An Energy Approach to a Micromechanics Model Accounting for Nonlinear Interface Debonding

Tan, Henry; Huang, Yingsong; Geubelle, Philippe H.; Liu, Cheng; Breitenfeld, Michael

doi:10.2514/6.2005-3995

Cited by 4 publications

(2 citation statements)

References 37 publications

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“…Such studies are needed in order to increase the safety of these materials in civil and military applications. The challenges in predicting the mechanical behaviour of PBXs up to failure are due to the filler volume fraction ( ) which can be in excess of 90 % (Banerjee and Adams, 2004), the highly non-linear, time-dependent behaviour of the matrix phase (Drozdov, 1999;Williamson et al, 2008) and the complex behaviour of the interface between the filler and matrix phases (Bailey et al, 1992;Tan et al, 2005;Xu et al, 2008). The damage mechanisms within and between the individual constituents and their contributions to macroscopic failure under a multitude of loading conditions including tension and compression in dynamic and quasi-static conditions continues to be a topic of current research interest (Ellis et al, 2005;Herrmann et al, 2015;Li et al, 2005;Liu et al, 2009;Wang et al, 2011;Yeager et al, 2014;Zhou et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Hierarchical multi-scale models for mechanical response prediction of highly filled elastic–plastic and viscoplastic particulate composites

Li-Mayer

Lewis

Connors

et al. 2020

Computational Materials Science

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Though a vast amount of literature can be found on modelling particulate reinforced composites and suspensions, the treatment of such materials at very high volume fractions (>90 %), typical of high performance energetic materials, remains a challenge. The latter is due to the very wide particle size distribution needed to reach such a high value of . In order to meet this challenge, multiscale models that can treat the presence of particles at various scales are needed. This study presents a novel hierarchical multiscale method for predicting the effective properties of elasto-viscoplastic polymeric composites at high . Firstly, simulated microstructures with randomly packed spherical inclusions in a polymeric matrix were generated. Homogenised properties predicted using the finite element (FE) method were then iteratively passed in a hierarchical multi-scale manner as modified matrix properties until the desired filler was achieved. The validated hierarchical model was then applied to a real composite with microstructures reconstructed from image scan data, incorporating cohesive elements to predict debonding of the filler particles and subsequent catastrophic failure.The predicted behaviour was compared to data from uniaxial tensile tests. Our method is applicable to the prediction of mechanical behaviour of any highly filled composite with a non-linear matrix, arbitrary particle filler shape and a large particle size distribution, surpassing limitations of traditional analytical models and other published computational models.

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Section: Introductionmentioning

confidence: 99%

Hierarchical multi-scale models for mechanical response prediction of highly filled elastic–plastic and viscoplastic particulate composites

Li-Mayer

Lewis

Connors

et al. 2020

Computational Materials Science

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“…CFEM has been used extensively for simulating the impact induced damage behavior of different composite materials [34][35][36][37][38][39][40], including energetic materials [22][23][24]41]. CFEM application to a material with unknown crack path can be approached in two ways; the first is to dynamically insert cohesive surfaces into the model as fracture develops and the second is to define all bulk element boundaries as cohesive surfaces.…”

Section: Cfem Frameworkmentioning

confidence: 99%

The effect of interface shock viscosity on the strain rate induced temperature rise in an energetic material analyzed using the cohesive finite element method

Prakash

Gunduz

Tomar

2019

Modelling Simul. Mater. Sci. Eng.

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In this work, shock induced failure and local temperature rise behavior of a hydroxyl-terminated polybutadiene (HTPB)—ammonium perchlorate (AP) energetic material is modeled using the cohesive finite element method (CFEM). Thermomechanical properties used in the model were obtained from four different experiments: (1) dynamic impact experimental measurements for fitting a viscoplastic constitutive model, (2) in situ mechanical Raman spectroscopy (MRS) measurements of the separation properties for fitting a cohesive zone model, (3) a pulse laser induced particle impact experiment combined with the MRS for measurement of the interface shock viscosity, and (4) Raman thermometry experiments for measurement of HTPB, AP, and HTPB-AP interface thermal conductivity. HTPB-AP interface regions with high density of particles were found to be more susceptible to local temperature rise due to the presence of viscoplastic dissipation as well as frictional heating. The increase in the interface shock viscosity lead to a decrease in both the viscoplastic and frictional dissipation. This resulted in a decrease in the maximum temperature and the density of local regions with a maximum temperature rise within the HTPB-AP microstructure. A power law relation for the decrease in viscoplastic energy dissipation, temperature rise and the density of the local temperature rise with the interface shock viscosity was obtained.

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Effect of interface chemistry and strain rate on particle-matrix delamination in an energetic material

Prakash

Gunduz²,

Oskay

et al. 2018

Engineering Fracture Mechanics

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An Energy Approach to a Micromechanics Model Accounting for Nonlinear Interface Debonding

Abstract: Approved for public release; distribution is unlimited.

Cited by 4 publications

References 37 publications

Hierarchical multi-scale models for mechanical response prediction of highly filled elastic–plastic and viscoplastic particulate composites

Hierarchical multi-scale models for mechanical response prediction of highly filled elastic–plastic and viscoplastic particulate composites

The effect of interface shock viscosity on the strain rate induced temperature rise in an energetic material analyzed using the cohesive finite element method

Effect of interface chemistry and strain rate on particle-matrix delamination in an energetic material

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