Experimental and numerical analyses of stiffness and fatigue properties of a spring element for mounts with tunable stiffness made of C85S+QT sheet steel.

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Bibliographic Details
Title:	Experimental and numerical analyses of stiffness and fatigue properties of a spring element for mounts with tunable stiffness made of C85S+QT sheet steel.
Authors:	Landersheim, Volker¹ volker.landersheim@lbf.fraunhofer.de, Mathieu, Cedric¹ cedric.mathieu@lbf.fraunhofer.de, Hansmann, Jan¹ jan.hansmann@lbf.fraunhofer.de, Kaal, William¹ william.kaal@lbf.fraunhofer.de
Source:	Fracture & Structural Integrity. Jan2026, Issue 75, p297-314. 18p.
Subjects:	Stiffness (Mechanics), Material fatigue, Motor vehicle dynamics, Mechanical behavior of materials, Fatigue testing machines, Structural steel
Abstract:	The article focuses on the experimental and numerical analysis of the stiffness and fatigue properties of a tunable spring element made from C85S+ QT sheet steel, designed for mounts with adjustable stiffness. The study highlights the importance of tunable mounts in various applications, such as vehicle dynamics and robotic processes, and presents a mechanism developed by the Fraunhofer Institute for Structural Durability and System Reliability that allows for efficient stiffness tuning. The research includes detailed methods for testing the fatigue strength of the spring elements, results from fatigue tests, and the development of analytical approximations for estimating stiffness and fatigue strength based on geometric parameters. The findings indicate that the fatigue life of the mounts is significantly influenced by the sheet thickness and slider angle, with most failures occurring at the notch between the spring arm and the inner ring. [Extracted from the article]
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Database:	Engineering Source

Description
Abstract:	The article focuses on the experimental and numerical analysis of the stiffness and fatigue properties of a tunable spring element made from C85S+ QT sheet steel, designed for mounts with adjustable stiffness. The study highlights the importance of tunable mounts in various applications, such as vehicle dynamics and robotic processes, and presents a mechanism developed by the Fraunhofer Institute for Structural Durability and System Reliability that allows for efficient stiffness tuning. The research includes detailed methods for testing the fatigue strength of the spring elements, results from fatigue tests, and the development of analytical approximations for estimating stiffness and fatigue strength based on geometric parameters. The findings indicate that the fatigue life of the mounts is significantly influenced by the sheet thickness and slider angle, with most failures occurring at the notch between the spring arm and the inner ring. [Extracted from the article]
ISSN:	19718993
DOI:	10.3221/IGF-ESIS.75.21