A Numerical Failure Analysis of Multi-bolted Joints in FRP Laminates Based on Basalt Fibers. (2015)

• Record Type: Journal Article
• Authors: Nerilli, Francesca; Marino, Michele; Vairo, Giuseppe
• Is Part Of: Procedia engineering. Volume 109(2015)
• Page Start: 492
• Page End: 506
• Publication Date: 2015
• Subjects: Bolted joints -- FRP composite laminates -- Basalt fibers -- Pin-bearing failure.; Engineering -- Congresses; Engineering -- Periodicals; Engineering; Conference proceedings; Periodicals; 620.005
• DOI: 10.1016/j.proeng.2015.06.255
• Languages: English
• ISSNs: 1877-7058

Abstract

Abstract: This paper aims to model the progressive damage of multi-bolted joints connecting structural elements made up of FRP (fiber- reinforced polymers) composite laminates and comprising different fiber materials (namely, based on basalt, carbon and glass), as well as different stacking sequences. Differences in failure mode and ultimate-load values are numerically investigated. A numerical home-made finite element model has been conceived, implemented, and validated by means of available experimental data. The numerical model is based on an incremental displacement-based approach and on a plane-stress bi-dimensional for- mulation. The stress analysis has been performed by accounting for micro-structural stress-strain localization mechanisms, and describing the progressive damage process by implementing a failure criterion operating at the constituents' scale (namely, the Huang's criterion). Proposed results have highlighted that bolted joints based on basalt-FRP laminates and defined by a double- bolted configuration exhibited bearing failure loads comparable to those computed for glass-FRP and carbon-FRP laminates. In the case of single-bolted joints, the use of carbon-FRP laminates allowed to obtain the best mechanical properties, although joints based on basalt-FRP laminates numerically-experienced mechanical response and strength features always comparable with those of glass-FRP.