Development of an Orthotropic Elasto-Plastic Generalized Composite Material Model Suitable for Impact Problems

Goldberg, Robert K.; Carney, Kelly S.; DuBois, Paul; Hoffarth, Canio; Harrington, Joseph; Rajan, Subramaniam; Blankenhorn, Gunther

doi:10.1061/(asce)as.1943-5525.0000580

Cited by 30 publications

(27 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The input to the model consists of 12 tabulated stress-strain curves generated from actual experimental or virtual tests [10]-1, 2 and 3-direction tension curves, 1, 2 and 3-direction compression curves, 1-2, 2-3 and 3-1 plane shear curves, and 45 • off-axis tension/compression curves in the 1-2, 2-3 and 3-1 planes. A brief summary of the deformation model is presented here and further details can be found in our earlier publications [11][12][13]. The yield function is a modified form of the commonly used Tsai-Wu composite failure model and is defined as…”

Section: Theoretical Detailsmentioning

confidence: 99%

“…After the tests, the panels were carefully investigated and the examinations showed no damage and failure. In the current version of MAT213 implementation, (a) the deformation model requires 12 stressstrain curves for each set of temperatures and strain rates: 1, 2 and 3-direction tension curves, 1, 2 and 3-direction compression curves, 1-2, 2-3 and 3-1 plane shear curves, and 45° off-axis tension/compression curves in the 1-2, 2-3 and 3-1 planes [10][11][12]; (b) the damage model requires kl ij d versus total strain curves [18,19]; and (c) a simple failure model (principal strain theory) is currently implemented with the intent to flag models where one or more strain components has exceeded limiting values, rather than to actually predict failure. For the impact test under consideration, quasistatic, room temperature data was used.…”

Section: Experimental and Numerical Modeling Studiesmentioning

confidence: 99%

See 1 more Smart Citation

Verification and Validation of a Three-Dimensional Orthotropic Plasticity Constitutive Model Using a Unidirectional Composite

Hoffarth

Khaled

Shyamsunder

et al. 2017

Fibers

Self Cite

View full text Add to dashboard Cite

Abstract:A three-dimensional constitutive model has been developed for modeling orthotropic composites subject to impact loads. It has three distinct components-a deformation model involving elastic and plastic deformations; a damage model; and a failure model. The model is driven by tabular data that is generated either using laboratory tests or via virtual testing. A unidirectional composite-T800/F3900, commonly used in the aerospace industry, is used in the verification and validation tests. While the failure model is under development, these tests indicate that the implementation of the deformation and damage models in a commercial finite element program, LS-DYNA, is efficient, robust and accurate.

show abstract

Section: Theoretical Detailsmentioning

confidence: 99%

Section: Experimental and Numerical Modeling Studiesmentioning

confidence: 99%

Verification and Validation of a Three-Dimensional Orthotropic Plasticity Constitutive Model Using a Unidirectional Composite

Hoffarth

Khaled

Shyamsunder

et al. 2017

Fibers

Self Cite

View full text Add to dashboard Cite

show abstract

“…While there are several material models currently available within commercial transient dynamic codes such as LS-DYNA [1] to analyze the impact response of composites, areas have been identified where the predictive capabilities of these models can be improved. These limitations have been extensively discussed in Goldberg, et al [2,3]. Of particular relevance to the current study, one major limitation of the currently existing models is that the input to these models generally consists of point-wise properties (such as the modulus, failure stress or failure strain in a particular coordinate direction) that leads to curve fit approximations to the material stress-strain curves and simplified approximations to the actual material failure surfaces.…”

Section: Introductionmentioning

confidence: 99%

“…The material model is meant to be a fully generalized model suitable for use with a large number of composite architectures (laminated or textile). The deformation model, described extensively in Goldberg, et al [2], is based on extending the commonly used Tsai-Wu composite failure model [4] to a strain hardening plasticity model with a non-associative flow rule. For the damage model, described extensively in Goldberg, et al [3], a strain equivalent formulation is used in which the deformation and damage calculations can be uncoupled.…”

Section: Introductionmentioning

confidence: 99%

Implementation of a Tabulated Failure Model into a Generalized Composite Material Model Suitable for Use in Impact Problems

Goldberg

Carney

DuBois

et al. 2017

American Society for Composites 2017

Self Cite

View full text Add to dashboard Cite

The need for accurate material models to simulate the deformation, damage and failure of polymer matrix composites under impact conditions is becoming critical as these materials are gaining increased use in the aerospace and automotive communities. The aerospace community has identified several key capabilities which are currently lacking in the available material models in commercial transient dynamic finite element codes. To attempt to improve the predictive capability of composite impact simulations, a next generation material model is being developed for incorporation within the commercial transient dynamic finite element code LS-DYNA. The material model, which incorporates plasticity, damage and failure, utilizes experimentally based tabulated input to define the evolution of plasticity and damage and the initiation of failure as opposed to specifying discrete input parameters such as modulus and strength. The plasticity portion of the orthotropic, threedimensional, macroscopic composite constitutive model is based on an extension of the Tsai-Wu composite failure model into a generalized yield function with a nonassociative flow rule. For the damage model, a strain equivalent formulation is used to allow for the uncoupling of the deformation and damage analyses. For the failure model, a tabulated approach is utilized in which a stress or strain based invariant is defined as a function of the location of the current stress state in stress space to define the initiation of failure. Failure surfaces can be defined with any arbitrary shape, unlike traditional failure models where the mathematical functions used to define the failure surface impose a specific shape on the failure surface. In the current paper, the complete development of the failure model is described and the generation of a tabulated failure surface for a representative composite material is discussed.

show abstract

“…Several models have been proposed during the last years to address the facts exposed in the previous paragraph. Some as Goldberg et al in [1][2] have developed a 1D shear plasticity models that allow for the input of piecewise stress-strain curves. Such model is already available in LS-DYNA non-linear finite element code as MAT_213.…”

Section: Introductionmentioning

confidence: 99%

On the Rate-dependent Plasticity Modelling of Unidirectional Fibre-reinforced Polymeric Matrix Composites

et al. 2018

View full text Add to dashboard Cite

Three different approaches to plasticity are investigated to model the experimentally-observed non-linear behaviour of unidirectional fibre-reinforced polymeric matrix materials. The first and simplest approach consists on assuming independent one-dimensional rate-dependent plasticity on in-plane (12) and through-thickness longitudinal (13) shear components of the Cauchy stress tensor. The second, employs a 3D extension of the plane stress Hill’48 anisotropic plastic surface. The third and the last is formulated as a quadratic yield function inspired by Puck’s fracture initiation criterion. It searches for a plastic localisation plane in which a certain combination of normal and shear stresses is maximum. Numerical simulations are conducted to analyse the off-axis compression behaviour of carbon fibre reinforced epoxy composite under varying loading rates. The afore-mentioned three different approaches are explored with an aim to predict the experimentally-observed non-linear response of such composites. The model parameters are determined using a deterministic inverse modelling strategy employing an iterative domain reduction optimisation technique. As far as the experiments are concerned, the quasi-static and medium rate tests were carried out in universal testing machines, while the experiments at high rate were conducted in a Split Hopkinson Pressure Bar system. The effectiveness in terms of accuracy and robustness of the three approaches are discussed.

show abstract

Development of an Orthotropic Elasto-Plastic Generalized Composite Material Model Suitable for Impact Problems

Cited by 30 publications

References 13 publications

Verification and Validation of a Three-Dimensional Orthotropic Plasticity Constitutive Model Using a Unidirectional Composite

Verification and Validation of a Three-Dimensional Orthotropic Plasticity Constitutive Model Using a Unidirectional Composite

Implementation of a Tabulated Failure Model into a Generalized Composite Material Model Suitable for Use in Impact Problems

On the Rate-dependent Plasticity Modelling of Unidirectional Fibre-reinforced Polymeric Matrix Composites

Contact Info

Product

Resources

About