Phenomenological investigation on crash characteristics of thin layered CFRP-steel laminates. Issue 1 (2nd January 2022)

• Record Type: Journal Article
• Authors: Boose, Y.; Kappel, E.; Stefaniak, D.; Prussak, R.; Pototzky, A.; Weiß, L.
• Is Part Of: International journal of crashworthiness. Volume 27:Issue 1(2022)
• Page Start: 289
• Page End: 298
• Publication Date: 2022-01-02
• Subjects: crash -- hybrid laminate -- FML -- energy absorption -- SEA -- CFRP -- steel; Automobiles -- Crashworthiness -- Periodicals; Airplanes -- Crashworthiness -- Periodicals; 629.2042
• DOI: 10.1080/13588265.2020.1787681
• Languages: English
• ISSNs: 1358-8265

Abstract

Abstract: Most energy absorbing structures in automotive applications consist of metals. Those are characterised by high absolute energy absorption (EA) values yet low mass-specific energy absorption (SEA m ). In contrast carbon fibre reinforced polymers (CFRP) reach higher SEA m values. The difference however is not a direct consequence of the density, weight specific stiffness or strength. Instead, the failure progression and hence the energy dissipation characteristics of metallic and CFRP structures are different. Whether a combination of the two material types leads to an increase or decrease of the SEA depends on the crash characteristics of the laminate which supposedly depends on the lay-up. The present paper reports on an experimental investigation on the crash behaviour of omega-shaped fibre-metal laminates (FML) composed of unidirectional CFRP prepreg layers and steel-foils under compressive axial loads. A potential of the tested hybrid laminates is proven by an increase of the mass-specific energy absorption value (SEA m ) of 58%, compared to CFRP.