scholarly journals Application of the Liu and Murakami Damage Model for Creep Crack Growth Predictions in Power Plant Steels

10.5772/57052 ◽  
2014 ◽  
Author(s):  
Christopher J. ◽  
Wei Sun ◽  
Thomas H. ◽  
Mohammed Saber ◽  
Adib A.
Keyword(s):  
Power Plant ◽  
Crack Growth ◽  
Damage Model ◽  
Creep Crack Growth ◽  
Creep Crack

Finite Element Damage Simulations for Creep Crack Growth of SS316H With Different Geometries

2011 ◽  
Author(s):  
Chang-Sik Oh ◽  
Nak-Hyun Kim ◽  
Han-Sang Lee ◽  
Yun-Jae Kim
Keyword(s):  
Experimental Data ◽  
Finite Element ◽  
Crack Growth ◽  
Creep Test ◽  
Damage Model ◽  
Creep Crack Growth ◽  
Test Results ◽  
Creep Ductility ◽  
Creep Crack ◽  
Crack Growth Rates

In this paper, creep crack growth simulations were performed based on finite element (FE) damage simulations for several types of test specimens such as C(T), CS(T), SEN(T), M(T) and SEN(B). The Graham-Walles creep law was adopted to describe all three phases of creep. The Creep parameters were obtained from uni-axial creep test results of SS316H at 550°C. Damage model was also included based on creep ductility exhaustion concept, which is defined as the ratio of creep strain to the multi-axial creep ductility. Creep crack growth rates resulting from FE simulations were compared with the experimental data.

scholarly journals Finite element simulation of creep crack growth using combined plastic-creep damage model

2016 ◽  
Vol 2 ◽  
pp. 825-831 ◽  
Author(s):  
Dong-Jun Kim ◽  
Kyung-Dong Bae ◽  
Han-Sang Lee ◽  
Yun-Jae Kim ◽  
Goon-Cherl Park
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Crack Growth ◽  
Damage Model ◽  
Creep Crack Growth ◽  
Creep Damage ◽  
Creep Crack ◽  
Element Simulation ◽  
Creep Damage Model ◽  
Plastic Creep

Creep crack growth behavior analysis of the 9Cr-1Mo steel by a modified creep-damage model

2017 ◽  
Vol 708 ◽  
pp. 68-76 ◽  
Author(s):  
Yu-Cai Zhang ◽  
Wenchun Jiang ◽  
Shan-Tung Tu ◽  
Xian-Cheng Zhang ◽  
You-Jun Ye
Keyword(s):  
Behavior Analysis ◽  
Crack Growth ◽  
Damage Model ◽  
Creep Crack Growth ◽  
Creep Damage ◽  
Growth Behavior ◽  
Crack Growth Behavior ◽  
Creep Crack ◽  
Creep Damage Model

Numerical Investigation on Creep Crack Growth of Brazed Joint Using Different Damage Models

2016 ◽  
Vol 853 ◽  
pp. 231-235
Author(s):  
Yun Luo ◽  
Qian Zhang ◽  
Wen Chun Jiang
Keyword(s):  
Crack Initiation ◽  
Crack Growth ◽  
Rupture Life ◽  
Damage Model ◽  
Creep Crack Growth ◽  
Creep Damage ◽  
Initiation Time ◽  
Creep Crack ◽  
Damage Models ◽  
Brazed Joint

In this paper, four types of creep damage models (Kachanov-Robotnov, Liu-Murakami, Cocks-Ashby and Wen-Tu model) were used to study the creep crack growth (CCG) behavior in compact tension (CT) specimen of Hastelloy C-276/BNi-2 brazed joint. The results show that the creep damage model has a great influence on the CCG behavior of brazed joint. The crack-tip stress states, da/dt-C* curves, crack initiation time and rupture life are different for the different damage models. The Kachanov-Rabotnov model can lead to higher CCG rate and shorter rupture life, while the Cocks and Ashby model can reduce CCG rate and prolong the rupture life. The model order in terms of the CCG rate from high to low is K-R, L-M, W-T, C-A model, which is opposite order of crack initiation time. In the simulation of CCG of brazed joint, a precious damage model should be employed for life prediction.

scholarly journals Creep crack growth in power plant materials

Sadhana ◽  
1995 ◽  
Vol 20 (1) ◽  
pp. 53-85 ◽  
Author(s):  
Parmeet S Grover ◽  
Ashok Saxena
Keyword(s):  
Power Plant ◽  
Crack Growth ◽  
Creep Crack Growth ◽  
Plant Materials ◽  
Creep Crack

A damage model of creep crack growth in polycrystals

1983 ◽  
Vol 31 (10) ◽  
pp. 1675-1687 ◽  
Author(s):  
M.D. Thouless ◽  
C.H. Hsueh ◽  
A.G. Evans
Keyword(s):  
Crack Growth ◽  
Damage Model ◽  
Creep Crack Growth ◽  
Creep Crack

Prediction of Creep Crack Growth for Modified 9Cr-1Mo at 600°C

2012 ◽  
Author(s):  
Nak Hyun Kim ◽  
Yun Jae Kim ◽  
Woo Gon Kim ◽  
Hyeong Yeon Lee
Keyword(s):  
Prediction Model ◽  
Crack Growth ◽  
Damage Model ◽  
Creep Crack Growth ◽  
Creep Damage ◽  
Compact Tension ◽  
Compact Tension Specimen ◽  
Element Analysis ◽  
Creep Ductility ◽  
Creep Crack

This paper introduce theoretical creep crack growth prediction model and provides experimental validation of the approach for simulating creep crack growth using finite element analysis method, recently proposed by the authors. The FE creep damage model is based on the creep ductility exhaustion concept, and incremental damage is defined by the ratio of incremental creep strain and multi-axial creep ductility. A simple linear damage summation rule is applied. When accumulated damage becomes unity, element stresses are reduced to zero to simulate progressive crack growth. For validation, simulated results are compared with experimental data for a compact tension specimen of modified 9Cr-1Mo at 600°C under various loading levels. The simulated results agree well with experimental C*-da/dt data. The test data are also compared with theoretical CCG prediction model.

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