Abstract
Measurements of interface bonding strengths are necessary for predicting the failure behavior of structures and materials with bi-material interfaces. However, it is well known that due to the discontinuity of material properties, stress singularity may exist at the edges of the interface. For accurate determination of the bonding strength of bi-material interface, the elimination of the stress singularity is necessary. This paper presents an analytical solution for the determination of the stress singularity and the critical bonding angle of a bonded joint between elastic and viscoelastic materials. This solution is based on the analytical solution available for an elastic–elastic bonded joint via the elastic–viscoelastic corresponding principle. For the viscoelastic material, both time-independent and time-dependent Poisson’s ratios are considered to find its effect on the stress singularity. As an example, the developed solution is applied to a simulated aluminum-epoxy bonded joint with a spherical interface. It is found that the critical bonding angle and the order of the stress singularity are different for assuming a time-independent or time-dependent Poisson’s ratio of the idealized viscoelastic epoxy. With the analytical solution developed, it is possible to design an optimal interface geometry that can eliminate the stress singularity from the interface corner.
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References
Akisanya, A.R., Fleck, N.A.: Interfacial cracking from the free-edge of a long bi-material strip. Int. J. Solids Struct. 34(13), 1645–1665 (1997)
Aksentian, O.K.: Singularities of the stress-strain state of a plate in the neighborhood of an edge. Prikl. Mat. Meh. 31, 78–186 (1967)
ASTM D3165: Standard test method for strength properties of adhesives in shear by tension loading of single-lap-joint laminated assemblies. ASTM International, West Conshohocken, PA (2007)
ASTM D2095: Standard test method for tensile strength of adhesives by means of bar and rod specimens. ASTM International, West Conshohocken, PA (2008)
Bogy, D.B.: Edge-bonded dissimilar orthogonal elastic wedges under normal and shear loading. J. Appl. Mech. 35, 460–466 (1968)
Bogy, D.B.: Two edge-bonded elastic wedges of different materials and wedge angles under surface tractions. J. Appl. Mech. 38, 377–386 (1971)
Bogy, D.B., Wang, K.C.: Stress singularities at interface corners in bonded dissimilar isotropic elastic materials. Int. J. Solids Struct. 7, 993–1005 (1971)
Bowen, J.M., Knauss, W.G.: An experimental study of interfacial crack kinking. Exp. Mech. 33(1), 37–43 (1993)
Christensen, R.M.: Theory of Viscoelasticity—An Introduction, 2nd edn. Academic Press, New York (1982)
Delale, F., Erdogan, F.: Viscoelastic analysis of adhesively bonded joints. J. Appl. Mech. 48, 331–338 (1981)
Dempsey, J.P., Sinclair, G.B.: On the singular behavior at the vertex of a bi-material wedge. J. Elast. 11, 317–327 (1981)
Deng, T.H., Knauss, W.G.: The temperature and frequency dependence of the bulk compliance of poly (vinyl acetate): a re-examination. Mech. Time-Depend. Mater. 1, 33–49 (1997)
Dundurs, J.: Discussion. J. Appl. Mech. 36, 650–652 (1969)
England, A.H.: On stress singularities in linear elasticity. Int. J. Eng. Sci. 9, 571–585 (1971)
Fung, Y.C.: Introductions to Solid Mechanics. Prentice Hall, New Jersey (1965)
Geubelle, P.H., Knauss, W.G.: Finite strains at the tip of a crack in a sheet of hyperelastic material: II. Special bi-material cases. J. Elast. 35(1–3), 99–137 (1994)
Geubelle, P.H., Knauss, W.G.: Crack propagation in homogeneous and bi-material sheets under general in-plane loading: nonlinear analysis. J. Appl. Mech. 62(3), 601–606 (1995)
Goglio, L., Rossetto, M.: Stress intensity factor in bonded joints: influence of the geometry. Int. J. Adhes. Adhes. 30, 313–321 (2010)
Han, X., Ellyin, F., Xia, Z.: Interface crack between two different viscoelastic media. Int. J. Solids Struct. 38, 7981–7997 (2001)
Hein, V.L., Erdogan, F.: Stress singularities in a two-material wedge. Int. J. Fract. Mech. 7, 317–330 (1971)
Jerabek, M., Tscharnuter, D., Major, Z., Ravi-Chandar, K., Lang, R.W.: Relaxation behavior of neat and particulate filled polypropylene in uniaxial and multiaxial compression. Mech. Time-Depend. Mater. 14(1), 47–68 (2010a)
Jerabek, M., Major, Z., Lang, R.W.: Strain determination of polymeric materials using digital image correlation. Polym. Test. 29(3), 407–416 (2010b)
Kelly, P.A., Hills, D.A., Nowell, D.: The design of joints between elastically dissimilar components (with special reference to ceramic metal joints). J. Strain Anal. Eng. Des. 27, 15–20 (1992)
Knauss, W.G.: Fracture mechanics and the time-dependent strength of adhesive joints. J. Compos. Mater. 5, 176–191 (1971)
Lauke, B.: Stress concentration along curved interfaces as basis for adhesion tests. Compos. Interfaces 14, 307–320 (2007)
Lauke, B., Schüller, T., Schneider, K.: Determination of interface strength between two polymer materials by a new curved interface tensile test. Compos. Interfaces 10, 1–15 (2003)
Lee, E.H.: Stress analysis in viscoelastic bodies. Brown University, TR No. 8, Nord 11446 (1954)
Lee, E.H.: Stress analysis of viscoelastic bodies. Q. J. Mech. Appl. Math. 13, 183–190 (1955)
Lee, S.S.: Free-edge stress singularity in a two-dimensional unidirectional viscoelastic laminate model. J. Appl. Mech. 64, 408–414 (1997)
Li, Y.L., Hu, S.Y., Yang, Y.Y.: Stresses around the bond edges of axisymmetric deformation joints. Eng. Fract. Mech. 66, 153–170 (2000)
Munz, D., Yang, Y.Y.: Stress singularities at the interface in bonded dissimilar materials under mechanical and thermal loading. J. Appl. Mech. 59, 857–862 (1992)
Perlman, A.B., Sih, G.C.: Elastostatic problems of curvilinear cracks in bonded dissimilar materials. Int. J. Eng. Sci. 5, 845–867 (1967)
Qian, Z.Q., Akisanya, A.R.: An investigation of the stress singularity near the free edge of scarf joint. Eur. J. Mech. A, Solids 18, 443–463 (1999)
Qian, Z.Q., Akisanya, A.R., Imbabi, M.S.: Edge effects in the failure of elastic/viscoelastic joints subjected to surface tractions. Int. J. Solids Struct. 37, 5973–5994 (2000)
Qvale, D., Ravi-Chandar, K.: Viscoelastic characterization of polymers under multiaxial compression. Mech. Time-Depend. Mater. 8(3), 193–214 (2004)
Reedy, E.D.: Intensity of the stress singularity at the interface corner between a bonded elastic and rigid layer. Eng. Fract. Mech. 36, 575–583 (1990)
Reedy, E.D.: Free edge stress intensity factor for a bonded ductile layer subjected to shear. J. Appl. Mech. 60, 715–720 (1993a)
Reedy, E.D.: Asymptotic interface corner solutions for butt tensile joints. Int. J. Solids Struct. 30, 767–777 (1993b)
Schapary, R.A.: Approximate methods of transform inversion for viscoelastic stress analysis. In: Proc. 4th US Nat. Gong. Appl. Mech., vol. 2, pp. 1075–1085 (1962)
Schiff, J.L.: The Laplace Transform-Theory and Applications. Springer, New York (1999)
Schmauder, S.: Influence of elastic anisotropy on the edge problem. Met. Ceram. Interfaces 4, 413–419 (1989)
Schneider, K., Lauke, B., Schüller, T.: Determination of the interface strength between two polymer materials by a new curved interface tensile test: preliminary experimental results. Compos. Interfaces 10, 581–591 (2003)
Stenger, F., Chaudhuri, R., Chiu, J.: A novel sinc solution of the boundary integral form for two-dimensional bi-material elasticity problems. Compos. Sci. Technol. 60, 2197–2211 (2000)
Theocaris, P.S.: The order of singularity at a multi-wedge corner of a composite plate. Int. J. Eng. Sci. 12, 107–120 (1974)
Tscharnuter, D., Jerabek, M., Major, Z., Lang, R.W.: Time-dependent Poisson’s ratio of polypropylene compounds for various strain histories. Mech. Time-Depend. Mater. 15(1), 15–28 (2011)
Tschoegl, N.W., Knauss, W., Emri, I.: Poisson’s ratio in linear viscoelasticity—a critical review. Mech. Time-Depend. Mater. 6(1), 3–51 (2002)
Wang, P., Xu, L.R.: Convex interfacial joints with least stress singularities in dissimilar materials. Mech. Mater. 38, 1001–1011 (2006)
Williams, M.L.: Stress singularities resulting from various boundary conditions in angular corners of plates in extension. J. Appl. Mech. 19, 526–528 (1952)
Wu, Z.X.: Design free of stress singularities for bi-material components. Compos. Struct. 65, 339–345 (2004)
Xia, Z., Chowdhuri, M.A.K., Ju, F.: A new test method for the measurement of normal-shear bonding strength at bi-material interface. Mech. Adv. Mat. Struct. (2011, accepted)
Xu, K.: Experimental study on biaxial normal-shear interface bonding strength between E-glass and epoxy polymer. M.Sc. Thesis, University of Alberta, Canada (2006)
Yadagiri, S., Reddy, C.P., Reddy, T.S.: Viscoelastic analysis of adhesively bonded joints. Comput. Struct. 27, 445–454 (1987)
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The research is supported by the Natural Sciences and Engineering Research Council of Canada (NSERC) through a research grant to Z. Xia.
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Chowdhuri, M.A.K., Xia, Z. An analytical model to determine the stress singularity and critical bonding angle for an elastic–viscoelastic bonded joint. Mech Time-Depend Mater 16, 343–359 (2012). https://doi.org/10.1007/s11043-011-9166-5
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DOI: https://doi.org/10.1007/s11043-011-9166-5