a我在想是不是我真的不好? I in want to be I am not really good?[translate] abus type 正在翻译,请等待... [translate] aIn materials science,fatigue is progressive and localized structural damage that occurs when a material is subjected to cyclic loading. 正在翻译,请等待... ...
In a specimen subjected to a cyclic load, a fatigue crack nucleus can be initiated on a microscopically small scale, followed by crack grows to a macroscopic size, and finally to specimen failure in the last cycle of the fatigue life. In the present chapter the fatigue phenomenon will be ...
The paper surveys the historical development of scientific and engineering knowledge about fatigue of materials and structures in the 20th century. This includes fatigue as a material phenomenon, prediction models for fatigue properties of structures, and load spectra. The review leads to an inventory ...
A fatigue limit criterion, based on th... S.,USAMI*,S.,... - 《Fatigue & Fracture of Engineering Materials & Structures》 被引量: 133发表: 1979年 A model for the initiation of dynamic recrystallization in two-phase materials A material model is presented for the prediction of the ...
aIt is breakage by material fatigue generating the loss of performance following to application of a certain number of stresses under loads in order. 它是破损由引起表现的损失物质疲劳跟随到一定数量的重音的应用在装载之下按顺序。[translate]
I: The Net-AM material has exceptionally high fatigue resistance. II: Researchers and engineers in optimizing the printing processes (OPP) and optimizing the post-treatments (OPT) can also achieve ultra-high fatigue properties respectively through continuously reducing voids and further refining microstru...
The corresponding fatigue size effects and damage mechanisms are discussed. The prospective research directions of fatigue of small dimensional materials in the future are forecasted. 展开 关键词: small dimensional material fatigue damage size effect dislocation structure 被引量: 52 年份: 2005 ...
Many of these issues require good knowledge of material properties and of how to use these in the design process. Some of these relate to fatigue which is of major concern in all parts of a development programme. However, while some fatigue problems have been extensively studied, some have ...
or stress for a given run-out cyclic life, then becomes the design parameter for a structural material in the absence of a pre-existing notch or other stress concentration feature. For high integrity defect-free titanium alloys, bearing steels or powder metallurgy nickel superalloys, crack nucleati...
PURPOSE:To manufacture a hot forded material having excellent fatigue strength by using a steel contg. specified wt.% of C, Si, Mn, Cr, Al, and V and the balance Fe, executing hot forging and thereafter cooling it at a specified tamp. at a specified cooling rate. CONSTITUTION:A steel ...