Mode 1, Mode II, and Mixed Mode I/II Fracture Behavior of Laminated Structures

The idea of fracture modes in laminated structures is presented in this study, with particular attention to Mode I (opening), Mode II (in-plane shear), and Mixed Mode I/II. By utilizing the critical energy release rate, the fracture toughness of the joints was assessed. The double-cantilever beam specimen was used for mode-I tests, the end-notch flexure specimen was used for mode-II tests, and a combination of the two aforementioned specimens was used for mixed-mode tests (three mixity ratios). In order to assess and identify the method’s advantages and disadvantages, the cohesive zone modeling approach was also used to simulate the fracture behavior of the bonded joints. Each mode is clearly illustrated via images. Understanding fracture modes is crucial because of their effects on estimating the fracture toughness of a material: Knowing the dominant mode aids in estimating the resistance to crack propagation. Building structures to support particular loads: maximizing the predicted mode in the selection of materials, ply orientation, and reinforcing tactics. Finding the weak spots in laminated constructions identifying failure-prone locations according to the expected mode. This basic understanding facilitates a deeper comprehension and precise prediction of fracture behavior in layered structures by acting as a springboard for additional research into the concepts of fracture mechanics, particular materials, and testing techniques.