Critical stress for crack propagation in concreteLuboš NáhlíkL. Nahlik, Z. Knesl, Critical stress for cracks propagation in concrete, Proceedings of conference Problems of modelling, Ostrava-Poruba, 2002, pp. 65-71.
acontrol mode in a quasi-hierarchical structure. 控制方式在一个类似等级制度的结构。[translate] aFracture toughness (Kc). Critical value of the stress intensity factor for which crack extension occurs. 破裂韧性 (Kc)。 裂缝引伸发生应力强度因素的临界值。[translate]...
Therefor e it was reasoned that da Ba (5) the intensity of the crack-tip stress field as represented by k dN should control the rate of crack extension.4 That is to say : where B is a functio n of the applied stresses. The n they ob - served that in order t o fit their ...
Fracture toughness is denoted by the critical stress intensity factor K1c at the tip of a crack required for crack propagation in a simple crack opening mode. The following is the well-known Griffith relationship for cracking: (17.15)K1c=σc·πaY where σc is the ultimate fracture strength ...
PropagationLaws Crack-propagationlawsgivenintheliteraturetakemany forms. Ingeneraltheytreatcracksininfinitesheetssubjected toauniformstressperpendiculartothecrack(orcanbeapplied tothatconfiguration)andtheyrelatethecracklength,2a,tothe numberofcyclesofloadapplied,N,withthestressrangecr,and materialconstantsC,-.' ...
2.Study of Critical State of Crack Propagation in Hydrogenation Reactor加氢反应器裂纹扩展临界状态的研究 3.at the margin: The last point of production or consumption.处于边际,处于临界状态:处于生产或消费的临界点。 4.As soon as this critical state has been reached, an adjacent state becomes possibl...
5.Both will break at the same critical state of stress.两者将在相同的临界压力状态下破碎。 6.Condition Analysis of Boiler Equipment on Guohua 600MW Supercritical Unit国华600MW超临界机组锅炉设备状态分析 7.Study of Critical State of Crack Propagation in Hydrogenation Reactor加氢反应器裂纹扩展临界状态的...
Additionally, simulation on a model ZrO2-containing SiO2-based glass-ceramic shows that the stress fields around the running crack front can help triggering ZrO2 phase transformation, and consequently change the stress in ZrO2 from tensile to compressive and deflect the crack propagation. The insights...
Initial Crack (Flaw) Size: The crack size that is assumed to exist at the beginning of a damage tolerance analysis, as determined by NDE or proof testing. K: Stress intensity factor. Kc: Critical stress intensity factor for fracture. Limit Load: The maximum load expected on the hardware dur...
aThen, the final stage (III) of fatigue fracture is caused by a dynamic crack propagation mechanism, in which the applied maximum stress intensity factor reaches a critical value equals to the plane stress or plane strain fracture toughness of the material. 然后,最后阶段(III)疲劳断口是由一个动...