Experimental study on the interaction between oblique incident blast stress wave and static crack by dynamic photoelasticity. (January 2022)

• Record Type: Journal Article
• Authors: Chen, Cheng; Yang, Renshu; Xu, Peng; Ding, Chenxi
• Is Part Of: Optics and lasers in engineering. Volume 148(2022)
• Publication Date: 2022-01
• Subjects: Oblique incident -- Blast stress wave -- Dynamic photoelasticity -- Epoxy resin plate; Lasers in engineering -- Periodicals; Optical measurements -- Periodicals; Optics -- Periodicals; Lasers en ingénierie -- Périodiques; Mesures optiques -- Périodiques; Optique -- Périodiques; 621.36605
• DOI: 10.1016/j.optlaseng.2021.106764
• Languages: English
• ISSNs: 0143-8166

Abstract

Highlights: Oblique incident blast stress wave from two incident direction have significant effects on the stress field and mode of fracture of the crack. Dynamic photoelastic experimental system under explosive loading is designed. A lot of details about the interaction between the oblique incident blast stress wave and the prefabricated crack are revealed by dynamic photoelastic method and finite element method. Abstract: In this paper, the interaction between the oblique incident blast stress wave and the prefabricated crack is studied using the dynamic photoelastic method and numerical simulation method. First, blast loading dynamic photoelastic experiment system is established. Second, blast stress wave and crack interaction experiments are carried out. Epoxy resin plate is used as specimen material, while lead azide explosive is used to apply blasting load. In the experiment, the evolution of stress field at crack wall and crack tip are observed by a high-speed camera. The experimental results show that incident angle of blast stress wave has a great influence on the way the stress wave interacts with the crack and the field at the crack tip. Finally, based on the experimental results, two numerical models are conducted using FEM software. The numerical results of stress field are in good agreement with photoelastic experiment, which verifies the experimental analysis.