Fracture toughness of a polycarbonate/acrylonitrile-butadiene-styrene blend by the ASTM E813 and hysteresis energy J integral methods: Effect of specimen thickness and side groove

Abstract The effect of gel on the fracture toughness of four PVC/NBR (50/50) blends was characterized by two different J- integral methods. Three of these blends are compatible blends with 33% acrylonitrile in NBRs, and the fourth with 21% acrylonitrile content, is an incompatible blend. Two types of gel are involved in this study microgels and macrogels. The J-integral methods are (1) conventional method proposed by Bagley and Landes and (2) crack initiation locus method proposed by Kim and Joe. The same load-displacement curves are used in both methods. However, the latter eliminates the energy dissipation away from the crack tip in the determination of Jc, while the former does not. Both methods produced almost the same results indicating that the energy dissipation away from the crack tip is negligible in these samples. The fracture toughness of a macrogel-containing blend is much greater than that of a microgel-containing blend, which, in turn, is only slightly greater than that of a gel-free blend. This implies that the two gel-containing blends have different fracture processes. The incompatible blend has the lowest fracture toughness due to weak interaction at the boundaries of the two phases.

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Effect of porosity and environment on the mechanical behavior of acrylic bone cement modified with acrylonitrile-butadiene-styrene particles: I. Fracture toughness

Journal of Biomedical Materials Research ◽

10.1002/(sici)1097-4636(1999)48:2<121::aid-jbm5>3.0.co;2-p ◽

1999 ◽

Vol 48 (2) ◽

pp. 121-127 ◽

Cited By ~ 45

Author(s):

M. M. Vila ◽

M. P. Ginebra ◽

F. J. Gil ◽

J. A. Planell

Keyword(s):

Fracture Toughness ◽

Mechanical Behavior ◽

Bone Cement ◽

Acrylonitrile Butadiene Styrene ◽

Acrylic Bone Cement ◽

Butadiene Styrene

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Finite Element Analyses for Thickness Effects on J-Integral Testing using Non-Standard Testing Specimens

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.261-263.693 ◽

2004 ◽

Vol 261-263 ◽

pp. 693-698

Author(s):

J.S. Kim ◽

Young Jin Kim ◽

S.M. Cho

Keyword(s):

Fracture Toughness ◽

Finite Element ◽

Three Dimensional ◽

Specimen Thickness ◽

J Integral ◽

Finite Element Analyses ◽

Single Edge ◽

Fracture Toughness Testing ◽

Standard Testing ◽

Toughness Testing

This paper compiles solutions of plastic η factors for standard and non-standard fracture toughness testing specimens, via detailed three-dimensional (3-D) finite element (FE) analyses. Fracture toughness testing specimens include a middle cracked tension (M(T)) specimen, SE(B), single-edge cracked bar in tension (SE(T)) and C(T) specimen. The ligament-to-thickness ratio of the specimen is systematically varied. It is found that the use of the CMOD overall provides more robust experimental estimation than that of the LLD, for all cases considered in the present work. Moreover, the estimation based on the load- CMOD record is shown to be insensitive to the specimen thickness, and thus can be used for testing a specimen with any thickness.

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