Assessment of I/II fracture toughness of new magnetically guided stainless steel particle toughened carbon/epoxy composites. (November 2022)

• Record Type: Journal Article
• Authors: Zhang, Nan; Zhang, Yao; Cai, Deng'an; Hu, Yanpeng; Zhou, Guangming
• Is Part Of: Thin-walled structures. Volume 180(2022)
• Publication Date: 2022-11
• Subjects: Magnetic guidance -- Particle toughening -- Fracture toughness -- Interface parameters -- Carbon/epoxy composites; Thin-walled structures -- Periodicals; 690.1
• DOI: 10.1016/j.tws.2022.109842
• Languages: English
• ISSNs: 0263-8231

Abstract

Abstract: In this paper, a new kind composite, called the magnetically guided stainless steel particle toughened composite, is manufactured and its I/II fracture toughness is then experimentally investigated. The stainless steel particles can be arranged either vertically under the outside magnetic guidance during manufacturing process or randomly. Comparisons with the one without stainless steel particles, the G I C and G I I C can increase by 81.88% and 87.72%. Numerical simulations are also carried out. A theoretical prediction model is proposed for the interface parameters of mode I fracture toughness and verified by comparing simulation results with experimental ones. The trial-and-error inversion method is used to effectively simulate the mode II fracture toughness. Different interlaminar interface parameters are tried to determine the interface parameters which can yield mode II fracture toughness closest to the experimental one. A relational equation is fitted using the particle volume content and interlaminar interface parameters. Additional experiment and simulation for specimen with a different particle density are performed to demonstrate the accuracy of interface parameters obtained by the trial-and-error inversion method. Highlights: A new magnetically guided stainless steel particle toughened composite is manufactured and experimentally investigated. The G I C and G I I C of the magnetically guided particle toughened carbon/epoxy composites can increase by 81.88% and 87.72%. A theoretical prediction model is proposed and verified for the interface parameters of mode I fracture toughness. Different interlaminar interface parameters are tried to determine the interface parameters of mode II fracture toughness.