A hybrid model for modelling arbitrary cracks in isotropic plate structures. (February 2023)

• Record Type: Journal Article
• Authors: Luo, Yulin; Featherston, Carol A.; Kennedy, David
• Is Part Of: Thin-walled structures. Volume 183(2023)
• Publication Date: 2023-02
• Subjects: Plates -- Cracks -- Damage detection -- Exact strip -- Finite element -- Wittrick–Williams​ algorithm; Thin-walled structures -- Periodicals; 690.1
• DOI: 10.1016/j.tws.2022.110345
• Languages: English
• ISSNs: 0263-8231

Abstract

Abstract: Damage modelling is essential in preliminary structural design and non-destructive damage detection. This paper investigates changes in natural frequencies of plates due to an arbitrarily aligned crack. A novel hybrid method couples an exact strip model for the intact part with a finite element model for the cracked part. The crack is modelled as a rotational spring with additional rotational freedoms being added to the finite element nodes. The method is validated against published results for through-the-depth cracks. Cracks with varying direction, location, depth and length are used to study the effects of changing the crack parameters.