Intralaminar fracture toughness of a cross-ply laminate and its constituent sub-laminates

Jose, Sujatha; Kumar, Rakesh; Jana, M.K.; Rao, G. Venkateswara

doi:10.1016/s0266-3538(01)00011-2

Cited by 76 publications

(38 citation statements)

References 13 publications

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“…Double-cantilever-beam (DCB) [25], four-point end-notched flexure (4ENF) [26] and Mixed-mode bending (MMB) [27] test configurations were used to determine initiation/propagation fracture toughness of mode I, mode II and mixed-mode respectively. Compact Tension (CT) and Compact compression tests (CC) [28,29] were employed to measure the longitudinal tensile and compressive fracture toughness. V-notched rail shear tests were employed to measure the non-linear behaviour and fracture toughness associated with shear loading [30].…”

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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“…(Jackson and Ratcliffe [7] found that the stress intensity factor is not affected significantly by the morphology of The data reduction for CT or CC specimens made of an orthotropic material requires particular attention. Other researchers have used the stress intensity factor approach [2,8,9], often citing the ASTM standard E399 [10] for the determination of the fracture toughness in metals using CT tests [2,8].…”

Section: Test Methods and Data Reductionmentioning

confidence: 99%

“…Jose et al [2] carried out Finite Element (FE) analyses of laminate CT specimens, and compared the stress intensity factor obtained from Eq. 1 with the one obtained from FE.…”

Section: Test Methods and Data Reductionmentioning

confidence: 99%

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Fracture toughness of the tensile and compressive fibre failure modes in laminated composites

Pinho

Robinson

Iannucci

2006

Composites Science and Technology

473

260

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“…Double-cantilever-beam (DCB) [38], four-point end-notched flexure (4ENF) [39] and Mixed-mode bending (MMB) [40] tests were used to determine initiation/propagation interlaminar fracture toughness in mode I, mode II and mixed-mode, respectively. Compact Tension (CT) and Compact Compression (CC) tests [41,42] were employed to measure the longitudinal tensile and compressive intralaminar fracture toughness. V-notched rail shear tests were employed to measure the non-linear behaviour and fracture toughness associated with shear loading [43].…”

Section: Materials Propertiesmentioning

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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Intralaminar fracture toughness of a cross-ply laminate and its constituent sub-laminates

Cited by 76 publications

References 13 publications

Predicting Impact Damage, Residual Strength and Crashworthiness of Composite Structures

Predicting Impact Damage, Residual Strength and Crashworthiness of Composite Structures

Fracture toughness of the tensile and compressive fibre failure modes in laminated composites

Modelling the crush behaviour of thermoplastic composites

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