Linear elastic analysis of the loading rate dependency of the fracture properties of structural adhesives in the mixed mode I+II plane. (15th February 2020)

• Record Type: Journal Article
• Authors: Stamoulis, G.; Carrere, N.
• Is Part Of: Engineering fracture mechanics. Volume 225(2020)
• Publication Date: 2020-02-15
• Subjects: Fracture energy -- Loading rate -- Linear elastic fracture mechanics -- Finite elements -- Fracture envelope; Fracture mechanics -- Periodicals; Rupture, Mécanique de la -- Périodiques; Fracture mechanics; Periodicals; 620.112605
• DOI: 10.1016/j.engfracmech.2019.106840
• Languages: English
• ISSNs: 0013-7944

Abstract

Highlights: Influence of the loading speed on the fracture properties of structural adhesives. Experimental setups to perform the TDCB and MMB bonding operations. Fracture envelope follows the Benzeggagh-Kenane failure criterion. Increasing the loading speed influences the fracture results when close to mode II. Discussion on the relevance of the LEFM approach. Abstract: In this paper, the fracture properties of a structural adhesive are investigated via the Tapered Double Cantilever Beam (TDCB) and the Mixed Mode Bending (MMB) tests. The experiments were performed at low to fairly low loading rates. The results were analyzed using Linear Elastic Fracture Mechanics (LEFM). It is shown that the testing speed has considerable impact on the fracture behaviour when close to mode II. Nonetheless, TDCB and MMB Load-Unload tests revealed significant non-linearities. Arcan tests demonstrated the important sensibility of the adhesive material properties to the strain rate. Therefore, the relevance of the LEFM approach is also discussed.