Improvement of numerical methods for crash analysis in future composite aircraft design

Deletombe, E.; Delsart, David; Kohlgrüber, Dieter; Johnson, Alastair

doi:10.1016/s1270-9638(00)00126-7

Cited by 25 publications

(6 citation statements)

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“…Among these materials, the application of carbonfiber reinforced plastics (CFRP) has been remarkably increasing due to its high stiffness, high strength-toweight ratio, high impact damage tolerance, and high impact energy absorption capacity. [1][2][3] In order to apply CFRP laminates to auto body structures, it is essential to obtain the dynamic material properties of CFRP laminates accurately because auto body structures are likely to undergo high speed deformation during a crash event. [4][5][6] Therefore, it is important to employ the dynamic material properties to numerical simulation for vehicle design and crashworthiness assessment to ensure its accuracy and reliability.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the effect of the strain rate on the tensile properties of carbon–epoxy composite laminates

Kwon

Choi

Huh

et al. 2016

Journal of Composite Materials

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This paper is concerned with evaluation and prediction of the tensile properties of carbon fiber-reinforced plastics laminates considering the strain rate effect at intermediate strain rates. Uniaxial tensile tests of carbon fiber-reinforced plastics laminates were conducted at various strain rates ranging from 0.001 s–1 to 100 s–1 using Instron 8801 and a high speed material testing machine to measure the variation of the elastic modulus and the ultimate tensile strength. Tensile test specimens were designed based on the ASTM standards and stacked unidirectionally such as [0°], [90°] and [45°] to predict the elastic modulus of carbon fiber-reinforced plastics laminates with various stacking sequences. The axial strain was measured by the digital image correlation method using a high speed camera and ARAMIS software to enhance the accuracy of the strain measurement. A prediction model of the elastic modulus of carbon fiber-reinforced plastics laminates is newly proposed in consideration of the laminate theory and the tensile properties of unidirectional carbon fiber-reinforced plastics laminates. The prediction model was utilized to predict the tensile properties of [0°/90°]s laminates, [±45°]s laminates, and [0°/±45/90°]T laminates for validation of the model. The elastic moduli predicted were compared with the static and dynamic tensile test results to confirm the accuracy of the prediction model.

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Section: Introductionmentioning

confidence: 99%

Evaluation of the effect of the strain rate on the tensile properties of carbon–epoxy composite laminates

Kwon

Choi

Huh

et al. 2016

Journal of Composite Materials

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“…Studies of dynamic loading are mainly based on viscoplastic models [1][2][3] or loading rate-dependent failure criteria. 4,5 These models are identified on experiments using hydraulic jacks and/ or Split Hopkinson pressure bars. The usual strain rate range in such experiments is from 10 À1 s À1 to 10 3 s À1 .…”

Section: Introductionmentioning

confidence: 99%

Improved viscoelastic model for laminate composite under static and dynamic loadings

Berthe

Brieu

Deletombe

2012

Journal of Composite Materials

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Organic matrix composite materials are rate-dependent. Approaches exist for static and for dynamic cases but not for both. In the present study, a viscoelastic spectral model, classically used for low strain rates, was successfully identified on dynamic test data as being suitable for high strain rates. The associated identified model was no longer available for low strain rates. An improved formulation of the model was devised, to be representative for both high and low strain rates. Results exhibited the desired rate dependence and good agreement with experimental data.

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“…For example, the traditional metal fuselage structural crashworthiness was studied under the support of Brite-Euram Project [14]. From 1996 to 2000, the mechanical property and failure mechanism of carbon fiber reinforced composites, development of impact analysis code, structural design and experimental validation of composite energy absorbers were studied under the support of the CRASURV Project [15]. In the early 21st century, the CAST Project supported the dynamic response analysis of aircraft structures under high-velocity impact loading and the research on water landing analysis code of helicopters [16].…”

Section: Historical Development Of Aircraft Crashworthinessmentioning

confidence: 99%

Crashworthy design and energy absorption mechanisms for helicopter structures: A systematic literature review

Yang

Wen

et al. 2020

Progress in Aerospace Sciences

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Improvement of numerical methods for crash analysis in future composite aircraft design

Cited by 25 publications

References 0 publications

Evaluation of the effect of the strain rate on the tensile properties of carbon–epoxy composite laminates

Evaluation of the effect of the strain rate on the tensile properties of carbon–epoxy composite laminates

Improved viscoelastic model for laminate composite under static and dynamic loadings

Crashworthy design and energy absorption mechanisms for helicopter structures: A systematic literature review

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