北京人起源
发表于 2025-3-25 03:59:31
Ductile Fracture,ucleation of cavities takes place on second-phase particles. Dislocations interaction or Eshelby model of local stresses in inclusions allow calculation of nucleation conditions. The heterogeneous nature of the distribution of second-phase particles involves establishing nucleation rate functions. V
LURE
发表于 2025-3-25 10:08:22
Ductile-Brittle Transition,and of the stress distribution are given, especially for the Charpy specimen. Testing procedure including instrumented impact testing are described. Various ductile-brittle transition temperatures (DBT) can be defined. They are related to metallurgical variables. Drop weight tests are more represent
Excitotoxin
发表于 2025-3-25 13:28:55
Fatigue,re described. Gigacycle fatigue tests method is also explained. Fatigue crack nucleation results from strain irreversibility. Cyclic loading modifies the dislocations arrangements. Inclusions can be initiation sites in fatigue. The propagation of long cracks is linked with the cyclic plastic zone at
钢笔尖
发表于 2025-3-25 17:28:24
Environment Assisted Cracking,s temperature dependent. So is the diffusion. At low temperatures traps control the diffusion of hydrogen. Supersaturation of hydrogen results in the precipitation of cavities. The modification of the surface energy results in hydrogen enhanced decohesion; its interaction with dislocations in hydrog
松软无力
发表于 2025-3-25 23:38:10
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剧本
发表于 2025-3-26 02:55:13
Contact Mechanics; Friction and Wear,re given: concentrated and distributed normal and tangential loads, point load, pressure on a circular surface, hertzian contact for normal and tangential loadings. The analysis of sliding fatigue allows understanding fretting fatigue. The onset of plastic deformation is treated in the case of slidi
拱墙
发表于 2025-3-26 05:12:17
Damage and Fracture of Non-metallic Materials,e damaged zone at the tip of cracks can be described by the fictitious crack model. Crack deflections and crack tip shielding mechanisms increase the fracture toughness. Size effects yield two different fracture regimes for short and long cracks. The fracture strength is statistically distributed. E
grudging
发表于 2025-3-26 10:49:55
Book 2013Latest editional with these they need to have command of the mechanics of material behaviour. This ought to reflect in the training of students. In this respect, the first volume of this work deals with elastic, elastoplastic, elastoviscoplastic and viscoelastic behaviours; this second volume continues with fract
inveigh
发表于 2025-3-26 16:23:07
0925-0042 ials, extending lifetimes and guarding against fracture in service are among the preoccupations of engineers, and to deal with these they need to have command of the mechanics of material behaviour. This ought to reflect in the training of students. In this respect, the first volume of this work dea
Expertise
发表于 2025-3-26 19:44:09
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