Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 30184
Using Stresses Obtained from a Low Detailed FE Model and Located at a Reference Point to Quickly Calculate the Free-edge Stress Intensity Factors of Bonded Joints

Authors: F. Maamar, M. Sartor

Abstract:

The present study focuses on methods allowing a convenient and quick calculation of the SIFs in order to predict the static adhesive strength of bonded joints. A new SIF calculation method is proposed, based on the stresses obtained from a FE model at a reference point located in the adhesive layer at equal distance of the free-edge and of the two interfaces. It is shown that, even limiting ourselves to the two main modes, i.e. the opening and the shearing modes, and using the values of the stresses resulting from a low detailed FE model, an efficient calculation of the peeling stress at adhesive-substrate corners can be obtained by this way. The proposed method is interesting in that it can be the basis of a prediction tool that will allow the designer to quickly evaluate the SIFs characterizing a particular application without developing a detailed analysis.

Keywords: Adhesive layer, bounded joints, free-edge corner, stress intensity factor.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1070311

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 836

References:


[1] D.B. Bogy, "Edge-bonded dissimilar orthogonal elastic wedges under normal and shear loading," in Journal of Applied Mechanics, vol. 35, pp. 460-466, 1968.
[2] D.B. Bogy, "On the problem of edge-bonded elastic quarter-planes loaded at the boundary," International Journal of Solids and Structures, vol. 6, pp. 1287-1313, 1970.
[3] Z.Q. Qian, "On the evaluation of wedge corner stress intensity factors of bi-material joints with surface tractions," Computers & Structures, vol. 79, pp. 53-64, 2001.
[4] Z.Q. Qian, and A.R. Akisanya, "Wedge corner stress behaviour of bonded dissimilar materials," Theoretical and Applied Fracture Mechanics, vol. 32, pp. 209-222, 1999.
[5] J. Dundurs, "Discussion of edge-bonded dissimilar orthogonal elastic wedges under normal and shear loading," Journal of Applied Mechanics, vol. 36, pp. 650-652, 1969.
[6] B.J. McAdams, and R.A. Pearson, "Studies on the disbanding initiation of interfacial cracks," Technical report n┬░ SAND2005-4749, DOI 10.2172/923175, Sandia National Laboratories, 2005.
[7] B.J. McAdams, and R.A. Pearson, "Application of critical stress intensity factors to evaluate adhesive failure at underfill /passivation interface singularities," 4th IEEE International Conference on Polymers and Adhesives in Microelectronics and Photonics, Polytronic 2004, pp. 27-32, 12-15 Sept. 2004.
[8] E.D. Reedy, Jr., "Intensity of the stress singularity at the interface corner between a bonded elastic and rigid layer," Engineering Fracture Mechanics, vol. 36, pp. 575-583, 1990.
[9] E.D. Reedy, Jr., and T.R. Guess, "Interface corner failure analysis of joint strength: Effect of a adherend stiffness," International Journal of Fracture, vol. 88, pp. 305-314, 1997.
[10] E.D. Reedy, Jr., "Free edge stress intensity factor for a bonded ductile layer subjected to shear," Journal of Applied Mechanics, Vol. 60, pp.715-720, 1993.
[11] C. De Chen, and C.H. Chue, "Singular stresses near apex of wedge by finite element analysis," Journal of The Chinese Institute of Engineers, vol. 26, No.4, pp. 423-434, 2003.
[12] C.H. Wang, and L.R.F. Rose, "Compact solutions for the corner singularity in bonded lap joint," International Journal of Adhesion and Adhesives, No.20, pp. 145-154, 2000.