Theory of particle transport phenomena during fatigue and time-dependent fracture of materials based on mesoscale dynamics and their practical applications.
Theory of particle transport phenomena during fatigue and time-dependent fracture of materials based on mesoscale dynamics and their practical applications.
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DOI：
10.2183/pjab.96.029
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Yokobori AT Jr
中科院分区：
文献类型：
--
作者：
Yokobori AT Jr
在这项工作中，介观力学的金属，它的微观物理和宏观力学联系起来，建立。在实际应用中，利用位错群动力学、氢扩散、空位扩散等粒子输运现象理论，导出了用于定量预测循环寿命、疲劳、氢脆、高温蠕变等随时间变化的断裂行为的规律。此外，这些概念也被应用于估计血管壁的粘弹性恶化的程度，这是由时间依赖性机制，并用于诊断伴随着血管壁的粘弹性恶化的动脉瘤。在这些理论中，新的力学指标被推导出作为预测疲劳裂纹扩展寿命和材料缺口试样的时间相关断裂的主导因素，如氢脆和高温蠕变。此外，作为实际应用的一个例子，这些理论被应用于估计的粘弹性恶化和血管壁的混沌运动，这是密切相关的血管疾病，如动脉粥样硬化和动脉瘤的程度。此外，还提出了新的诊断指标，以供临床应用。
In this work, the mesoscale mechanics of metals, which links their microscopic physics and macroscopic mechanics, was established. For practical applications, the laws for quantitatively predicting life of cycle and time-dependent fracture behavior such as fatigue, hydrogen embrittlement, and high-temperature creep were derived using particle transport phenomena theories such as dislocation group dynamics, hydrogen diffusion, and vacancy diffusion. Furthermore, these concepts were also applied for estimating the degree of viscoelastic deterioration of blood vessel walls, which is dominated by a time-dependent mechanism, and for the diagnosis of aneurysm accompanied by the viscoelastic deterioration of the blood vessel wall. In these theories, new mechanical indexes were derived as dominant factors for predicting the life of fatigue crack growth and the time-dependent fracture of notched specimens of materials such as hydrogen embrittlement and high-temperature creep. Furthermore, as an example of a practical application, these theories were applied to estimate the degree of viscoelastic deterioration and chaotic motions of blood vessel walls, which are closely related to blood vessel diseases such as atherosclerosis and aneurysm. Moreover, new indexes to diagnose them were also proposed for clinical applications.
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影响因子：
1.3
作者：
Adachi, T;Yokobori, AT;Nikbin, K
通讯作者：
Nikbin, K
影响因子：
1.6
作者：
KANNINEN, MF;ROSENFIELD, AR
通讯作者：
ROSENFIELD, AR
影响因子：
9.4
作者：
Nagao, Akihide;Martin, May L.;Robertson, Ian M.
通讯作者：
Robertson, Ian M.
影响因子：
1.6
作者：
Ekaputra, I. M. W.;Kim, Woo-Gon;Kim, Eung-Seon
通讯作者：
Kim, Eung-Seon
影响因子：
1
作者：
Hayatsu, Yukihiro;Watanabe, Koyu;Saiki, Yoshikatsu
通讯作者：
Saiki, Yoshikatsu