Experimental study of CFRP components subjected to dynamic crash loads

Waimer, Matthias; Kohlgrüber, Dieter; Hachenberg, Dieter; Voggenreiter, Heinz

doi:10.1016/j.compstruct.2013.05.030

Cited by 38 publications

(14 citation statements)

References 16 publications

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“…Corrugated webs manufactured with carbon fibre (CF)/Epoxy have been used for several energy-absorbing applications in helicopter sub-floor [22] and aircraft fuselage structures [23]. The self-support nature of corrugated composite structures doesn't require any specialized test fixtures, hence removing the possibility of such fixtures influencing the crush behaviour of the specimen [24].…”

Section: Crushing Of Thermoplastic Compositesmentioning

confidence: 99%

Predicting Impact Damage, Residual Strength and Crashworthiness of Composite Structures

Falzon

Tan

2016

SAE Int. J. Mater. Manf.

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The development of the latest generation of wide-body carbon-fibre composite passenger aircraft has heralded a new era in the utilisation of these materials. The premise of superior specific strength and stiffness, corrosion and fatigue resistance, is tempered by high development costs, slow production rates and lengthy and expensive certification programmes. Substantial effort is currently being directed towards the development of new modelling and simulation tools, at all levels of the development cycle, to mitigate these shortcomings. One of the primary challenges is to reduce the extent of physical testing, in the certification process, by adopting a 'certification by simulation' approach. In essence, this aspirational objective requires the ability to reliably predict the evolution and progression of damage in composites. The aerospace industry has been at the forefront of developing advanced composites modelling tools. As the automotive industry transitions towards the increased use of composites in mass-produced vehicles, similar challenges in the modelling of composites will need to be addressed, particularly in the reliable prediction of crashworthiness. While thermoset composites have dominated the aerospace industry, thermoplastics composites are likely to emerge as the preferred solution for meeting the high-volume production demands of passenger road vehicles. This keynote paper outlines recent progress and current challenges in the development of finite-element-based predictive modelling tools for capturing impact damage, residual strength and energy absorption capacity of thermoset and thermoplastic composites for crashworthiness assessments.

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Section: Crushing Of Thermoplastic Compositesmentioning

confidence: 99%

Predicting Impact Damage, Residual Strength and Crashworthiness of Composite Structures

Falzon

Tan

2016

SAE Int. J. Mater. Manf.

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“…This trend is also identified in the studies on other sectional CFRP tubes [16,19,24] where the ply number (wall thickness) signifies an important parameter contributing to the crashworthiness characteristics and preventing the structure from the failure of global or local buckling. It is known from the Euler's formula for columns [25] that the critical load causing buckling P cr can be expressed as…”

Section: Crashworthiness Characteristicsmentioning

confidence: 67%

“…Jackson et al [18] investigated the laminate design on crush performance of open sectional CFRP specimens by dynamic and quasi-static crushing tests, and they reported that dynamic test of the selected laminate designs resulted in a reduction in SEA from 6% to 15% compared to the quasi-static case. Waimer et al [19] explored the dynamic failure behavior of CFRP aircraft components under axial crushing, and they quantified the influences of design parameters on failure modes and loadedisplacement (L-d) characteristics. Boria et al [20] carried out experimental and numerical investigations into the impact behavior of a composite impact attenuator for a Formula SAE racing car to pass the homologation requirements.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation into dynamic axial impact responses of double hat shaped CFRP tubes

Liu

et al. 2015

Composites Part B: Engineering

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“…Corrugated webs manufactured with carbon fibre (CF)/Epoxy have been used for several energy-absorbing applications in helicopter sub-floor [3] and aircraft fuselage structures [4].…”

Section: Introductionmentioning

confidence: 99%

Modelling the crush behaviour of thermoplastic composites

Tan

Falzon

2016

Composites Science and Technology

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Thermoplastic composites are likely to emerge as the preferred solution for meeting the high-volume production demands of passenger road vehicles. Substantial effort is currently being directed towards the development of new modelling techniques to reduce the extent of costly and time consuming physical testing. Developing a high-fidelity numerical model to predict the crush behaviour of composite laminates is dependent on the accurate measurement of material properties as well as a thorough understanding of damage mechanisms associated with crush events. This paper details the manufacture, testing and modelling of self-supporting corrugated-shaped thermoplastic composite specimens for crashworthiness assessment. These specimens demonstrated a 57.3% higher specific energy absorption compared to identical specimen made from thermoset composites. The corresponding damage mechanisms were investigated in-situ using digital microscopy and post analysed using Scanning Electron Microscopy (SEM). Splaying and fragmentation modes were the 2 primary failure modes involving fibre breakage, matrix cracking and delamination. A mesoscale composite damage model, with new non-linear shear constitutive laws, which combines a range of novel techniques to accurately capture the material response under crushing, is presented. The force-displacement curves, damage parameter maps and dissipated energy, obtained from the numerical analysis, are shown to be in a good qualitative and quantitative agreement with experimental results. The proposed approach could significantly reduce the extent of physical testing required in the development of crashworthy structures.

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Experimental study of CFRP components subjected to dynamic crash loads

Cited by 38 publications

References 16 publications

Predicting Impact Damage, Residual Strength and Crashworthiness of Composite Structures

Predicting Impact Damage, Residual Strength and Crashworthiness of Composite Structures

Experimental investigation into dynamic axial impact responses of double hat shaped CFRP tubes

Modelling the crush behaviour of thermoplastic composites

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