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- W196453460 abstract "Fractures can occur in pipelines, pressure vessels, ship hulls, and aircraft structures at stresses below the yield strength of the structural materials. Conventional design theories account for stress, material strength, and stress-concentration factors at fillets, corners, and holes. However, they do not consider the flaws and minute cracks inherent in all materials. When ductile materials such as aluminum, copper, and most steels are stressed, they deform plastically around the tips of these cracks and absorb local overloads. When a material cannot behave in a ductile manner--such as when it is near or below its transition temperature--strain rate is high (as in impact), or when the stress system is complex and the material is physically constrained--it can fail at a relatively low stress level. Thus, enter fracture mechanics. The concept of fracture mechanics recognizes these basic facts-- noncontinuity and nonhomogeneity--and provides a numerical method to account for minute cracks in materials. The fracture-mechanics design parameters are a toughness (energy-absorption) factor, applied stress, size of crack, operating temperature, and the ''state of stress''--which is often far more complex than usually assumed." @default.
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- W196453460 date "1971-07-22" @default.
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- W196453460 title "Fracture mechanics. Pt. 1. What is fracture mechanics" @default.
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