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首页> 外文会议>European Automotive Congress >LIGHTWEIGHT CONSTRUCTION AND IMPROVEMENT OF FATIGUE LIFETIME OF LEAF SPRING SUSPENSION SYSTEMS BY MEANS OF INNOVATING SURFACE TREATMENT TECHNOLOGIES
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LIGHTWEIGHT CONSTRUCTION AND IMPROVEMENT OF FATIGUE LIFETIME OF LEAF SPRING SUSPENSION SYSTEMS BY MEANS OF INNOVATING SURFACE TREATMENT TECHNOLOGIES

机译：通过创新的表面处理技术，轻量级构造与叶片弹簧悬架系统疲劳寿命的改进

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摘要

An improved technological process for surface treatment of leaf springs for the suspension of vehicle axles is presented which can significantly favor the residual stress state and thus improve their resistance to cyclic loading. The basic issue of the improved technological process is the thermomechanical treatment of the leaf spring surface consisting of stress-speening under defined elevated temperature. The paper discusses the manufacturing process emphasising the microstructural aspects and macroscopical residual stress-strain state in the region close to the surface. Draft solutions are elaborated and optimised with regard to the strength behaviour both by finite element analysis and experimentally. Approval of durability under operational loading is brought experimentally, prototype springs thereby being exposed on the test rig to standardised load spectra resulting from vertical loading and braking. The comparison of test results obtained from conventionally and thermomechanically treated leaf springs demonstrates the increase of fatigue life.
机译：提出了一种改进的用于车轴悬架的叶片弹簧的表面处理的技术方法，其可以显着地利用残留应力状态，从而提高它们对循环载荷的抵抗力。改进的技术过程的基本问题是由限定的温度下的应力制动组成的叶子弹簧表面的热机械处理。本文讨论了在靠近表面的区域中强调微观结构方面和宏观残余应力 - 应变状态的制造过程。通过有限元分析和实验，在强度行为方面阐述并优化了解决方案的草案。通过实验促进运行负载下耐用性的批准，原型弹簧从而暴露在试验台上以垂直装载和制动产生的标准化负载光谱。从常规和热机理的叶子弹簧获得的测试结果的比较显示出疲劳寿命的增加。

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