Effects of near-tip behavior of particulate composites on classical concepts

Smith, C. W.; Liu, C.T.

doi:10.1016/0961-9526(91)90037-s

Cited by 15 publications

(5 citation statements)

References 2 publications

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“…Iso-intensity contour plots of X-ray images at 9.5% applied strain (a) 2 min and 32 s (b) 8 min and 21 s findings, obtained from real-time X-ray data, are consistent with experimental findings reported by Smith and Liu [12] and Gonzalez and Knauss [11] in their study of local strain distribution near the crack tip in a highly filled polymeric material. As pointed out in [11] and [12], the intense strain zone, or the highly strained region, ahead of the crack tip is very small and the strain level outside the intense strain is approximately equal to the applied strain level. Under this condition, it is expected that if the applied strain level is below a critical value, it can be assumed that no significant damage will develop outside the intense strain zone.…”

Section: Resultssupporting

confidence: 86%

Monitoring Microstructural Evolution, Crack Formation, and Damage Characteristics near Crack Tip in a Highly Filled Elastomer-Using Digital Radiography X-ray Techniques

Liu

2006

Exp Mech

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In this study, the change of microstructure, the formation of cracks, and the change of damage characteristics near the tip of a propagating crack in a highly filled elastomer containing hard particles embedded in a rubbery matrix were investigated using digital radiography X-ray techniques. Experimental findings reveal that the degree of inhomogeneity of the material's microstructure and the number of nonpropagating cracks increase as the applied strain is increased. Also, the damage characteristics near the crack tip are highly dependent on the loading history.

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Section: Resultssupporting

confidence: 86%

Monitoring Microstructural Evolution, Crack Formation, and Damage Characteristics near Crack Tip in a Highly Filled Elastomer-Using Digital Radiography X-ray Techniques

Liu

2006

Exp Mech

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“…3d. These experimental findings, obtained from real-time x-ray data, are consistent with experimental findings reported by Smith et al (6) in their study of local strain distribution near the crack tip in a highly filled polymeric material. As pointed out by Smith and Liu, the intense strain zone, or the highly strained region, ahead of the crack tip is very small and the strain level outside the intense strain is approximately equal to the applied strain level.…”

Section: Resultssupporting

confidence: 82%

Monitoring Damage Characteristics in a Filled Elastomer under Cyclic Loading Using X-Ray Techniques

Liu¹,

Klynn²,

Thompson³

et al. 2005

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In this study, the damage fields near the crack tip in edge-cracked sheet specimens subjected to a constant strain rate of 0.05 min -1 were investigated using real-time radiographic techniques. During the tests, Lockheed-Martin Advanced Technology Center's high-energy real-time x-ray system (HERTIS) was used to monitor damage initiation and evolution processes near the crack tip. The experimental findings indicate that x-ray technique is a promising technique to monitor damage evolution during crack propagation.

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“…During the past years, the fracture behavior of particulate composites has been investigated experimentally [1][2][3][4]. The basic approach is to determine the kinetics of the crack growth in terms of the relationship between the crack growth rate da/dt and the Mode I stress intensity factor K I.…”

Section: Introductionmentioning

confidence: 99%

Predicting the Crack Growth Behavior in a Filled Elastomer

Liu¹,

Yen²,

Ching³

2006

AMM

Self Cite

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In this study, single-edge cracked uniaxial specimens with an initial crack length of 0.1 in. or 0.3 in. and wedge-shaped sheet specimens with an initial crack length of 0.3 in were tested at a constant displacement rate of 50 in/min under 1000 psi confining pressure. The specimens were made of a highly filled polymeric material, containing 86% by weight of hard particles embedded in a rubbery matrix, which was made of polybutadiene-acrylic acid-acrylonitrile rubber. The uniaxial crack growth data were used to develop a crack growth model, relating crack growth rate da/dt and Mode I stress intensity factor KI. The developed crack growth model was used to predict the crack growth behavior in the wedge-shaped specimen. The results of the analysis indicated that the predicted crack growth rate compared well with the experiment

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Effects of near-tip behavior of particulate composites on classical concepts

Cited by 15 publications

References 2 publications

Monitoring Microstructural Evolution, Crack Formation, and Damage Characteristics near Crack Tip in a Highly Filled Elastomer-Using Digital Radiography X-ray Techniques

Monitoring Microstructural Evolution, Crack Formation, and Damage Characteristics near Crack Tip in a Highly Filled Elastomer-Using Digital Radiography X-ray Techniques

Monitoring Damage Characteristics in a Filled Elastomer under Cyclic Loading Using X-Ray Techniques

Predicting the Crack Growth Behavior in a Filled Elastomer

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