Experimental investigation on mean crushing stress characterization of carbon–epoxy plies under compressive crushing mode

Israr, Haris Ahmad; Rivallant, Samuel; Barrau, Jean-Jacques

doi:10.1016/j.compstruct.2012.09.022

Cited by 53 publications

(47 citation statements)

References 21 publications

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“…A set of laminated wedge specimens were crush-tested by Israr et al [21] and the results were used to validate the present model. A hydraulic testing machine, at a constant crosshead displacement rate of 6mm/min was used on T700/M21 [(0°/90°) 4 ] s specimens with a 20° chamfer angle.…”

Section: Methodsmentioning

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: Methodsmentioning

confidence: 99%

Predicting Impact Damage, Residual Strength and Crashworthiness of Composite Structures

Falzon

Tan

2016

SAE Int. J. Mater. Manf.

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“…Israr et al [15] showed that during crushing process, the crushing stress is about constant (Fig. 20) and its value is similar to the compressive matrix failure stress.…”

Section: Modeling In the Transverse Directionmentioning

confidence: 82%

“…(4)) could lead to high positive strain in the out-of-plane direction and to increasing of the crushing stress r crush t . But the results of Israr et al [15] showed that during crushing process, the crushing stress is about constant, then it is necessary to take into account this expansion to define the t-crushing stress:…”

Section: Modeling In the Transverse Directionmentioning

confidence: 99%

“…Indeed, some phenomena like compressive fiber failure or wedge effect, which are of minor importance during skin impact, become important in case of edge damage. In addition, the damage scenario of the edge impact test shows similarities with those of the crushing test [13][14][15], and these studies were the starting point of the edge impact modeling developed in this paper.…”

Section: Introductionmentioning

confidence: 98%

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Edge impact modeling on stiffened composite structures

Ostré

Minot²,

Aboissière³

2015

Composite Structures

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a b s t r a c tFinite Element Analysis of low velocity/low energy edge impact has been carried out on carbon fiber reinforced plastic structure. Edge impact experimental results were then compared to the numerical ''Discrete Ply Model'' in order to simulate the edge impact damage. This edge impact model is inspired to out-of-plan impact model on a laminate plate with addition of new friction and crushing behaviors. From a qualitative and quantitative point of view, this edge impact model reveals a relatively good experiment/model agreement concerning force-time and force-displacement curves, damage morphology or permanent indentation after impact. In particular the correlation is faithful concerning the results of the parameters retained by industry; the maximum crack length on the edge and the permanent indentation.Finally, it can be noticed that the model quickly answers in crushing mode and goes in an inadequate way from the dynamic behavior to the quasi-static behavior. In order to correct this problem it seems necessary to implement a strain rate effect in the behavior law on the fiber failure in compression. The next step is to apply this model to the compression after impact.

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“…The analysis predicted the crushing load but predicting the peak loads in the crushing process would require a much more refined model. The crushing of laminated plates is thought to be simpler because it involves fewer failure modes than that of laminated tubes [345][346][347][348]. Experiments showed significant differences between the static and dynamic crushing of composite materials.…”

Section: Aerospace Applicationsmentioning

confidence: 99%

Cohesive zone models and impact damage predictions for composite structures

2015

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This article surveys existing cohesive zone models (CZM) and their use in numerical simulations for analysis impacts on composite structures and predicting the damage induced. These models are used for matrix cracks and delamination. The first part of article gives the required background on failure criteria for predicting the onset of delaminations, on fracture mechanics and the various types of CZM. The second part discusses applications of CZM to several types of impact problems with composite structures. Applications for these models to other problems are briefly mentioned at the end. CZM are now part of state of the art numerical simulations with progressive damage analysis.

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Experimental investigation on mean crushing stress characterization of carbon–epoxy plies under compressive crushing mode

Cited by 53 publications

References 21 publications

Predicting Impact Damage, Residual Strength and Crashworthiness of Composite Structures

Predicting Impact Damage, Residual Strength and Crashworthiness of Composite Structures

Edge impact modeling on stiffened composite structures

Cohesive zone models and impact damage predictions for composite structures

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