25 years field test history and fatigue damage analysis for a scrapped ladle crane

IF 4.4 2区工程技术 Q1 ENGINEERING, MECHANICAL

Engineering Failure Analysis Pub Date : 2024-11-05 DOI:10.1016/j.engfailanal.2024.109043

Guoqian Wei , Huan Xu , You Zhao , Zhang Dang , Zhiwen Lu

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Abstract

Fatigue performances of ladle cranes will gradually decrease with the increase of service years. The service history and the fatigue damage of a scrapped ladle crane were investigated and analyzed in this paper. The test history of the ladle crane was collected and concluded, and the statistical parameters of lifting capacity and the crack condition during service were determined. The last comprehensive field test before scrapping the ladle crane was introduced in detail and the damage evolution was analyzed. The geometry measurement showed that the main girders’ stiffness had changed obviously. The stress test of the crack-prone positions of the metal structure revealed their remaining bearing capacity and the damage evolution characteristics. Further analysis proved that the static stiffness of the main girder has a closer relationship with damage deterioration. Some material property inspections were carried out for samples cut from the scrapped crane’s main girder, which were of the load-carrying part and the non-load-carrying part respectively. Results showed that the elastic modulus and hardness of the materials decreased evidently after service, while other mechanical properties did not change significantly. This study will provide useful references for further understanding of the fatigue characteristics and evolution behaviors of ladle cranes.

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一台报废钢包起重机 25 年的现场测试历史和疲劳损伤分析

钢包起重机的疲劳性能会随着使用年限的增加而逐渐降低。本文对一台报废钢包起重机的服役历史和疲劳损伤进行了调查和分析。收集并总结了钢包起重机的测试历史，确定了起重能力统计参数和服役期间的裂纹状况。详细介绍了钢包起重机报废前的最后一次综合现场试验，并分析了损伤演变情况。几何测量结果表明，主梁刚度发生了明显变化。对金属结构易开裂位置的应力测试显示了其剩余承载能力和损坏演变特征。进一步分析表明，主梁的静态刚度与损伤恶化的关系更为密切。对从报废起重机主梁上切割下来的承载部分和非承载部分样品进行了材料性能检测。结果表明，材料的弹性模量和硬度在服役后明显下降，而其他机械性能变化不大。这项研究将为进一步了解钢包起重机的疲劳特性和演变行为提供有益的参考。

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

Engineering Failure Analysis 工程技术-材料科学：表征与测试

CiteScore

7.70

自引率

20.00%

发文量

956

审稿时长

47 days

期刊介绍： Engineering Failure Analysis publishes research papers describing the analysis of engineering failures and related studies. Papers relating to the structure, properties and behaviour of engineering materials are encouraged, particularly those which also involve the detailed application of materials parameters to problems in engineering structures, components and design. In addition to the area of materials engineering, the interacting fields of mechanical, manufacturing, aeronautical, civil, chemical, corrosion and design engineering are considered relevant. Activity should be directed at analysing engineering failures and carrying out research to help reduce the incidences of failures and to extend the operating horizons of engineering materials. Emphasis is placed on the mechanical properties of materials and their behaviour when influenced by structure, process and environment. Metallic, polymeric, ceramic and natural materials are all included and the application of these materials to real engineering situations should be emphasised. The use of a case-study based approach is also encouraged. Engineering Failure Analysis provides essential reference material and critical feedback into the design process thereby contributing to the prevention of engineering failures in the future. All submissions will be subject to peer review from leading experts in the field.