Crash behaviour and performance of long fibre reinforced thermoplastic material in comparison with continuous fibre reinforcement. Issue 4 (4th July 2018)

• Record Type: Journal Article
• Authors: Jung, Gihune; Schmeer, Sebastian; Mitschang, Peter
• Is Part Of: International journal of crashworthiness. Volume 23:Issue 4(2018)
• Page Start: 433
• Page End: 445
• Publication Date: 2018-07-04
• Subjects: Crashworthiness -- long fibre reinforcement -- thermoplastic -- dynamic test -- glass fibre; Automobiles -- Crashworthiness -- Periodicals; Airplanes -- Crashworthiness -- Periodicals; 629.2042
• DOI: 10.1080/13588265.2017.1345588
• Languages: English
• ISSNs: 1358-8265

Abstract

ABSTRACT: Multi-layered hybrid mat (MLH-mat) is a long fibre reinforced thermoplastic material with a high glass fibre content of around 45 vol. % and with inherent flowability. Crash behaviour and performance were investigated and compared with those of continuous fibre reinforcement. Dynamic tests were conducted on welded round-hat tubes with impact velocities over 8 m/s. PP/GF MLH-mat showed 44 J/g for specific energy absorption (SEA) and 63 MPa for mean stress, equivalent to continuous fibre reinforcement in performance. By changing matrix polymer, PA6/GF MLH-mat could obtain higher crashworthiness of 51 J/g for SEA and 84 MPa for mean stress; 15% higher in SEA compared to PP/GF MLH-mat. This enhancement is mainly related to longer strain and higher modulus as well as higher melting temperature of matrix polymer. The crash behaviour of MLH-mat fulfils the mode of 'splaying and lamina-bending followed by inside-wrinkling and outside-tearing' with more gentle deformation.