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PREDICTION OF MULTI-AXIAL CREEP LIFE FOR P92 STEEL NOTCHED BARS BASED ON TIME-HARDENING MODEL AND SKELETAL POINT STRESS METHOD
A prediction method of multi-axial creep life was proposed for notched bar metal specimen. Based on the Time-Hardening creep model, the stress distribution was simulated in the notched part during creep process. On the minimum section of the notch, the position where stress kept constant during creep process was defined as "skeletal point". According to the relationship between uniaxial tensile creep lives and stresses, the von-Mises equivalent stress of "skeletal point" was used to predict the multi-axial creep life of notched bar. The multi-axial creep lives of different P92 steel notched bars were predicted by this method and European multi-axial creep code respectively. The precision of predicted creep lives of two kinds of method are equal. Furthermore, the proposed prediction method is more simple and convenient for engineering applications.
PREDICTION OF MULTI-AXIAL CREEP LIFE FOR P92 STEEL NOTCHED BARS BASED ON TIME-HARDENING MODEL AND SKELETAL POINT STRESS METHOD
A prediction method of multi-axial creep life was proposed for notched bar metal specimen. Based on the Time-Hardening creep model, the stress distribution was simulated in the notched part during creep process. On the minimum section of the notch, the position where stress kept constant during creep process was defined as "skeletal point". According to the relationship between uniaxial tensile creep lives and stresses, the von-Mises equivalent stress of "skeletal point" was used to predict the multi-axial creep life of notched bar. The multi-axial creep lives of different P92 steel notched bars were predicted by this method and European multi-axial creep code respectively. The precision of predicted creep lives of two kinds of method are equal. Furthermore, the proposed prediction method is more simple and convenient for engineering applications.
PREDICTION OF MULTI-AXIAL CREEP LIFE FOR P92 STEEL NOTCHED BARS BASED ON TIME-HARDENING MODEL AND SKELETAL POINT STRESS METHOD
ZENG Cheng (author) / LIU YuJie (author)
2019
Article (Journal)
Electronic Resource
Unknown
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