Characterization of the translaminar cohesive law

Ortega Novillo, Adrián
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When a fibre-reinforced composite laminate is subjected to traction or compression, it develops a relatively large Fracture Process Zone where material toughening mechanisms such as matrix cracking, fibre-bridging and fibre pull-outs take place. The damage onset and damage propagation are well defined from a cohesive model point of view, although no standard procedure has been yet developed to characterize the translaminar Cohesive Law. The present Ph.D. thesis proposes an objective inverse method for obtaining the Cohesive Law from a single Compact Tension test. The proposed methodology has been correlated with numerical results, and has been satisfactorily used to characterize this property in various laminates, both in traction and compression ​
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