The high strain rate tension behaviour of pseudo-ductile high performance thin ply composites

Mohamad Fotouhi; Jonathan Fuller; Marco Longana; Meisam Jalalvand; Michael R. Wisnom

doi:10.1016/j.compstruct.2019.02.068

The high strain rate tension behaviour of pseudo-ductile high performance thin ply composites

Mohamad Fotouhi^*, Jonathan Fuller, Marco Longana, Meisam Jalalvand, Michael R. Wisnom

^*Corresponding author for this work

Mechanical And Aerospace Engineering

Research output: Contribution to journal › Article › peer-review

26 Citations (Scopus)

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Abstract

In this study the effect of strain rate in tension on two different types of thin-ply pseudo-ductile laminates is reported. These comprised Unidirectional (UD) and quasi-isotropic (QI) hybrids made from low strain thin-ply carbon/epoxy and high strain glass/epoxy prepreg and all-carbon laminates made from thin-ply [±ϴ/0]s laminates referred to as angle-ply (AP) composites. Laminates were designed and subjected to a range of cross-head speeds from 2 mm/min (0.0003 s ⁻¹ ) to 10 m/s (100 s ⁻¹ ). The designed laminates were made from single or hybrids of low strain and high strain unidirectional prepregs, i.e. thin-ply Carbon/epoxy and Glass/epoxy, respectively. Dynamic stress-strain plots and details of the damage mechanisms were obtained for each sample and compared with the quasi-static test results. The investigated thin-ply UD and QI hybrid composite laminates showed excellent pseudo-ductility at different strain rates, whereas the AP laminates were strain rate dependent and pseudo-ductility decreased with increasing strain rate.

Original language	English
Pages (from-to)	365-376
Number of pages	12
Journal	Composite Structures
Volume	215
Early online date	19 Feb 2019
DOIs	https://doi.org/10.1016/j.compstruct.2019.02.068
Publication status	Published - 1 May 2019

Funding

This work was funded under the UK Engineering and Physical Sciences Research Council (EPSRC) Programme Grant EP/I02946X/1 on High Performance Ductile Composite Technology in collaboration with Imperial College, London. The research was also supported by “the EPSRC ”High Performance Discontinuous Fibre Composites a sustainable route to the next generation of composites” [EP/P027393/1] grant”. The high strain rate tests were performed at the Testing and Structures Research Laboratory of the University of Southampton, the authors wish to thank Professor Janice Barton and Dr Andrew Robinson. The data necessary to support the conclusions are included in the paper.

Keywords

angle-ply
high strain rate
hybrid
pseudo-ductility
quasi-isotropic
thin-ply

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10.1016/j.compstruct.2019.02.068

Fotouhi-etal-CS-2019-The-high-strain-rate-tension-behaviour-of-pseudo-ductile-high-performanceAccepted author manuscript, 2.39 MBLicence: CC BY-NC-ND 4.0

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abstract = " In this study the effect of strain rate in tension on two different types of thin-ply pseudo-ductile laminates is reported. These comprised Unidirectional (UD) and quasi-isotropic (QI) hybrids made from low strain thin-ply carbon/epoxy and high strain glass/epoxy prepreg and all-carbon laminates made from thin-ply [±ϴ/0]s laminates referred to as angle-ply (AP) composites. Laminates were designed and subjected to a range of cross-head speeds from 2 mm/min (0.0003 s −1 ) to 10 m/s (100 s −1 ). The designed laminates were made from single or hybrids of low strain and high strain unidirectional prepregs, i.e. thin-ply Carbon/epoxy and Glass/epoxy, respectively. Dynamic stress-strain plots and details of the damage mechanisms were obtained for each sample and compared with the quasi-static test results. The investigated thin-ply UD and QI hybrid composite laminates showed excellent pseudo-ductility at different strain rates, whereas the AP laminates were strain rate dependent and pseudo-ductility decreased with increasing strain rate. ",

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The high strain rate tension behaviour of pseudo-ductile high performance thin ply composites

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