A new approach for the analytical hcf strength assessment of components from nickel-base alloys | Zendy

Milan Peschkes | Zendy; Jochen Höhbusch | Zendy; Henning Haensel | Zendy; Jan Scholten | Zendy

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A new approach for the analytical hcf strength assessment of components from nickel-base alloys

Author(s) -

Milan Peschkes,

Jochen Höhbusch,

Henning Haensel,

Jan Scholten

Publication year - 2016

Publication title -

procedia structural integrity

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.285

H-Index - 18

ISSN - 2452-3216

DOI - 10.1016/j.prostr.2016.06.399

Subject(s) - finite element method , workflow , usability , fatigue limit , structural engineering , stress (linguistics) , materials science , component (thermodynamics) , process (computing) , guideline , material selection , sensitivity (control systems) , strength of materials , reliability engineering , computer science , mechanical engineering , engineering , composite material , medicine , linguistics , philosophy , physics , pathology , human–computer interaction , database , electronic engineering , thermodynamics , operating system

Based on the requirement of common guidelines for the assessment of the fatigue strength of structural components, this paper presents an approach to create an assessment workflow for components made of nickel-base alloys, based on the basic workflow of an existing guideline. Material-related parameters of the guideline that are considered to require adjustment when used for nickel-base alloys are modified, covering recent publications and available material studies. Besides the analytical determination of the materials fatigue strength, the approach especially deals with the influence of mean stress and notch sensitivity. The new approach is verified using component-like specimens which are designed based on typical pump-components. Staircase tests are performed to retrieve the specimen’s high cycle fatigue strength experimentally. A finite element model of the specimen including the test environment provides realistic local stress values for the computational process. The evaluated attempts to calculate the main influences are compared to the test results. Further selection is made regarding the usability of the presented approach

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