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首页> 外文期刊>Journal of thermal stresses >Influence of strength differential effect on material effort of a turbine guide vane based on thermoelastoplastic analysis
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Influence of strength differential effect on material effort of a turbine guide vane based on thermoelastoplastic analysis

机译：基于热弹塑性分析的强度差效应对涡轮导叶材料力的影响

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The strength differential (SD) effect has been observed in many iron-based metals such as 4310, 4330, maraging steel, and HY80 steels as well as titanium, aluminium 2024-T351, magnesium, and nickel-based super alloys such as aged Inconel 718. Moreover, the SD effect increases with temperature. The Huber-Mises-Hencky (HMH) J(2) yield condition is insucient to simulate the response of metals that exhibit the SD effect. Our work demonstrates the importance of taking into account the SD effect during strength analysis of turbine components. Two yield conditions are considered: the HMH condition and the SD-dependent Burzynski condition. The equivalent stresses produced by these conditions in the elastic state are compared. Plastic zone areas and effective strain values predicted by the two conditions are compared. Our investigation was performed based on thermal-fluid-structure interaction (FSI) analysis of a turbine guide vane made of a nickel-based super alloy that exhibits the SD effect. Conjugate heat transfer analysis was performed, and then elastoplastic stress analysis was performed with boundary conditions obtained from the computational fluid dynamics (CFD) analysis. The paraboloid Burzynski yield condition was implemented in an FE code. Implementation was based on the Euler backward method with consistency tangent moduli evaluated in the explicit form.
机译：在许多铁基金属（例如4310、4330，马氏体时效钢和HY80钢）以及钛，铝2024-T351，镁和镍基超级合金（例如时效Inconel）中观察到强度差（SD）效应718.此外，SD效应随温度增加。 Huber-Mises-Hencky（HMH）J（2）的屈服条件不足以模拟表现出SD效应的金属的响应。我们的工作证明了在涡轮部件强度分析过程中考虑SD效应的重要性。考虑了两个产量条件：HMH条件和依赖于SD的Burzynski条件。比较了这些条件在弹性状态下产生的等效应力。比较了这两个条件预测的塑性区面积和有效应变值。我们的研究是基于对显示出SD效应的镍基超级合金制成的涡轮导向叶片进行的热流结构相互作用（FSI）分析而进行的。进行共轭传热分析，然后使用从计算流体力学（CFD）分析获得的边界条件进行弹塑性应力分析。抛物面Burzynski屈服条件是通过FE代码实现的。实现是基于Euler向后方法，并以显式形式评估了一致性正切模量。

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