Dissimilar Materials Joint and Effect of Angle Junction on Stress Distribution at Interface

in dissimilar material joints, failure often occurs along the interface between two materials due to stress singularity. Stress distribution and its concentration depend on materials and geometry of the junction. Inhomogenity of stress distribution at the interface of junction of two materials with different elastic modules and stress concentration in this zone are the main factors resulting in rupture of the junction. Effect of joining angle in the interface of aluminum-polycarbonate will be discussed in this paper. Computer simulation and finite element analysis by ABAQUS showed that convex interfacial joint leads to stress reduction at junction corners in compare with straight joint. This finding is confirmed by photoelastic experimental results.




References:
[1] D.B. Bogy, Edge-bonded dissimilar orthogonal elastic wedges under
normal and shear loading, J. Appl. Mech. 35 (1968) 460-466.
[2] D.B. Bogy, Two edge-bonded elastic wedges of different materials and
wedge angles under surface tractions, J. Appl. Mech. 38 (1971) 377-386.
[3] V.L. Hein, F. Erdogan, Stress singularities in a two-material wedge, Int.
J. Fracture Mech. 7 (1971) 317-330.
[4] A.H. England, On stress singularities in linear elasticity. Int. J. Engng.
Sci. 9 (1971) 571-585.
[5] P.S. Theocaris, The order of singularity at a multi-wedge corner in a
composite strip, Int. J. Engng. Sci. 12 (1974) 102-120.
[6] H.L. Groth, Stress singularities and fracture at interface corners in
bonded joints, Int. J. Adhesion Adhesive 8 (1988) 107-113.
[7] E.D. Reedy, Intensity of the stress singularity at the interface-corner
between a bonded elastic and rigid layer, Engng. Fracture Mech. 36
(1990) 575-583.
[8] P.A. Kelly, D.A. Hills, D. Nowell, The design of joints between
elasticity dissimilar components (with special reference to ceramic/metal
joints), J. Strain Analysis 27 (1992) 15-20.
[9] D. Munz, Y.Y. Yang, Stresses singularities at the interface in bonded
dissimilar materials under mechanical and thermal loading, J. Appl.
Mech. 59 (1992) 857-861.
[10] S. Ding, M. Kumosa, Singular stress behavior at adhesive interface
corner, Engng. Fracture Mech. 47 (1994) 503-519.
[11] H. Koguchi, T. Inoue, T. Yada, Stress singularity in three-phase bonded
structure, J. Appl. Mech. 63 (1996) 252-258.
[12] A.R. Akisanya, On the singular stress near the edge of bonded joints, J.
Strain Analysis 32 (1997) 301-311.
[13] E.D. Reedy, T.R. Guess, Comparison of Butt Tensile Strength Data with
Interface Corner Stress Intensity Factor Prediction, Int. J. Solids and
Structures 30 (1993) 2929-2936.
[14] G.P. Tandon, R.Y. Kim, S.G. Warrier, B.S. Majumdar, Influence of Free
Edge and Corner Singularities on Interfacial Normal Strength:
Application in Model Unidirectional Composites, Composites 30 (1999)
115-134.
[15] A.R. Akisanya, N.A. Fleck, Interfacial Cracking from the Free Edge of a
Long Bi-material Strip, Int. J. Solids and Structures 34 (1997) 1645-
1665.
[16] J.G. Swadener, K.M. Liechti, A.L. Lozanne, The Intrinsic Toughness
and Adhesion of a Glass Epoxy Interface, J. Mechanics and Physics of
Solids 47 (1999) 223-258.
[17] L.R. Xu, H. Kuai, S. Sengupta, Dissimilar Material Joints with and
without Free-edge Stress Singularities, Part I. A Biologically Inspired
Design, Experimental Mechanics 44 (2004) 608-615.
[18] D.B. Bogy, Two edge-bonded elastic wedges of different materials and
wedge angles under surface traction, J. Applied Mechanics 38 (1971)
377-386.
[19] J. Dundurs, Discussion on edge-bonded dissimilar orthogonal elastic
wedges under normal and shear loading, J. Applied Mechanics 36 (1969)
650-652.
[20] I. Mohammed, K.M. Liechti, The effect of corner angles in bimaterial
structures, Int. J. Solids and Structures 38 (2001) 4375-4394.
[21] J.W. Hutchinson, Z. Suo, Mixed mode cracking in layered materials,
Advances inApplied Mechanics 29 (1992) 63-191.G. O. Young,
"Synthetic structure of industrial plastics (Book style with paper title and
editor)," in Plastics, 2nd ed. vol. 3, J. Peters, Ed. New York: McGraw-
Hill, 1964, pp. 15-64.