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In this paper the strength of adhesive joint under tension and bending is discussed on the basis of intensity of singular stress by the application of FEM. A useful method is presented with focusing on the stress at the edge of interface between the adhesive and adherent obtained by FEM. After analyzing the adhesive joint strength with all material combinations, it is found that to improve the interface strength, thin adhesive layers are desirable because the intensity of singular stress decreases with decreasing the thickness., {"references":["S. Azari, M. Papini , J. K. Spelt, \"Effect of adhesive thickness on fatigue\nand fracture of toughened epoxy joints-part I: experiments\", Engineering\nFracture Mechanics, 78, pp.153-162,2011.","D. Hunston , Z. Miyagi , C. Schultheisz and S.Zaghi, \"The sandwich\nbending specimen for characterizing adhesive properties\", Mechanics of\nTime-Dependent Materials, 7, pp.71-88,2003.","D. B. Bogy, \"Edge-bonded dissimilar orthogonal elastic wedges under\nnormal and shear loading\", Journal of Applied Mechanics, vol. 35, pp.\n460-466, 1968.","D. B. Bogy, \"Two Edge-Bonded Elastic Wedges of Different and Wedge\nAngles under Surface Tractions\", Journal of Applied Mechanics, vol.\n38, pp. 377-386,1971.","D. H. Chen , H. Nisitani, \"Intensity of singular stress field near the\ninterface edge point of a bonded strip\", Transactions of Japan Society of\nMechanical Engineerings, A-59,567, pp.2682-2686,1993.","N. A. Noda, R. Shirao, J. Li, \"Sugimoto J S. Intensity of singular stress at\nthe end of a fiber under pull-out force\", International Journal of Solids\nand Structures, vol. 44, no.13, pp.4472-4491, 2007.","Y. Zhang, N. A .Noda, K. T .Takaisi, X. Lan, \"Effect of adhesive\nthickness on the intensity of singular stress at the adhesive dissimilar\njoint\", Journal of Solid Mechanics and Materials Engineering, vol.4,\nno.10, pp.1467-1479,2010.."]}

This paper discusses effects of adhesive thickness, overlap length and material combinations on the single-lap joints strength from the point of singular stress fields. A useful method calculating the ratio of intensity of singular stress is proposed using FEM for different adhesive thickness and overlap length. It is found that the intensity of singular stress increases with increasing adhesive thickness, and decreases with increasing overlap length. The increment and decrement are different depending on material combinations between adhesive and adherent., {"references":["Y.M. Jen, , C.W. Ko, \"Evaluations of fatigue life of adhesively bonded\naluminum single-lap joint using interfacial parameters\", International\nJournal of Fatigue, 32, pp.330-340,2010.","G. Li, P. Lee-Sullivan, R.W. Thring, \"Nolinear finite element analysis of\nstress and strain distributions across the adhesive thickness in composite\nsingle-lap joint\", Composite Structures,46, pp.395-403, 1999.","K.J. Lalit, Y.W. Mai, \"Analysis of resin-transfer-moulded single-lap\njoints\" ,Composites Science and Technology, 59, pp.1513-1518, 1999.","Z.M. Yan, M. You,_ X.S. Yi, X.L. Zheng, Z. Li, \" A numerical study of\nparallel slot in adherend on the stress distribution in adhesively bonded\naluminum single lap joint\", International Journal of Adhesion &\nAdhesives, 27, pp.687-695, 2007.","S.A.Hashim,\"Strengthofresin-coated-adhesive-bondeddoublelap-shearp\nultrusionjoints at ambient temperature\", International Journal of\nAdhesion & Adhesives, 29, pp.294-301, 2009.","R. Yuuki, Mechanics of interface, Baifuukan, 1993 (in Japanese).","D.H.Chen, H.Nisitani, \"Singular stress field in two bonded wedges\", The\nJapan Society of Mechanical Engineers, vol.58, no.547 pp.457´╝ì464,\n1992.","D. Munz, Y.Y. Yang, \"Stresses near the edge of bonded dissimilar\nmaterials described by two stress intensity factors\", International\nJournal of Fracture, 60, pp. 169-177, 1993.","M. Imanakaa, K. Ishiib, H. Nakayamac, \"Evaluation of fatigue strength\nof adhesively bonded single and single step double lap joints based on\nstress singularity parameters\", Engineering Fracture Mechanics, 62,\npp.409-424, 1999.\n[10] T. Hattori, S. Sakata, T. Hatsuda, G. Murakami, \"A stress singularity\nparameter approach for evaluating adhesive strength\", The Japan Society\nof Mechanical Engineers, 31, pp.718-723,1988.\n[11] T. Hattori. \"A stress-singularity-parameter approach for evaluating the\nadhesive strength of single-lap joints\", The Japan Society of Mechanical\nEngineers, 34, pp.326-331, 1991.\n[12] A. Barroso, V. Mantic, F. Paris , \"Singularity parameter determination in\nadhesively bonded lap joints for use in failure criteria\",Composites\nScience and Technology, 68, pp.2671-2677, 2008.\n[13] P.N.B. Reis, F.J.V. Antunes, J.A.M. Ferreira, \"Influence of superposition\nlength on mechanical resistance of single-lap adhesive joints\",\nComposite Structures, 67, pp.125-133, 2005."]}

This report comprises a collection of all but one of the contributions made bythe participants in the Post CSI Symposium. In the first part of this Symposium,KFA staff presented a survey of analysis and special spectroscopic investigationsbeing carried out in the KFA. Several participants prepared presentationsconcerning their own spectroscopy activities.The contributions dealt partly with the development and advances in differentspectroscopic techniques used in recent years in the iron and steel industryand in the investigations of graphitic, ceramic and geological materials. Ofparticular interest are the ICP methods and trace element analysis. In someof the presentations, various spectroscopic methods for analysis were appliedand compared. One contribution dealt specifically with the preparations ofspecimens of matertals that are difficult to dissolve. High temperature massspectrometry was of special interest. The services offered by the ChemicalAnalysis Department (ZCH) of the KFA were presented; a variety of spectroscopictechniques for chemical analysis of materials was outlined in this contribution.