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Transcript of Idemi_2013
predict the structure toughness
joint mechanical behavior
strain energy release rate
in mode I , mode II and mixed-mode I+ II
determination of the strain energy release rate in mode I , mode II and mixed-mode I+ II
the development of the testing apparatus benefited of a design methodology based in numerical simulation using Finite Element Analysis;
validation prior to manufacture, avoided errors and allowed the optimization of materials and parts geometry;
while at the simulation stage a data reduction scheme that improves the efficiency of the test was also developed benefiting of the same design methodology;
this data reduction scheme was first validated recurring to numerical results and later used to analyse experimental data with good results;
the apparatus was manufactured and used to obtain experimental results confirming its adequacy and novelty for the adhesive joints mixed-mode evaluation allowing to validate the data reduction scheme and obtain a full fracture envelope.
the authors would like to thank the “Fundação Luso-Americana para o Desenvolvimento” (FLAD) for the support through project 314/06, 2007 and Instituto de Engenharia Mecânica (IDMEC).
we also would like to acknowledge the support provided to Virginia Tech by the National Science Foundation (DMR NSF 0415840) in the development of a dual actuator load frame capable of facilitating mixed mode fracture studies
Fernlund, G. and J. K. Spelt (1994). Composites Science and Technology 50(4): 441-449.
Chaves et al., Engineering Fracture Mechanics. 2013, Vol. 107, pp. 38–47
Chaves et al., International Journal of Solids and Structures 48 (2011) 1572–1578