Single lap joints loaded in tension with high strength steel adherends

Abstract Single lap joints in many different geometric and material configurations were analysed using finite element analysis and tested in tension. Geometric parameters, such as the overlap length and adherend thickness, together with material parameters such as the adherend and adhesive stress–strain behaviour, were all tested. The mechanisms and modes of failure were observed for different cases, and positions of damage initiation were identified. Failure patterns were related to failure mechanisms. A failure prediction methodology has been proposed and a good correlation was obtained between the experimental and finite element predictions of strength for a variety of joint configurations. The study is presented in two parts. In the first (present paper), high strength steel adherends are considered and in the second paper ductile steel adherends are studied. For high strength steel adherends and a relatively short overlap, failure is dominated by adhesive global yielding. As the overlap gets longer, however, failure is no longer due to global yielding, but due to high local shear strains.

[1]  Robert D. Adams,et al.  Stress analysis of adhesive-bonded lap joints , 1974 .

[2]  J. D. Clark,et al.  Ultimate Tensile Stress over a Zone: A New Failure Criterion for Adhesive Joints , 1993 .

[3]  A. C. Roulin-moloney.  Fractography and failure mechanisms of polymers and composites , 1989 .

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

[5]  D. Purslow.  Matrix fractography of fibre-reinforced epoxy composites , 1986 .

[6]  Lutz Dorn,et al.  The stress state and failure properties of adhesive-bonded plastic/metal joints , 1993 .

[7]  Robert D. Adams,et al.  Experimental and numerical analysis of single-lap joints for the automotive industry , 2009 .

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

[9]  R. Adams,et al.  Single Lap Joints with Rounded Adherend Corners: Experimental Results and Strength Prediction , 2011 .

[10]  M. Banea,et al.  Modelling of Single-Lap Joints Using Cohesive Zone Models: Effect of the Cohesive Parameters on the Output of the Simulations , 2012 .

[11]  Robert D. Adams,et al.  Strength of Joints Involving Composites , 1996 .

[12]  R. S. Raghava,et al.  The macroscopic yield behaviour of polymers , 1973 .

[13]  R. Adams,et al.  Single Lap Joints with Rounded Adherend Corners: Stress and Strain Analysis , 2011 .

[14]  A. Kinloch,et al.  Particle cavitation in rubber toughened epoxies: the role of particle size , 2010 .

[15]  Robert D. Adams,et al.  An Elasto-Plastic Investigation of the Peel Test , 1982 .

[16]  Wolfgang G. Knauss,et al.  The role of damage-softened material behavior in the fracture of composites and adhesives , 1987 .

[17]  Robert D. Adams,et al.  Single lap joints loaded in tension with ductile steel adherends , 2013 .

[18]  R. S. Raghava,et al.  A macroscopic yield criterion for crystalline polymers , 1973 .

[19]  Robert D. Adams,et al.  Influence of the Spew Fillet and other Parameters on the Stress Distribution in the Single Lap Joint , 1981 .

[20]  J. Hutchinson,et al.  The relation between crack growth resistance and fracture process parameters in elastic-plastic solids , 1992 .

[21]  Wing Kong Chiu,et al.  A numerical study of adhesively bonded lap joints , 1992 .

[22]  S. S. Wang,et al.  Micromechanics of Fracture in Structural Adhesive Bonds , 1989 .

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

[24]  L. F. Silva,et al.  Measurement of the mechanical properties of structural adhesives in tension and shear over a wide range of temperatures , 2005 .

[25]  A. D. Crocombe,et al.  Global yielding as a failure criterion for bonded joints , 1989 .

[26]  A. Needleman.  A Continuum Model for Void Nucleation by Inclusion Debonding , 1987 .

[27]  Y. Mai,et al.  Substrate constraint and adhesive thickness effects on fracture toughness of adhesive joints , 2004 .