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Numerical analysis of fatigue behaviors for tungsten armor of ITER divertor
Nuclear Materials and Energy ( IF 2.6 ) Pub Date : 2020-10-24 , DOI: 10.1016/j.nme.2020.100815
Shuming Wang , Ye Wang , Qingzhi Yan , Changchun Ge

Thermal responses and fatigue behaviors of the tungsten armor of monoblock divertor under steady-state and transient high heat flux (HHF) loads as well as the coupling of the two were simulated and analyzed by the finite element method. It was found that, under the action of thermal cycle loads, the earliest fatigue failure area of tungsten armor is on the surface, and with the increasing of HHF load, the damage area of the armor extends also, while the transient load only causes damage on surface of the armor. The fatigue lifetime of tungsten armor decreases rapidly with the increase of load, whether under steady-state load or transient load. Different transient load under the same steady-state load is researched. When two loads are coupled, the fatigue life is shorter as the load value is high, while the fatigue lifetime is basically unchanged when the transient load is the same under different steady-state loads, that is to say, the steady-state load has little influence on the results, and the transient load during ELMs is the leading factor for the fatigue lifetime.



中文翻译:

ITER分流器钨铠装疲劳行为的数值分析

通过有限元方法模拟和分析了整体式分流器的钨铠装在稳态和瞬态高热通量(HHF)载荷下的热响应和疲劳行为,以及两者的耦合。研究发现,在热循环载荷作用下,钨铠装最早的疲劳破坏区域在表面,并且随着HHF载荷的增加,铠装的破坏面积也扩大,而瞬态载荷仅造成破坏。在装甲的表面上。无论是稳态负载还是瞬态负载,钨铠装的疲劳寿命都会随着负载的增加而迅速降低。研究了相同稳态载荷下的不同瞬态载荷。当两个负载耦合时,负载值越高,疲劳寿命越短,

更新日期:2020-11-12
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