Mechanism based nonlinear constitutive model for composite laminates subjected to large deformations

Mandel, Ulrich; Taubert, Robin; Hinterhölzl, Roland

doi:10.1016/j.compstruct.2015.04.029

Cited by 27 publications

(12 citation statements)

References 30 publications

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“…Achieving large deformations poses several challenges, as the deformation process becomes unstable once damage has initiated [1,2]. The ±45° laminates yield quite uniform shear stress distribution over the whole gauge area [7], and provide stable damage evolution for large deformation. However, the tension test of ±45° exhibit significant fibre rotation [8].…”

Section: Introductionmentioning

confidence: 99%

Effect of strain rate and fibre rotation on the in-plane shear response of ±45° laminates in tension and compression tests

Cui

Thomson

Pellegrino

et al. 2016

Composites Science and Technology

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This work focuses on the effect of strain rate and fibre rotation on the in-plane shear properties of composite laminates. The effect of fibre rotation on the measured shear properties, was for the first time experimentally quantified with the comparison between compression and tension tests of the ±45° laminate samples. Significant increase of shear strength and decrease of final failure strain was observed with the increase in strain rate from 5e-4 1/s to 1300 1/s. The nonlinear constitutive model was developed to simulate the large deformation process, in which the fibre orientation was updated as a function of the in-plane shear strain. The results of this investigation should motivate the updating of procedures for experimental characterization as well as analytical and numerical modelling of in-plane shear response of laminates.

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Section: Introductionmentioning

confidence: 99%

Effect of strain rate and fibre rotation on the in-plane shear response of ±45° laminates in tension and compression tests

Cui

Thomson

Pellegrino

et al. 2016

Composites Science and Technology

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“…12,13,21 The second type is the micro-mechanical model based on the microstructure morphology of composite materials, such as typical models proposed by King, Wang, and Mandel. 3,14,22 Some relevant observations in “Experimental results and discussion” section indicate that the compressive stress–strain curves of 4-harness satin weave carbon/epoxy composites have the similar overall shape and share some key features, for instance, the nearly linear elastic characteristics before yielding. This indicates that the mechanical properties of this material can be described by a macroscopic mechanical model.…”

Section: Theoretical Modelmentioning

confidence: 99%

“…More recently, Daniel et al 13 proposed a new nonlinear constitutive model to describe the rate-dependent behavior of the composites under states of stress including tensile and compressive loading. Mandel et al 14 also developed a material model for the large deformation mechanical behavior of composite laminates based on the microstructure and modality of the materials. But up to now, the mechanical properties of fiber-reinforced composites are still lack of study in depth and systematically.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation and modeling of dynamic thermomechanical behavior of 4-harness satin weave carbon/epoxy composites

Guo

et al. 2017

Journal of Thermoplastic Composite Materials

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Theoretical and experimental studies on the compressive mechanical behavior of 4-harness satin weave carbon/epoxy composite laminates under in-plane loading are conducted over the temperature range of 298–473 K and the strain rate range of 0.001–1700/s in this article. The stress–strain curves of 4-harness satin weave composites are obtained at different strain rates and temperatures, and key mechanical properties of the material are determined. The deformation mechanism and failure morphology of the samples are observed and analyzed by scanning electron microscope (SEM) micrographs. The results show that the uniaxial compressive mechanical properties of 4-harness satin weave composites are strongly dependent on the temperature but are weakly sensitive to strain rate. The peak stress and elastic modulus of the material have the trend of decrease with the increasing of temperature, and the decreasing trend can be expressed as the functional relationship of temperature shift factor. In addition, SEM observations show that the quasi-static failure mode of 4-harness satin weave composites is shear failure along the diagonal lines of the specimens, while the dynamic failure modes of the material are multiple delaminations and longitudinal splitting, and with the increasing of temperature, its longitudinal splitting is more serious, but the delamination is relatively reduced. A constitutive model with thermomechanical coupling effects is proposed based on the experimental results and the increment theory of elastic–plastic mechanics. The experimental verification and numerical analysis show that the model is shown to be able to predict the finite deformation behavior of 4-harness satin weave composites over a wide range of temperatures.

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“…The source of metal-like pseudo-ductility in angle-ply laminates is the non-linearity of the shear behavior of composites. The shear stress-to-applied stress ratio is highest for the loading angle of 45° [1][2][3]. Therefore, testing and modeling of the shear behavior of composite material is essential in the product development process.…”

Section: Introductionmentioning

confidence: 99%

“…However, none of the four proposed damage formulations (linear, non-linear, constant stress level, step-based damage) are in agreement with the measured test data of organo sheets. Many authors [1,[14][15][16] have shown that the effect of fiber rotation is also essential for predicting the results. However, at large strains, the fiber rotation calculation for woven fabric is much more complex due to the curvature and locking effect in warp and weft, for which a micromechanical model must be used.…”

Section: Introductionmentioning

confidence: 99%

Modeling Shear Behavior of Woven Fabric Thermoplastic Composites for Crash Simulations

Ahmad

Fang

2020

Appl Compos Mater

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Woven fabric thermoplastic composites possess high specific strength and stiffness along with thermoformability. To utilize the full potential of these materials to achieve better crash-safe designs in automotive structural parts, the measurement of non-linear shear behavior and its material modeling for FEM simulations is required. The standard testing method was used to measure the pure shear behavior of woven fabric composites. These results were compared with the shear behavior of material in the presence of normal stresses along the fiber direction. Tensile and compression cyclic testing of ± 45° laminate were carried out to measure the stiffness degradation and hardening of the material in the presence of tensile normal and compression normal stress. A methodology is proposed for taking into account the differences in shear behavior under different loading directions in an FEM simulation. Based on the experimental evidence, improvements in the mathematical description of plasticity and damage in continuum damage mechanics models are proposed. The model was implemented as a user-defined material subroutine (VUMAT) for Abaqus. The experimental results from coupon tests were used to verify the results of a single element simulation. Finally, a three-point bending test was used to validate the predictions of the user material model.

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Mechanism based nonlinear constitutive model for composite laminates subjected to large deformations

Cited by 27 publications

References 30 publications

Effect of strain rate and fibre rotation on the in-plane shear response of ±45° laminates in tension and compression tests

Effect of strain rate and fibre rotation on the in-plane shear response of ±45° laminates in tension and compression tests

Experimental investigation and modeling of dynamic thermomechanical behavior of 4-harness satin weave carbon/epoxy composites

Modeling Shear Behavior of Woven Fabric Thermoplastic Composites for Crash Simulations

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