Experimental investigation of the failure envelope of unidirectional carbon-epoxy composite under high strain rate transverse and off-axis tensile loading

Kühn, Peter; Ploeckl, Marina; Koerber, and Hannes

doi:10.1051/epjconf/20159401040

Cited by 19 publications

(8 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Stress was measured by expansion of an adjacent steel ring with strain gauges [4]. The other record that contains full tensile stress-strain curves in the range of interest is by Kuhn et al, who used a split-Hopkinson pressure bar (SHPB) adapted to apply tension [13]. They performed dynamic tension tests on unidirectional C/E in the transverse direction.…”

Section: Tensile Rate Dependence In the Literaturementioning

confidence: 99%

Stress-strain synchronization for high strain rate tests on brittle composites

et al. 2018

View full text Add to dashboard Cite

Nowadays, many researchers develop rate-dependent composite material models for application in dynamic simulations. Ideally, full stress-strain curves at a wide range of strain rates are available for identification of the different parameters of these models. Dynamic tensile tests are needed to produce the experimental input data. However, especially for brittle materials, the data acquisition during these tests becomes critical. The effect of synchronization on the test results is investigated by conducting a series of dynamic tensile tests on three different brittle continuous-fibre composite laminates. It is demonstrated that synchronization errors of the order of 1 microsecond already have a significant effect on the test outcome at high rates. With the aid of a finite-element model, the limiting factors on the maximum attainable strain rate are quantified.

show abstract

Section: Tensile Rate Dependence In the Literaturementioning

confidence: 99%

Stress-strain synchronization for high strain rate tests on brittle composites

et al. 2018

View full text Add to dashboard Cite

show abstract

“…However, another group of researchers [133][134][135][136] found that the ratio of transverse to in-plane shear moduli and strengths was independent of rate. In compression, the minimum yield strength can occur (via interlaminar shear) for fibres that are angled at around 60° to the loading direction [137,138], whereas under tension the minimum occurs at 90° [139] (Fig. 11).…”

Section: Off-axis Loading and Shear Behaviourmentioning

confidence: 99%

Measuring the Effect of Strain Rate on Deformation and Damage in Fibre-Reinforced Composites: A Review

Perry

Walley

2022

J. dynamic behavior mater.

View full text Add to dashboard Cite

This review aims to assess publications relevant to understanding the rate-dependent dynamic behaviour of glass- and carbon-fibre reinforced polymer composites (FRPs). FRPs are complex structures composed of fibres embedded in a polymer matrix, making them highly anisotropic. Their properties depend on their constituent materials as well as micro-, meso- and macro-scale structure. Deformation proceeds via a variety of damage mechanisms which degrade them, and failure can occur by one or more different processes. The damage and failure mechanisms may exhibit complex and unpredictable rate-dependence, with certain phenomena only observable under specific loading conditions or geometries. This review focusses on experimental methods for measuring the rate-dependent deformation of fibre composites: it considers high-stain-rate testing of both specimens of ‘simple’ geometry as well as more complex loadings such as joints, ballistic impact and underwater blast. The effects of strain rate on damage and energy-based processes are also considered, and several scenarios identified where strength and toughness may substantially decrease with an increase in strain rate.

show abstract

“…To validate the present micromechanics model, experimental stress-strain curves of a series of composites are required. For the purpose of validation, experimental data of AS/PEEK 45 , IM7/8552 46,47 and T300/7901 48 UD carbon fiber reinforced polymer composites are employed. www.nature.com/scientificreports www.nature.com/scientificreports/ Table 1 lists the elastic properties of the three composites and their constituent materials.…”

Section: Experimental Validationmentioning

confidence: 99%

A micromechanics based elasto-plastic damage model for unidirectional composites under off-axis tensile loads

Wang

Chen

et al. 2020

Sci Rep

View full text Add to dashboard Cite

Nonlinear properties of composite materials are essential for their engineering application. In this work, a three-phase micromechanics bridging model is employed to evaluate the nonlinear behavior of a composite from properties of fiber, matrix and interphase. It is assumed that the matrix elastoplasticity and the interface damage are two major sources of the nonlinearity. The former is described by the J2 flow rule. The latter is approximated by an interphase with stiffness degradation. For an interphase, an equivalent damage stress is introduced to account for the effect of normal and shear stress on the interface damage growth. Further, an explicit empirical equation is developed to relate the equivalent damage stress and the stiffness degradation of an interphase. The present elasto-plastic damage model is validated by comparing with experimental data of a series of composites under off-axis tensile loads.

show abstract

Experimental investigation of the failure envelope of unidirectional carbon-epoxy composite under high strain rate transverse and off-axis tensile loading

Cited by 19 publications

References 15 publications

Stress-strain synchronization for high strain rate tests on brittle composites

Stress-strain synchronization for high strain rate tests on brittle composites

Measuring the Effect of Strain Rate on Deformation and Damage in Fibre-Reinforced Composites: A Review

A micromechanics based elasto-plastic damage model for unidirectional composites under off-axis tensile loads

Contact Info

Product

Resources

About