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The concepts of fracture mechanics are basic ideas for developing the methods of predicting the load-carrying capabilities of structures and components containing cracks. This article provides an introduction to the methodology for computing the onset of fracture and describes plane strain fracture toughness, denoted as KIC. It presents formulas for the stress-intensity parameter as a function of crack size, crack shape, applied stress (or load), and geometry of load application.

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Stephen D. Antolovich, Bruce F. Antolovich, 1996. "An Introduction to Fracture Mechanics", Fatigue and Fracture

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