Complex fracture on thin-wall textile reinforced cement (TRC) shells monitored by acoustic emission. (October 2021)

• Record Type: Journal Article
• Authors: Van Driessche, Aron; Aggelis, Dimitrios G.; Tsangouri, Eleni
• Is Part Of: Thin-walled structures. Volume 167(2021)
• Publication Date: 2021-10
• Subjects: Textile reinforced cement (TRC) -- Shell -- Acoustic emission (AE) -- Digital Image Correlation (DIC) -- Fracture mode -- Attenuation; Thin-walled structures -- Periodicals; 690.1
• DOI: 10.1016/j.tws.2021.108216
• Languages: English
• ISSNs: 0263-8231

Abstract

Abstract: Novelly-designed thin-wall TRC shells are tested simulating service loads. The study tracks the main damage modes (cracking/interfacial delamination) using the Acoustic emission (AE) wave parameter trends and based on it, a novel multi-sensing and multi-input (experiments/simulations) methodology is built. It is shown that stronger shell curvature influences the stress field and the damage mode towards shear, something monitored by early AE even before visible cracks occur, while boundary conditions and the textiles volume content also have an effect on the TRC shell damage progress. The AE inspection efficacy is critically assessed considering the detrimental wave attenuation effect. Highlights: Thin-wall textile reinforced cement (TRC) shells are tested under service loads. Based on stress/strain analysis, cracking and debonding damage modes are detected. AE wave rise time and average frequency trends validate the fracture analysis. The effect of curvature and setup conditions on damage progress is assessed. The detrimental effect of wave attenuation is quantified in curved thin-wall TRCs.