Definition of [±45°]ns specimen geometry to characterize CFRP non linear shear behavior in dynamic loading. (February 2022)

• Record Type: Journal Article
• Authors: Berton, Jordan; Coussa, Fabien; Berthe, Julien; Brieu, Mathias; Deletombe, Eric
• Is Part Of: Composites communications. Volume 30(2022)
• Publication Date: 2022-02
• Subjects: Carbon-fibers-reinforced polymers (CFRP) -- Shear -- Irreversible strain -- Damage
• DOI: 10.1016/j.coco.2022.101096
• Languages: English
• ISSNs: 2452-2139

Abstract

Abstract: The characterization of CFRP mechanical behavior under dynamic loading is an important topic for research laboratories. Literature reveals disparities in the evolution of shear behavior of CFRP materials under dynamic loading. Due to the lack of normative protocol for dynamic loading, these disparities can come from the geometry of the specimens used, which is generally reduced for dynamic testing. In this paper, the non-linear shear behavior of composite materials is characterized to analyze the effect of reduced geometry on the irreversible shear strain obtained compared to the reference geometry used for the quasi-static [ ± 45 ° ] n s tensile test. This recommendation is a first step in determining the pre-normative geometry of a [ ± 45 ° ] n s CFRP specimen adapted to dynamic loading Highlights: The thickness of a +/-45°CFRP specimen affect the macroscopic behavior The evaluation of the damage variable is dependent of the specimen geometry. The definition of a reduced geometry for the characterization of the nonlinear shear behavior of CFRP requires a large experimental study according to the expectations of the expected results.