mechanics, Royal Institute of Technology (KTH), SE-100 44 Stockholm, Sweden

J. Appl. Mech 71(2), 247-254 (May 05, 2004) (8 pages) doi:10.1115/1.1668122 History: Received December 16, 2002; Revised September 19, 2003; Online May 05, 2004
Copyright © 2004 by ASME
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Grahic Jump Location
Geometry of the problem. (a) General view. (b) Section view at the plane x=0.
Grahic Jump Location
Measured fracture toughness as function of mode mixity for a unidirectional layup of carbon/epoxy 6376C/HTA7. Experimental results by Ljung 36.
Grahic Jump Location
(a) Finite element mesh for a circular delamination with local crack advance indicated. (b) Complete finite element mesh.
Grahic Jump Location
Local maximum (s=1) of the energy release rate Ḡ as function of the external load ε̄0
Grahic Jump Location
Variation of the energy release rate Ḡ along the delamination front s at ε̄0=1, 2
Grahic Jump Location
Stress intensity factors, K̄I,K̄II, along the delamination front s at ε̄0=2
Grahic Jump Location
Mode mixity variation along the delamination front s at ε̄0=1, 2, Z=1
Grahic Jump Location
Variation of the energy release rate Ḡ along the delamination front s at ε̄0=2,Z=1. (–), prior to crack advance. ([[dashed_line]]), after crack advance. The perturbed crack contour is also sketched.
Grahic Jump Location
Local maximum (s=1) of the energy release rate Ḡ as function of the external load ε̃0
Grahic Jump Location
Variation of the energy release rate Ḡ along the delamination front s at ε̄0=1.0, 1.1 and Z=0.1, 0.5
Grahic Jump Location
Limits for contact as function of the external load ε̃0 and the geometry parameter Z, (–) by the condition KI=0, ([[dashed_line]]) by the condition w(a,0)=0
Grahic Jump Location
Stress intensity factors K̄I,K̄II as function of the external load ε̃0. (a) Z=0.1. (b) Z=0.5.
Grahic Jump Location
Hatched region of contact at ε̃0≈2,Z=1



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