{"title":"Fatigue characterisation of structural steel by means of the small punch test: Development of a methodology","authors":"S. Otero, G. Álvarez, M.M. Llera, C. Rodríguez","doi":"10.1016/j.tafmec.2024.104772","DOIUrl":null,"url":null,"abstract":"<div><div>Knowledge of the fatigue behaviour of materials is fundamental to the safe design of structures. Standardised tests are used for this purpose, but their application requires a considerable amount of material, which in many cases is not available. To overcome this problem, the use of miniature tests would be the optimal solution. This work analyses the application of the Small Punch Test (SPT) to characterise the fatigue behaviour of structural steels. To this end, an experimental methodology has been developed to analyse not only where SPT-fatigue damage initiates and how it propagates, but also its relationship with changes in specimen compliance. Based on this methodology, different S<sub>PT</sub>-N <em>iso</em>-damage curves and the SPT-fatigue limit have been obtained for two structural steels. By comparing these results with those obtained from rotating beam fatigue tests, a simple correlation has been proposed between the fatigue limits obtained from SPT and rotating beam fatigue tests.</div></div>","PeriodicalId":22879,"journal":{"name":"Theoretical and Applied Fracture Mechanics","volume":"135 ","pages":"Article 104772"},"PeriodicalIF":5.0000,"publicationDate":"2024-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Theoretical and Applied Fracture Mechanics","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0167844224005226","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Knowledge of the fatigue behaviour of materials is fundamental to the safe design of structures. Standardised tests are used for this purpose, but their application requires a considerable amount of material, which in many cases is not available. To overcome this problem, the use of miniature tests would be the optimal solution. This work analyses the application of the Small Punch Test (SPT) to characterise the fatigue behaviour of structural steels. To this end, an experimental methodology has been developed to analyse not only where SPT-fatigue damage initiates and how it propagates, but also its relationship with changes in specimen compliance. Based on this methodology, different SPT-N iso-damage curves and the SPT-fatigue limit have been obtained for two structural steels. By comparing these results with those obtained from rotating beam fatigue tests, a simple correlation has been proposed between the fatigue limits obtained from SPT and rotating beam fatigue tests.
期刊介绍：
Theoretical and Applied Fracture Mechanics'' aims & scopes have been re-designed to cover both the theoretical, applied, and numerical aspects associated with those cracking related phenomena taking place, at a micro-, meso-, and macroscopic level, in materials/components/structures of any kind.
The journal aims to cover the cracking/mechanical behaviour of materials/components/structures in those situations involving both time-independent and time-dependent system of external forces/moments (such as, for instance, quasi-static, impulsive, impact, blasting, creep, contact, and fatigue loading). Since, under the above circumstances, the mechanical behaviour of cracked materials/components/structures is also affected by the environmental conditions, the journal would consider also those theoretical/experimental research works investigating the effect of external variables such as, for instance, the effect of corrosive environments as well as of high/low-temperature.
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