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Numerical modelling of lap joints bonded with a rate-dependent adhesive

โœ Scribed by M. Zgoul; A.D. Crocombe


Publisher
Elsevier Science
Year
2004
Tongue
English
Weight
587 KB
Volume
24
Category
Article
ISSN
0143-7496

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โœฆ Synopsis


This work focuses on modelling the rate-dependent response of adhesively bonded structures. An experimental study undertaken in parallel with this has provided material data defining both the tensile and shear response of the adhesive system. In addition, instrumented data for a range of single lap joints was also available. Three different rate-dependent material models have been assessed as part of this work. Whilst the rate-dependent von Mises material model was easiest to implement, it was found that it could not model the shear data using the tensile data due to hydrostatic stress sensitivity in the adhesive. Difficulty was experienced in obtaining a converged solution for the rate-dependent hydrostatic stress-sensitive material model provided by ABAQUS. However, an overstress-based visco-plastic model developed in a previous programme was able to model both the tensile and shear data correctly. Two of these models were then used to simulate the various single lap joints tested and it appeared that the von Mises model gave closer predictions than the visco-plastic model. A possible reason for this was damage within the joint that was not modelled but this aspect was not pursued. Finally, it was shown that a rate-independent strain-based failure criterion appeared to give good predictions of joint strength in most of the configurations considered.


๐Ÿ“œ SIMILAR VOLUMES


Strain energy release rate determination
โœ Chihdar Yang; Alireza Chadegani; John S. Tomblin ๐Ÿ“‚ Article ๐Ÿ“… 2008 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 633 KB

An analytical model for determining the strain energy release rate due to a prescribed crack in an adhesively-bonded, single-lap composite joint with thick bondlines and subjected to axial tension is presented. An existing analytical model for determining the adhesive stresses within the joint is us