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Time-dependent fatigue damage model under uniaxial and multiaxial loading at elevated temperature

โœ Scribed by Guo-Qin Sun; De-Guang Shang; Cheng-Shan Li

Publisher
Elsevier Science
Year
2008
Tongue
English
Weight
136 KB
Volume
30
Category
Article
ISSN
0142-1123

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โœฆ Synopsis

Based on fatigue damage mechanics, the computing time of time-dependent damage was defined with tension-compression strain rate and cycle period. A time-dependent fatigue damage model without hold-time was proposed based on the linear damage rule and fatigue tests at elevated temperature. The fatigue damage model at elevated temperature was divided into pure fatigue damage, damage caused by the time-dependent factors and interactive damage. The results of life prediction with the proposed damage model were within a factor of 2 for 2.25Cr-1Mo steel and 2.5 for 304 stainless steel under uniaxial and multiaxial loading at elevated temperature.

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โœ Jing Li; Zhong-ping Zhang; Qiang Sun; Chun-wang Li; Yan-jiang Qiao ๐Ÿ“‚ Article ๐Ÿ“… 2009 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 237 KB

## a b s t r a c t Based on the critical plane approach, a new damage parameter for multiaxial fatigue damage is presented. Both components of strain and stress are considered in this parameter. Thus, a new multiaxial fatigue damage model is given based on the critical plane approach. The capabili