基于损伤力学的TMSR-LF1堆容器接管非弹性蠕变损伤分析
|
摘要
钍基熔盐液态实验堆(Thorium Molten Salt Reactor-Liquid Fuel 1,TMSR-LF1)反应堆压力容器(简称"堆容器")长期在650°C的高温下服役,对其进行蠕变损伤分析至关重要。本文旨在采用非弹性分析方法进行TMSR-LF1堆容器接管的蠕变损伤计算与评估。基于损伤力学理论,通过拟合650°C下UNS N10003合金的蠕变试验数据,得到了Lemaitre多轴蠕变损伤模型的材料常数。蠕变断裂寿命的理论预测值与试验结果基本吻合,最大误差7.38%。然后通过有限元分析,得到了TMSR-LF1堆容器接管正常运行工况下的等效应力,并根据Lemaitre多轴蠕变损伤模型得到了非弹性蠕变损伤值。计算结果表明:TMSR-LF1堆容器接管在10年寿期内的最大蠕变损伤约0.082,满足限值要求。
[Background] The reactor pressure vessel(RPV) of thorium molten salt reactor-liquid fuel 1(TMSRLF1) has been designed to operate at 650 °C for long-term period, therefore, it is extremely important to analyze its creep damage. [Purpose] This study aims to calculate and assess the creep damage of the RPV nozzle in TMSR-LF1 with an inelastic analysis method. [Methods] Based on damage mechanics theory, firstly, the material constants of Lemaitre multi-axial creep damage model are obtained by fitting the creep test data of UNS N10003 alloy at 650 °C.Then the equivalent stress and creep damage of the RPV nozzle in TMSR-LF1 under normal operating conditions are calculated by finite element analysis. [Results] The theoretical prediction values of creep fracture life are basically consistent with the experimental results, with a maximum error of 7.38%. The calculation results indicate that the maximum creep damage of the RPV nozzle in TMSR-LF1 reaches 0.082, which meets the 10-year life limit requirement. [Conclusions] The analysis method and results have certain reference value for the structural integrity evaluation of elevated temperature equipment in TMSR.
[Background] The reactor pressure vessel(RPV) of thorium molten salt reactor-liquid fuel 1(TMSRLF1) has been designed to operate at 650 °C for long-term period, therefore, it is extremely important to analyze its creep damage. [Purpose] This study aims to calculate and assess the creep damage of the RPV nozzle in TMSR-LF1 with an inelastic analysis method. [Methods] Based on damage mechanics theory, firstly, the material constants of Lemaitre multi-axial creep damage model are obtained by fitting the creep test data of UNS N10003 alloy at 650 °C.Then the equivalent stress and creep damage of the RPV nozzle in TMSR-LF1 under normal operating conditions are calculated by finite element analysis. [Results] The theoretical prediction values of creep fracture life are basically consistent with the experimental results, with a maximum error of 7.38%. The calculation results indicate that the maximum creep damage of the RPV nozzle in TMSR-LF1 reaches 0.082, which meets the 10-year life limit requirement. [Conclusions] The analysis method and results have certain reference value for the structural integrity evaluation of elevated temperature equipment in TMSR.
引文
1 ASME boiler and pressure vessel code,section IIIdivision 1-subsection NH,class 1 components in elevated temperature service,rules for construction of nuclear facility components[S].New York:the American Society of Mechanical Engineers,2017.
2 Lemaitre J.How to use damage mechanics[J].Nuclear and Engineering and Design,1984,80:233?245.DOI10.1016/0029-5493(84)90169-9.
3 Chaboche J L.Continuum damage mechanics,Part II[J]Transaction of the ASME-Journal of Applied Mechanics1988,55(1):65?72.DOI:10.1115/1.3173662.
4 Becker A A,Hyde T H,Sun W,et al.Benchmarks for finite element analysis of creep continuum damage mechanics[J].Computational Matieral Science,2002,2534?41.DOI:10.1016/S0927-0256(02)00247-1.
5 Hyde T H,Xia L,Becker A A.Prediction of creep failure in aeroengine materials under muti-axial stress states[J]International Jounal of Mechanical Sciences,1966,38(4)385?403.DOI:10.1016/0020-7403(95)00063-1.
6荆建平,夏松波,孙毅,等.高温蠕变分析的非线性连续损伤力学模型[J].推进技术,2001,22(2):139?142.DOI10.3321/j.issn:1001-4055.2001.02.015.JING Jianping,XIA Songbo,SUN Yi,et al.Nonlinear continuum damage mechanics model on high temperature creep analysis[J].Journal of Propulsion Technology2001,22(2):139?142.DOI:10.3321/j.issn:1001-40552001.02.015.
7王立滨,荆建平,孙毅,等.损伤力学方法在汽轮机高温蠕变损伤分析中的应用[J].汽轮机技术,2002,44(2):88?90.DOI:10.3969/j.issn.1001-5884.2002.02.009.WANG Libin,JING Jianping,SUN Yi,et al.Application of damage mechanics on high temperature creep analysis of turbine[J].Turbine Technology,2002,44(2):88?90.DOI:10.3969/j.issn.1001-5884.2002.02.009.
8 Lemaitre J,Plumtree A.Application of damage concepts to predict creep-fatigue failures[J].Journal of Engineering Materials and Technology-Transactions of the ASME,1979,101(3):284?292.DOI:10.1115/1.3443689.
9 Lemaitre J.Damage modeling for prediction of plastic or creep fatigue failure in structures[R].Berlin:Commission of the European Communities,1979.
10 Lemaitre J.A continuous damage mechanics model for ductile fracture[J].Transactions of the Asme Journal of Engineering,1985,107(107):83?89.DOI:10.1115/1.3225775.
11 Lemaitre J.How to use damage mechanics[J].Nuclear Engineering and Desigin,1984,80(2):233?245.DOI:10.1016/0029-5493(84)90169-9.
12 Lemaitre J.Coupled elasto-plasticity and damage constitutive equations[J].Computer Methods in Applied Mechanics&Engineering,1985,51(1):31?49.DOI:10.1016/0045-7825(85)90026-X.
13余天庆,钱济成.损伤理论及应用[M].北京:国防工业大学出版社,1993.YU Tianqing,QIAN Jicheng.Damage theory and its appilication[M].Beijing:National Defense Industry Press,1993.
14王飞,郭万林.钛合金材料IMI834高温蠕变和蠕变断裂的连续损伤力学分析[J].机械强度,2005,27(4):530?533.DOI:10.3321/j.issn:1001-9669.2005.04.024.WANG Fei,GUO Wanlin.Continuum damage mechanics analysis of high temperature creep and creep fracture for titanium alloy IMI834[J].Journal of Mechanical Strength,2005,27(4):530?533.DOI:10.3321/j.issn:1001-9669.2005.04.024.
15蔡翔舟,戴志敏,徐洪杰.钍基熔盐堆核能系统[J].物理,2016,45(9):578?590.DOI:10.7693/wl20160904.CAI Xiangzhou,DAI Zhimin,XU Hongjie.Thorium molten salt reactor nuclear energy system[J].Physics,2016,45:578?590.DOI:10.7693/wl20160904.
16 Jing J P,Meng G,Sun Y,et al.An effective continuum damage mechanics model for creep-fatigue life assessment of a steam turbine rotor[J].International Jounal of Pressure Vessel and Piping,2003,80:389?396.DOI:10.1016/S0308-0161(03)00070-X.
17 ASME boiler and pressure vessel code,section II,part D,properties[S].New York:the American Society of Mechanical Engineers,2017.
2 Lemaitre J.How to use damage mechanics[J].Nuclear and Engineering and Design,1984,80:233?245.DOI10.1016/0029-5493(84)90169-9.
3 Chaboche J L.Continuum damage mechanics,Part II[J]Transaction of the ASME-Journal of Applied Mechanics1988,55(1):65?72.DOI:10.1115/1.3173662.
4 Becker A A,Hyde T H,Sun W,et al.Benchmarks for finite element analysis of creep continuum damage mechanics[J].Computational Matieral Science,2002,2534?41.DOI:10.1016/S0927-0256(02)00247-1.
5 Hyde T H,Xia L,Becker A A.Prediction of creep failure in aeroengine materials under muti-axial stress states[J]International Jounal of Mechanical Sciences,1966,38(4)385?403.DOI:10.1016/0020-7403(95)00063-1.
6荆建平,夏松波,孙毅,等.高温蠕变分析的非线性连续损伤力学模型[J].推进技术,2001,22(2):139?142.DOI10.3321/j.issn:1001-4055.2001.02.015.JING Jianping,XIA Songbo,SUN Yi,et al.Nonlinear continuum damage mechanics model on high temperature creep analysis[J].Journal of Propulsion Technology2001,22(2):139?142.DOI:10.3321/j.issn:1001-40552001.02.015.
7王立滨,荆建平,孙毅,等.损伤力学方法在汽轮机高温蠕变损伤分析中的应用[J].汽轮机技术,2002,44(2):88?90.DOI:10.3969/j.issn.1001-5884.2002.02.009.WANG Libin,JING Jianping,SUN Yi,et al.Application of damage mechanics on high temperature creep analysis of turbine[J].Turbine Technology,2002,44(2):88?90.DOI:10.3969/j.issn.1001-5884.2002.02.009.
8 Lemaitre J,Plumtree A.Application of damage concepts to predict creep-fatigue failures[J].Journal of Engineering Materials and Technology-Transactions of the ASME,1979,101(3):284?292.DOI:10.1115/1.3443689.
9 Lemaitre J.Damage modeling for prediction of plastic or creep fatigue failure in structures[R].Berlin:Commission of the European Communities,1979.
10 Lemaitre J.A continuous damage mechanics model for ductile fracture[J].Transactions of the Asme Journal of Engineering,1985,107(107):83?89.DOI:10.1115/1.3225775.
11 Lemaitre J.How to use damage mechanics[J].Nuclear Engineering and Desigin,1984,80(2):233?245.DOI:10.1016/0029-5493(84)90169-9.
12 Lemaitre J.Coupled elasto-plasticity and damage constitutive equations[J].Computer Methods in Applied Mechanics&Engineering,1985,51(1):31?49.DOI:10.1016/0045-7825(85)90026-X.
13余天庆,钱济成.损伤理论及应用[M].北京:国防工业大学出版社,1993.YU Tianqing,QIAN Jicheng.Damage theory and its appilication[M].Beijing:National Defense Industry Press,1993.
14王飞,郭万林.钛合金材料IMI834高温蠕变和蠕变断裂的连续损伤力学分析[J].机械强度,2005,27(4):530?533.DOI:10.3321/j.issn:1001-9669.2005.04.024.WANG Fei,GUO Wanlin.Continuum damage mechanics analysis of high temperature creep and creep fracture for titanium alloy IMI834[J].Journal of Mechanical Strength,2005,27(4):530?533.DOI:10.3321/j.issn:1001-9669.2005.04.024.
15蔡翔舟,戴志敏,徐洪杰.钍基熔盐堆核能系统[J].物理,2016,45(9):578?590.DOI:10.7693/wl20160904.CAI Xiangzhou,DAI Zhimin,XU Hongjie.Thorium molten salt reactor nuclear energy system[J].Physics,2016,45:578?590.DOI:10.7693/wl20160904.
16 Jing J P,Meng G,Sun Y,et al.An effective continuum damage mechanics model for creep-fatigue life assessment of a steam turbine rotor[J].International Jounal of Pressure Vessel and Piping,2003,80:389?396.DOI:10.1016/S0308-0161(03)00070-X.
17 ASME boiler and pressure vessel code,section II,part D,properties[S].New York:the American Society of Mechanical Engineers,2017.