Coronary-Artery
发表于 2025-3-21 16:57:17
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注意力集中
发表于 2025-3-21 22:23:09
A special theory of crack propagation,a behind his theory is that a crack will begin to propagate if the elastic energy released by its growth is greater than the energy required to create the fractured surfaces. As a model, Griffith considered the problem of a crack of length 2. in a plate under tension . as in Figure 1.1(a).
Cumbersome
发表于 2025-3-22 02:42:17
A three-dimensional strain energy density factor theory of crack propagation,ong time interval, depending on the temperature, rate of loading, and other variables present. A material that breaks after it has deformed appreciably may have lost its structural usefulness long before it actually separates. In this case, the initiation of yielding or plastic flow may represent fa
欺骗世家
发表于 2025-3-22 06:42:29
Strain energy density theory applied to plate-bending and shell problems,sense is said to occur by yielding if this stress reaches the elastic limit or yield point and by fracturing if the ultimate strength of the material is reached. Material elements within this member, however, are in a multiaxial stress state. Hence, yielding and/or fracture in the local sense or at
Mere仅仅
发表于 2025-3-22 09:26:59
,Dynamic crack problems — strain energy density fracture theory,cussions. This instability corresponds to the point at which a sudden change occurs in the creation of free surfaces. Physical examples include the initiation of stationary cracks and the bifurcation of moving cracks traveling at high speed. In general, two different aspects of dynamic fracture have
懒惰民族
发表于 2025-3-22 14:02:43
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争论
发表于 2025-3-22 18:21:38
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FRAX-tool
发表于 2025-3-22 21:56:05
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etiquette
发表于 2025-3-23 04:54:54
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过分自信
发表于 2025-3-23 06:29:28
Isoenergy density theory: exchange of surface and volume energy,thstanding the progress that has already been made in the past two decades, the fundamentals of the fracture process remain fragmented due to the lack of a generel theory. The performance limits and reliability objectives dealing with the application of advanced materials and structures have altered