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Damage and life assessment of materials undergoing concurrent fatigue and cyclic plastic strain accumulation over asymmetric multiaxial stress cycles with various loading spectra

Damage and life assessment of materials undergoing concurrent fatigue and cyclic plastic strain accumulation over asymmetric multiaxial stress cycles with various loading spectra
在具有各种载荷谱的不对称多轴应力循环中经历并发疲劳和循环塑性应变累积的材料的损伤和寿命评估
批准号:
RGPIN-2016-04957
负责人:
VarvaniFarahani, Ahmad
金额:
$2.11万
依托单位:
依托单位国家:
加拿大
项目类别:
Discovery Grants Program - Individual
财政年份:
2017
资助国家:
加拿大
项目状态:
已结题
起止时间:
2017-01-01 至 2018-12-31

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英文摘要
The accumulated plastic strain over asymmetric stress cycles, referred as ratcheting, and gradual damage progress over fatigue cycles are the principal causes of failure in many engineering components and structures. The reported cost of catastrophic failure in engineering structures annually exceeds $150 billion due to the complexity in geometry of components/ structures and the severe loads they experience in service. Both fatigue and ratcheting phenomena progressively cause damage when they are coupled. Safety issues and expenses associated with failure of engineering materials, necessitate implementing a high degree of reliability in design and analysis against failure of materials by developing a robust fatigue-ratcheting damage approach.
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