Development of a mixed mode double cantilever beam specimen for the fracture characterization of adhesives under high displacement rate. (1st February 2021)

• Record Type: Journal Article
• Authors: Dagorn, Noëlig; Portemont, Gérald; Berthe, Julien; Rasselet, François; Bourel, Benjamin; Lauro, Franck
• Is Part Of: Engineering fracture mechanics. Volume 242(2021)
• Publication Date: 2021-02-01
• Subjects: Adhesive joint -- Dynamic loading -- Mixed mode -- Fracture toughness -- Beam theory; Fracture mechanics -- Periodicals; Rupture, Mécanique de la -- Périodiques; Fracture mechanics; Periodicals; 620.112605
• DOI: 10.1016/j.engfracmech.2020.107467
• Languages: English
• ISSNs: 0013-7944

Abstract

Abstract: In this paper, a new specimen called mixed mode double cantilever beam (MMDCB) was developed for the mixed mode fracture characterization of adhesives under high displacement rates. The MMDCB specimen was designed using finite elements simulations in order to determine the fracture toughness for a mode mixity in the plane I+II+III. Firstly, results from MMDCB specimens tested under quasi-static loading were experimentally compared to a reference single leg bending test. The test results, obtained with the two different specimens, exhibit consistent evaluations of the mixed mode fracture toughness. Secondly, the MMDCB specimen testing under asymmetric high displacement rate was validated through explicit simulations. The corrected beam theory with effective crack length was extended to the analysis of MMDCB specimens tested under high displacement rate. It was numerically proved to accurately determine the mixed mode fracture toughness under a displacement rate up to 1 m/s. Highlights: A new MMDCB test allows the evaluation of the fracture toughness under mixed mode. The fracture toughness is identic under mixed mode I+II and I+III for one shear ratio. Numerical validation of the MMDCB test under mixed mode dynamic loading up to 1 m/s.