Creep damage and fracture of turbine blade roots

IF 2.5 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications Pub Date : 2024-08-07 DOI:10.1177/14644207241269616

Dmytro Breslavsky, Volodymyr Mietielov, Alyona Senko, Oksana Tatarinova, Ihor Palkov, Holm Altenbach

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引用次数: 0

Abstract

An approach to modeling creep fracture under a complex stress state using the Finite Element Method is proposed. The model of the turbine blade root was studied. The methodology of the transition in the analysis from the general 3D to the 2D stress state is proposed. For the models of the roots, the characteristics of the damage accumulation were obtained and the analysis of subsequent fracture in roots made of different materials was performed.The novel results of the description the creep fracture behavior after the period of damage accumulation were obtained. Based on the analysis of the numerical results, it was established that for different materials qualitatively different fracture processes occur in different places of the blade root. They were as follows: the fracture with separation of the main part of the root between the lower teeth; destruction of a separate tooth with a transition inside the root, as well as of a separate tooth jointly with the root’s lower part. A novel approach to obtaining the form of an equation for description the current length of a creep crack by use of numerical results is proposed.

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涡轮叶片根部的蠕变损伤和断裂

本文提出了一种利用有限元法对复杂应力状态下的蠕变断裂进行建模的方法。研究了涡轮叶片根部的模型。提出了从一般三维应力状态向二维应力状态过渡的分析方法。对于根部模型，获得了损伤累积的特征，并对不同材料制成的根部进行了后续断裂分析。根据对数值结果的分析，可以确定不同材料在叶片根部的不同位置发生了质的不同断裂过程。具体如下：断裂时，下齿之间的齿根主体部分分离；齿根内部过渡的独立齿以及与齿根下部相连的独立齿的破坏。本文提出了一种新方法，即利用数值结果获得描述蠕变裂纹当前长度的方程形式。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 工程技术-材料科学：综合

CiteScore

4.70

自引率

8.30%

发文量

166

审稿时长

3 months

期刊介绍： The Journal of Materials: Design and Applications covers the usage and design of materials for application in an engineering context. The materials covered include metals, ceramics, and composites, as well as engineering polymers. "The Journal of Materials Design and Applications is dedicated to publishing papers of the highest quality, in a timely fashion, covering a variety of important areas in materials technology. The Journal''s publishers have a wealth of publishing expertise and ensure that authors are given exemplary service. Every attention is given to publishing the papers as quickly as possible. The Journal has an excellent international reputation, with a corresponding international Editorial Board from a large number of different materials areas and disciplines advising the Editor." Professor Bill Banks - University of Strathclyde, UK This journal is a member of the Committee on Publication Ethics (COPE).