Topic
Fracture toughness
About: Fracture toughness is a research topic. Over the lifetime, 39642 publications have been published within this topic receiving 854338 citations.
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TL;DR: In this paper, the critical stress intensity factor and related parameters have been measured in three-point bending for 18 different combinations of different volume fractions of cobalt and grain size of tungsten carbide.
Abstract: Critical stress intensity factor, and related parameters have been measured in three-point bending for 18 different combinations of different volume fractions of cobalt (5 to 37%) and grain size of tungsten carbide (0.7, 1.1 and 2.2 μm). In particular, a study was made of the correlations between the strength and mechanical and microstructural parameters, such as ¯LCo,CWC, ¯LCo/¯DWC, ¯LCo2/¯DWC,HV and wear resistance. A hypothesis for the mechanism of fracture has been proposed following an analysis of these results and a study of the mode of fracture.
199 citations
TL;DR: In this paper, a two-parameter model with a characteristic toughness and a characteristic strength can be used to predict the fracture of notched or cracked specimens, which can be determined by comparing numerical predictions to experimental observations of a fracture test.
199 citations
TL;DR: In this paper, a model of crack growth in an elastic-plastic solid is studied by a computational model, in which a cohesive zone model is used to characterize the fracture process and an effect of plastic straining, reducing the peak stress for separation, is incorporated.
198 citations
TL;DR: In this article, a method to simultaneously measure fracture initiation toughness, fracture energy, fracture propagation toughness, and fracture velocity was proposed for mode-I fractures in split Hopkinson pressure bar (SHPB) testing with a notched semi-circular bend (SCB) specimen.
198 citations
TL;DR: In this paper, the fracture energy of hybrid carbon fiber reinforced polymers was investigated and the composites were modified by the addition of multi-walled carbon nanotubes into the matrix material.
Abstract: In the present study, the fracture energy of hybrid carbon fiber reinforced polymers was investigated. The composites were modified by the addition of multi-walled carbon nanotubes into the matrix material. The interlaminar fracture properties under Mode I and Mode II remote loading were studied as a function of the carbon nanotube content in the matrix. With the addition of carbon nanotubes in the epoxy matrix, a significant increase in the load bearing ability as well as in the fracture energy was observed, for both Mode I and Mode II tests. It is speculated that carbon nanotubes due to their large aspect ratio have a significant toughening effect since extra energy is needed in order to pull them out from the matrix and start the crack propagation following a kinking out pattern at nanoscale.
198 citations