Mixed-mode fracture analyses of plastically-deforming adhesive joints

A mode-dependent embedded-process-zone (EPZ) model has been developed and used to simulate the mixed-mode fracture of plastically deforming adhesive joints. Mode-I and mode-II fracture parameters obtained from previous work have been combined with a mixed-mode failure criterion to provide quantitative predictions of the deformation and fracture of mixed-mode geometries. These numerical calculations have been shown to provide excellent quantitative predictions for two geometries that undergo large-scale plastic deformation: asymmetric T-peel specimens and single lap-shear joints. Details of the deformed shapes, loads, displacements and crack propagation have all been captured reasonably well by the calculations.

[1]  John W. Hutchinson,et al.  Interface strength, work of adhesion and plasticity in the peel test , 1998 .

[2]  Zhigang Suo,et al.  Experimental determination of interfacial toughness curves using Brazil-nut-sandwiches , 1990 .

[3]  John Morton,et al.  Improved theoretical solutions for adhesive lap joints , 1998 .

[4]  J. Hutchinson,et al.  Nonlinear delamination mechanics for thin films , 1997 .

[5]  J. K. Spelt,et al.  The effect of geometry on the fracture of adhesive joints , 1994 .

[6]  Z. Suo,et al.  Mixed mode cracking in layered materials , 1991 .

[7]  M. D. Thouless,et al.  Elastic–plastic mode-II fracture of adhesive joints , 2001 .

[8]  L. Tong,et al.  Bond strength for adhesive-bonded single-lap joints , 1996 .

[9]  H. Chai.  Shear fracture , 1988, International Journal of Fracture.

[10]  M. D. Thouless,et al.  Analysis of the Symmetrical 90°-peel Test with Extensive Plastic Deformation , 2000 .

[11]  J. Harris,et al.  Strength prediction of bonded single lap joints by non-linear finite element methods , 1984 .

[12]  J. Comyn,et al.  Structural Adhesive Joints in Engineering , 1984, The Aeronautical Journal (1968).

[13]  J. Hutchinson,et al.  The influence of plasticity on mixed mode interface toughness , 1993 .

[14]  M. D. Thouless,et al.  Numerical simulations of adhesively-bonded beams failing with extensive plastic deformation , 1999 .

[15]  Viggo Tvergaard,et al.  On the toughness of ductile adhesive joints , 1996 .

[16]  Anthony J. Kinloch,et al.  Developments in adhesives , 1977 .

[17]  A. Crocombe,et al.  Development of a full elasto-plastic adhesive joint design analysis , 1992 .

[18]  A. D. Crocombe,et al.  Non-linear adhesive bonded joint design analyses , 1990 .

[19]  Jan K. Spelt,et al.  Fracture load predictions for adhesive joints , 1994 .