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

A micro-mechanical composite material model is developed to simulate the behavior of unidirectional composites under impact loading conditions in the nonlinear finite element solver (LS-DYNA®). The nonlinear strain rate and pressure dependency in the composite material model is accounted by the resin, which uses previously developed state variable viscoplastic equations. These equations have been originally developed for metals; however, these are modified to account for the significant contributions of hydrostatic stresses typically observed in polymers. The material model also uses a continuum damage mechanics (CDM) based failure model to incorporate the progressive post-failure behavior. A set of Weibull distribution functions are used to quantify this behavior, and a methodology of assigning physical significance to the choice of damage/softening parameters used in these functions is presented. The impact response of composite laminate plates has been simulated and compared to the experiments. It has been observed that the predicted results compare favorably to the experiments.

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Analysis and Characterization of Damage Using a Generalized Composite Material Model Suitable for Impact Problems

Journal of Aerospace Engineering ◽

10.1061/(asce)as.1943-5525.0000854 ◽

2018 ◽

Vol 31 (4) ◽

pp. 04018025 ◽

Cited By ~ 2

Author(s):

Robert K. Goldberg ◽

Kelly S. Carney ◽

Paul DuBois ◽

Canio Hoffarth ◽

Bilal Khaled ◽

...

Keyword(s):

Composite Material ◽

Material Model ◽

Impact Problems

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

American Society for Composites 2017 ◽

10.12783/asc2017/15271 ◽

2017 ◽

Author(s):

ROBERT K. GOLDBERG ◽

KELLY S. CARNEY ◽

PAUL DUBOIS ◽

CANIO HOFFARTH ◽

BILAL KHALED ◽

...

Keyword(s):

Composite Material ◽

Material Model ◽

Failure Model ◽

Impact Problems

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Numerical Simulation of Thermoplastic Composite Material by ANSYS

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.279.181 ◽

2011 ◽

Vol 279 ◽

pp. 181-185 ◽

Cited By ~ 3

Author(s):

Guo Hua Zhao ◽

Qing Lian Shu ◽

Bo Sheng Huang

Keyword(s):

Numerical Simulation ◽

Composite Material ◽

Composite Structures ◽

Material Model ◽

General Purpose ◽

Thermoplastic Composite ◽

Finite Element Code ◽

Peek Composite ◽

Test Result ◽

Good Agreement

This paper proposes a material model of AS4/PEEK, a typical thermoplastic composite material, for the general purpose finite element code—ANSYS, which can be used to predict the mechanical behavior of AS4/PEEK composite structures. The computational result using this model has a good agreement with the test result. This investigation can lay the foundation for the numerical simulation of thermoplastic composite structures.

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Nonlinear Strain Rate Dependent Micro-Mechanical Composite Material Model for Crashworthiness Simulation

Advanced Composite Materials for Automotive Applications ◽

10.1002/9781118535288.ch8 ◽

2013 ◽

pp. 175-204

Author(s):

Ala Tabiei

Keyword(s):

Composite Material ◽

Strain Rate ◽

Material Model ◽

Nonlinear Strain ◽

Rate Dependent

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Study of the ballistic behaviour of UHMWPE composite material: experimental characterization and numerical simulation

EPJ Web of Conferences ◽

10.1051/epjconf/201818301051 ◽

2018 ◽

Vol 183 ◽

pp. 01051

Author(s):

Hakim Abdulhamid ◽

Paul Deconinck ◽

Pierre-Louis Héreil ◽

Jérôme Mespoulet

Keyword(s):

Numerical Simulation ◽

Composite Material ◽

Damage Model ◽

Material Model ◽

Polyethylene Composite ◽

Macro Scale ◽

Out Of Plane ◽

Peeling Strength ◽

Scale Levels ◽

The Impact

This paper presents a comprehensive mechanical study of UHMWPE (Ultra High Molecular Weight Polyethylene) composite material under dynamic loadings. The aim of the study is to provide reliable experimental data for building and validate the composite material model under impact. Four types of characterization tests have been conducted: dynamic in-plane tension, out-of-plane compression, shear tests and plate impact tests. Then, several impacts of spherical projectiles have been performed. Regarding the numerical simulation, an intermediate scale multi-layered model (between meso and macro scale levels) is proposed. The material response is modelled with a 3d elastic orthotropic law coupled with fibre damage model. The modelling choice is governed by a balance between reliability and computing cost. Material dynamic response is unconventional [1, 2]: it shows large deformation before failure, very low shear modulus and peeling strength. Numerical simulation has been used both in the design and the analysis of tests. Many mechanical properties have been measured: elastic moduli, failure strength and EOS of the material. The numerical model is able to reproduce the main behaviours observed in the experiment. The study has highlighted the influence of temperature and fibre slipping in the impact response of the material.

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Ultrasonic Bulk Waves Measurements for Defect Detection of Composite Materials

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.268.401 ◽

2017 ◽

Vol 268 ◽

pp. 401-406

Author(s):

Nurul Wahida Zainal Abidin Sham ◽

Md Supar Rohani

Keyword(s):

Composite Material ◽

Defect Detection ◽

Calculation Method ◽

Material Model ◽

Test Material ◽

Bottom Surface ◽

Bulk Wave ◽

Multilayered Composite ◽

Wave Measurements ◽

Percentage Difference

The defect detection in composite material is important for its quality control where the hidden defect such as crack, corrosion, notch, holes, void and porosity can develop. In this paper, the ultrasonic bulk wave measurements of longitudinal and shear waves are used to identify defect in the multilayered composite material. This study employs pulse echo technique and utilized angle beam transducer. The composite material model investigated in this contribution are made of 24 mm and 12 mm thick Aluminium plates with a width of 100 mm and a length of 203 mm which are separated with an approximately 1 mm thick oil layer. A simulated defect is created in the composite test material by drilling a hole with 2.5 mm diameter and 3 mm depth on the bottom surface of the third layer material. Finding indicates that the defect is located at 53.39 mm from transducer and the percentage difference of the defect location compared to the calculation method is 7%. It indicates that the proposed method can be use to detect defect in multilayered composite material within 10% accuracy compared to the calculation method.

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