Macro-Micro Mechanical Behavior of a Highly-Particle-Filled Composite Using Digital Image Correlation Method

Chen, Pengwan; Zhou, Zhongbin; Huang, Fenglei

doi:10.5772/21613

Cited by 8 publications

(11 citation statements)

References 30 publications

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“…These phenomena can be more clearly seen in the fracture route of the sample (see Figure 10). The above results are obviously different from the microscopic failure modes because of tensile stress observed in Brazilian test [29] (see Figure 9), in which the crack path mainly follows the boundaries of large particles, and the particle fracture is rare. The predominant failure mode of debonding under tensile stress was also observed by Palmer et al [2] and Rae et al [14].…”

Section: Microscopic Damage Examination and Analysis From Strain Distcontrasting

confidence: 70%

Study on Fracture Behaviour of a Polymer‐Bonded Explosive Simulant Subjected to Uniaxial Compression Using Digital Image Correlation Method

Zhou

Chen

Duan

et al. 2012

Strain

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Quasi‐static uniaxial compression experiments were conducted on a polymer‐bonded explosive (PBX) simulant. At macro‐scale, the deformation and fracture process of samples were recorded using a charge‐coupled‐device camera. Microscopic examination was conducted to in situ observe the deformation and fracture processes of samples using SEM equipped with a loading stage. Microscopic damage modes, including interfacial debonding and particle fracture, were observed. The digital image correlation (DIC) technique was used to calculate the recorded images, and the macro‐ and micro‐scale displacement and strain fields were determined. Crack initiation, crack propagation, fracture behaviour and failure mechanism of samples were studied. The effects of aspect ratios on fracture behaviour and failure mechanism of PBX simulant were analysed.

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Section: Microscopic Damage Examination and Analysis From Strain Distcontrasting

confidence: 70%

Study on Fracture Behaviour of a Polymer‐Bonded Explosive Simulant Subjected to Uniaxial Compression Using Digital Image Correlation Method

Zhou

Chen

Duan

et al. 2012

Strain

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“…Several studies have been conducted by scientists at Los Alamos and Lawrence Livermore National Laboratories to characterize the properties of energetic materials using 2D DIC [47][48][49]. Most studies have focused on the tensile, compressive, thermal, fracture, and failure properties of these materials [50]. A particular novel use of 3D DIC is to study the multiaxial (volumetric and deviatoric) constitutive and damage behavior of PBX using a notched specimen under compression.…”

Section: Technical Approachmentioning

confidence: 99%

“…Many quantitative studies on the fracture resistance of PBXs have been performed. Chen et al performed SCB fracture tests on a generic PBX simulant to calculated plain strain fracture toughness, Ic K and determined that the dominant fracture mode is decohesion of the particlebinder interface [4]. The researchers then performed a comparative study of the fracture toughness of three-point bending, semi-circular bending (SCB), and flattened Brazilian disc tests and determined that the fracture toughness of PBX is consistent irrespective to specimen geometry [7].…”

Section: Introductionmentioning

confidence: 99%

“…This tortuous cracking process creates a large plastic zone that exceeds the small-scale plasticity limitation of linear elastic fracture mechanics (LEFM). Fracture toughness has continued to be applied to analyze the fracture resistance of PBXs despite the deficits of LEFM [4][5][6][7][8][9]. As an alternative, elastic-plastic fracture mechanics (EPFM) can be introduced to measure the fracture resistance.…”

Section: Introductionmentioning

confidence: 99%

“…Strain field distribution on PBX simulants, in particular near notch tip for different compositions has been analyzed to evaluate deformation pattern by Digital image correlation (DIC) method. It is a non-contact displacement measurement technique [4]. Quantitative and qualitative studies on the fracture behavior of PBX have been performed using DIC.…”

Section: Introductionmentioning

confidence: 99%

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Novel Method to Characterize and Model the Multiaxial Constitutive and Damage Response of Energetic Materials.

Kaneshige

Rabbi

Mach

et al. 2017

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Simulant polymer bonded explosives are widely used to simulate the mechanical response of real energetic materials. In this paper, the fracture resistance of a simulant polymer bonded explosive (PBX) is experimentally investigated. The simulant is composed of 80 wt.% soda lime glass beads (SLGB) and 20 wt.% high impact Polystyrene 825 (HIPS). Brazilian disk tests are performed to characterize the tensile and compressive properties. Fracture toughness and energy tests are performed in the semi-circular bending (SCB) configuration on 80, 81, 82, and 83 wt% SLGB compositions. Digital image correlation is performed to record the surface displacements and calculate surface strains during testing. The micromechanical behavior of ductile and brittle fracture are evaluated using digital microscopy and scanning electron microscopy of the fracture surface. It is determined that (i) the manufacturing process produces a credible simulant of PBX properties, and (ii) the SCB test measures fracture resistance with a reasonable coefficient of variation. 4 ACKNOWLEDGMENTS This project is supported by Sandia National Laboratories. We are truly thankful to Michael J. Kaneshige for his unconditional support during this time period. We would also like to express our gratitude to him for providing insight, knowledge, and expertise that assisted the research greatly. His comments on our newly developed novel method of manufacturing mock energetic materials, mechanical testing methods, and digital image correlation technique helped us to understand the sources of uncertainty in our experiments. We are also thankful to Jaime Moya and Vieta M. Crain from Sandia National Laboratories for their cooperation. This research work would not have been possible without our advisor Dr. Calvin M. Stewart's countless support, guidance, and feedback. He mentored us throughout the process, providing encouragement to solve in-situ problems and constantly inspire us with his broad vision. We appreciate his time and effort to make this research successful. We greatly acknowledge the chair of the Mechanical Engineering department Professor Ahsan R. Chowdhury for providing the facility and proper environment to conduct research and arranging useful training on time to time basis. We are also grateful to Dr. David Roberson for helping us in the early days of developing a manufacturing process for our mock energetics. We deeply appreciate our research team who gave suggestion at various stages of this research.

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Meso-scale Deformation Mechanisms of Polymer Bonded Energetic Materials Under Dynamic Loading

Ravindran

Tessema

Kidane

2016

Conference Proceedings of the Society for Experimental Mechanics Series

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Macro-Micro Mechanical Behavior of a Highly-Particle-Filled Composite Using Digital Image Correlation Method

Cited by 8 publications

References 30 publications

Study on Fracture Behaviour of a Polymer‐Bonded Explosive Simulant Subjected to Uniaxial Compression Using Digital Image Correlation Method

Study on Fracture Behaviour of a Polymer‐Bonded Explosive Simulant Subjected to Uniaxial Compression Using Digital Image Correlation Method

Novel Method to Characterize and Model the Multiaxial Constitutive and Damage Response of Energetic Materials.

Meso-scale Deformation Mechanisms of Polymer Bonded Energetic Materials Under Dynamic Loading

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