Delayed Fracture of High-strength Bolts

Fatigue Fracture of High-Strength Concrete and Size Effect

Results of an cxperimelllal srudy ,,(fatiguefmelllre of geometrical/y similar high·strength concrete specimens of ven different si~es are reported and anal\'~ed. Three·poilll bend notched hean1.1 1.5. 4.24. and J:! in. deep were subjected 10 eselic loading H'ith a "m'er load limit of O.07Pc and an upper limiT het1l'een 0.73 and O.1!4 Pc. where Pc = maximum load ill monOlonic loading. The number...

Delayed fracture in gels

Subject to a subcritical load, a swollen polymeric gel may hesitate for a prolonged period of time without showing any macroscopic symptom, and then break suddenly. Such a phenomenon is usually referred to as the delayed fracture in gels. In this paper, we present a possible mechanism for the delayed fracture in gels from the continuum and fracture mechanics point of view. Using a continuum vis...

A universal fracture criterion for high-strength materials

High-Strength Bainitic Steels

With careful design, mixed microstructures consisting of fine plates of upper bainitic ferrite separated by thin films of stable retained austenite have exhibited impressive combinations of strength and toughness in highsilicon bainitic steels. The silicon suppresses the precipitation of brittle cementite leading to an improvement in toughness. The essential principles governing the optimisatio...

مقایسه fracture strength دندان های قدامی شکسته شده پس از اعمال تکنیک های مختلف re-attachment

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