Creep and damage accumulation in orthotropic composites under cyclic loading

Tamužs, Vitauts; Andersons, J.; Анискевич, К.; Jansons, J.

doi:10.1007/bf02257900

Cited by 23 publications

(8 citation statements)

References 5 publications

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“…The potential Ãð ' hð'ÞÞ ¼ ð 2 ' h 2 ð'Þ=2Þ depends only on a single parameter k, because it is determined with the accuracy up to a multiplicative constant, but constants c and d could be separated only at loadings different from the off-axis tensile test. The parameter k should be determined from the best fit of stress-strain curves for all off-axis loadings into a single mastercurve, analogically as it was done for unidirectional composite [5,8].…”

Section: Uniaxial Loading Casementioning

confidence: 99%

“…The one-parameter version of the potential function has been successfully applied to describe the nonlinear response of unidirectionally reinforced composites under off-axis loading [3][4][5][6] and incorporated into laminate analysis [5,7]. It has been shown in [8] that the strain amplitude growth caused by the fatigue damage accumulation under off-axis cyclic loading of a fiber-dominated glass/polyester laminate also complies with associated flow formalism, having the same potential as for static off-axis loading.…”

Section: Introductionmentioning

confidence: 99%

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Response of Cross-Ply Composite to Off-Axis Loading

Tamužs¹,

Andersons²,

SpāArniņš

et al. 2002

Journal of Composite Materials

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Polymer composites are known to exhibit nonlinear stress–strain response due to nonlinearly elastic or plastic deformation of the matrix and damage accumulation. Mechanistic modeling of material response explicitly accounting for these interacting factors often leads to complex theories. Plasticity theory formalism provides an alternative for nonlinear deformation description of composite material. We examine the applicability of an orthotropic plasticity model, developed by Sun et al. for unidirectionally reinforced composite, to composite laminate. The response of a symmetric and balanced cross-ply glass/epoxy laminate is studied under uniaxial tensile loading at different angles to the material orthotropy axis. It is found that the associated flow rule and a quadratic approximation of the orthotropic potential function provide satisfactory description for the nonlinear strain component under monotonic loading for 15–45° off-axis angle range. The nonlinearity in on-axis loading (modulus degradation)is well described by stiffness reduction due to the cracks in transverse plies. Meanwhile the change of elastic modulus due to intralaminar cracking can be neglected in off-axis loading, but the possible intensification of nonlinear deformation in off-axis loading caused by the presence of intralaminar cracks agrees well with orthotropic potential formalism.

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Section: Uniaxial Loading Casementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Response of Cross-Ply Composite to Off-Axis Loading

Tamužs¹,

Andersons²,

SpāArniņš

et al. 2002

Journal of Composite Materials

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“…The model has been successfully applied to describe the nonlinear deformation of UD boron/aluminum and graphite/epoxy composites under off-axis loading. It has been shown in [2] that the strain amplitude growth caused by the fatigue damage accumulation under off-axis cyclic loading of a fibre dominated glass/ polyester laminate also complies with associated flow rule formalism, having the same potential as for static off-axis loading.…”

Section: Introductionmentioning

confidence: 90%

Applicability Range of the One-Parameter Ply Plasticity Model for Prediction of the Nonlinear Response of Laminates

Spβrnins

Andersons

Vārna

2005

Advanced Composites Letters

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A one-parameter lamina plasticity model is applied to predict the nonlinear deformation of an E-glass / epoxy cross-ply composite laminate under quasi-static uniaxial tensile loading at different angles to the material orthotropy axes. It is shown that the laminate theory yields accurate results within the plastic strain range covered in unidirectional continuous-fibre reinforced composite tests that are used to determine the plasticity model parameters.

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“…The effective plastic strain increment can be defined such that (5) Substitution of (3) and (4) into (5) yields άε"=-σάλ and (6)…”

Section: General 2-d Plasticity Modelmentioning

confidence: 99%

Nonlinear Mechanical Response of CFRP Laminates under Off-Axis Tensile Loading

Ogihara¹

2010

Science and Engineering of Composite Materials

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Effects of tensile loading angle on the stress-strain behavior in CFRP laminates are investigated experimentally. A material system used is T300/2500 carbon/epoxy system. Both a cross-ply and a woven laminates are used. The nonlinear behavior in the stress-strain curve is focused. To divide the total strain into the elastic and inelastic ones, loading-unloading tests are performed. Plasticity models are made to characterize the nonlinearity in the stress-strain curves.

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Creep and damage accumulation in orthotropic composites under cyclic loading

Cited by 23 publications

References 5 publications

Response of Cross-Ply Composite to Off-Axis Loading

Response of Cross-Ply Composite to Off-Axis Loading

Applicability Range of the One-Parameter Ply Plasticity Model for Prediction of the Nonlinear Response of Laminates

Nonlinear Mechanical Response of CFRP Laminates under Off-Axis Tensile Loading

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