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Design procedures for adhesive joints can be improved by developing mathematical models to predict joint strength and stiffness, thus improving the availability of material data and gaining an understanding of joint behaviour under creep, fatigue and impact loadings. Two computer programs were developed. One allows prediction of stresses and strains to be calculated in a variety of adhesive bond geometries and takes account of non-linear material behaviour in both the adhesive and adherend. The other enables generation of a stiffness matrix for an adhesive bond element for inclusion in finite element models of large bonded structures. Methods of determining adhesive tensile properties were studied and a relatively new technique called laser moiré interferometry used to validate the computer codes and study the accumulation of strain in adhesive joints under static and low frequency loadings. The possibility of characterising the low temperature impact performance of adhesive joints through the use of Dynamic Mechanical Analysis was also investigated. Three components involving the use of adhesive jointing were made and tested to focus the theoretical work of the program on to real applications.

Additional information

Authors: MCCARTHY J C, Harwell, Materials Engineering Centre, Oxfordshire (GB);GUDGE M J, Harwell, Materials Engineering Centre, Oxfordshire (GB);DAVIDSON R, Harwell, Materials Engineering Centre, Oxfordshire (GB);LEE R J, Harwell, Materials Engineering Centre, Oxfordshire (GB)
Bibliographic Reference: EUR 12468 EN (1990) 20 pp., MF, ECU 4, blow-up copy ECU 5
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