Experimental investigation of high velocity oblique impact and residual tensile strength of carbon/epoxy laminates

Ashwin Kristnama; Xiaodong Xu; David Nowell; Michael Wisnom; Stephen Hallett

doi:10.1016/j.compscitech.2019.107772

Experimental investigation of high velocity oblique impact and residual tensile strength of carbon/epoxy laminates

Ashwin Kristnama, Xiaodong Xu, David Nowell, Michael Wisnom, Stephen Hallett

Research output: Contribution to journal › Article (Academic Journal) › peer-review

19 Citations (Scopus)

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Abstract

Composite components are required to be resilient against Foreign Object Damage (FOD) induced by localised high velocity impact events. Here an experimental investigation into high velocity oblique impacts and residual tensile strength of thin quasi-isotropic carbon/epoxy laminates is reported. Oblique (45°) impacts between 100 m/s and 350 m/s were carried out using 3mm steel cubes on the edge and the centre of the laminates, mounted as a cantilever beam. Impact induced damage was characterised using X-ray Computed Tomography (CT) and the residual strength of impacted laminates was determined through quasi-static tensile tests. The residual strength shows a strong dependence on the impact damage size, characterised in terms of fibre fracture width and delamination area. Machined notches were then investigated and compared to impacted laminates in terms of residual strength.

Original language	English
Article number	107772
Number of pages	9
Journal	Composites Science and Technology
Volume	182
Early online date	6 Aug 2019
DOIs	https://doi.org/10.1016/j.compscitech.2019.107772
Publication status	Published - 29 Sept 2019

Research Groups and Themes

Composites UTC
Bristol Composites Institute ACCIS

Keywords

Laminate
Impact behaviour
Strength
Notch

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title = "Experimental investigation of high velocity oblique impact and residual tensile strength of carbon/epoxy laminates",

abstract = "Composite components are required to be resilient against Foreign Object Damage (FOD) induced by localised high velocity impact events. Here an experimental investigation into high velocity oblique impacts and residual tensile strength of thin quasi-isotropic carbon/epoxy laminates is reported. Oblique (45°) impacts between 100 m/s and 350 m/s were carried out using 3mm steel cubes on the edge and the centre of the laminates, mounted as a cantilever beam. Impact induced damage was characterised using X-ray Computed Tomography (CT) and the residual strength of impacted laminates was determined through quasi-static tensile tests. The residual strength shows a strong dependence on the impact damage size, characterised in terms of fibre fracture width and delamination area. Machined notches were then investigated and compared to impacted laminates in terms of residual strength.",

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author = "Ashwin Kristnama and Xiaodong Xu and David Nowell and Michael Wisnom and Stephen Hallett",

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T1 - Experimental investigation of high velocity oblique impact and residual tensile strength of carbon/epoxy laminates

AU - Kristnama, Ashwin

AU - Xu, Xiaodong

AU - Nowell, David

AU - Wisnom, Michael

AU - Hallett, Stephen

PY - 2019/9/29

Y1 - 2019/9/29

N2 - Composite components are required to be resilient against Foreign Object Damage (FOD) induced by localised high velocity impact events. Here an experimental investigation into high velocity oblique impacts and residual tensile strength of thin quasi-isotropic carbon/epoxy laminates is reported. Oblique (45°) impacts between 100 m/s and 350 m/s were carried out using 3mm steel cubes on the edge and the centre of the laminates, mounted as a cantilever beam. Impact induced damage was characterised using X-ray Computed Tomography (CT) and the residual strength of impacted laminates was determined through quasi-static tensile tests. The residual strength shows a strong dependence on the impact damage size, characterised in terms of fibre fracture width and delamination area. Machined notches were then investigated and compared to impacted laminates in terms of residual strength.

AB - Composite components are required to be resilient against Foreign Object Damage (FOD) induced by localised high velocity impact events. Here an experimental investigation into high velocity oblique impacts and residual tensile strength of thin quasi-isotropic carbon/epoxy laminates is reported. Oblique (45°) impacts between 100 m/s and 350 m/s were carried out using 3mm steel cubes on the edge and the centre of the laminates, mounted as a cantilever beam. Impact induced damage was characterised using X-ray Computed Tomography (CT) and the residual strength of impacted laminates was determined through quasi-static tensile tests. The residual strength shows a strong dependence on the impact damage size, characterised in terms of fibre fracture width and delamination area. Machined notches were then investigated and compared to impacted laminates in terms of residual strength.

KW - Laminate

KW - Impact behaviour

KW - Strength

KW - Notch

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DO - 10.1016/j.compscitech.2019.107772

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Experimental investigation of high velocity oblique impact and residual tensile strength of carbon/epoxy laminates

Abstract

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Keywords

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