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- Zhong, YanglongDepartment of Highway and Railway Engineering, School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China; Beijing Key Laboratory of Track Engineering, Beijing 100044, China (författare)
An Improved Cohesive Zone Model for Interface Mixed-Mode Fractures of Railway Slab Tracks
- Artikel/kapitelEngelska2021
Förlag, utgivningsår, omfång ...
- 2021-01-05
- MDPI,2021
- printrdacarrier
Nummerbeteckningar
- LIBRIS-ID:oai:DiVA.org:ltu-82335
- https://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-82335URI
- https://doi.org/10.3390/app11010456DOI
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- Språk:engelska
- Sammanfattning på:engelska
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Anmärkningar
- Validerad;2021;Nivå 2;2021-01-28 (johcin);Finansiär: Fundamental Research Funds for the Central Universities (2019JBM080), National Natural Science Foundation of China (51908031, U1734206), China Postdoctoral Science Foundation (2020M670126)
- The interface crack of a slab track is a fracture of mixed-mode that experiences a complex loading–unloading–reloading process. A reasonable simulation of the interaction between the layers of slab tracks is the key to studying the interface crack. However, the existing models of interface disease of slab track have problems, such as the stress oscillation of the crack tip and self-repairing, which do not simulate the mixed mode of interface cracks accurately. Aiming at these shortcomings, we propose an improved cohesive zone model combined with an unloading/reloading relationship based on the original Park–Paulino–Roesler (PPR) model in this paper. It is shown that the improved model guaranteed the consistency of the cohesive constitutive model and described the mixed-mode fracture better. This conclusion is based on the assessment of work-of-separation and the simulation of the mixed-mode bending test. Through the test of loading, unloading, and reloading, we observed that the improved unloading/reloading relationship effectively eliminated the issue of self-repairing and preserved all essential features. The proposed model provides a tool for the study of interface cracking mechanism of ballastless tracks and theoretical guidance for the monitoring, maintenance, and repair of layer defects, such as interfacial cracks and slab arches.
Ämnesord och genrebeteckningar
- TEKNIK OCH TEKNOLOGIER Samhällsbyggnadsteknik Annan samhällsbyggnadsteknik hsv//swe
- ENGINEERING AND TECHNOLOGY Civil Engineering Other Civil Engineering hsv//eng
- railway slab track
- interface mixed-mode fracture
- cohesive zone model
- unloading/reloading relationship
- Operation and Maintenance Engineering
- Drift och underhållsteknik
Biuppslag (personer, institutioner, konferenser, titlar ...)
- Gao, LiangDepartment of Highway and Railway Engineering, School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China; Beijing Key Laboratory of Track Engineering, Beijing 100044, China (författare)
- Cai, XiaopeiDepartment of Highway and Railway Engineering, School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China; Beijing Key Laboratory of Track Engineering, Beijing 100044, China (författare)
- An, BolunDepartment of Highway and Railway Engineering, School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China; Beijing Key Laboratory of Track Engineering, Beijing 100044, China (författare)
- Zhang, ZhihanDepartment of Highway and Railway Engineering, School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China; Beijing Key Laboratory of Track Engineering, Beijing 100044, China (författare)
- Lin, JanetLuleå tekniska universitet,Drift, underhåll och akustik(Swepub:ltu)linjan (författare)
- Qin, YingDepartment of Highway and Railway Engineering, School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China; Beijing Key Laboratory of Track Engineering, Beijing 100044, China (författare)
- Department of Highway and Railway Engineering, School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China; Beijing Key Laboratory of Track Engineering, Beijing 100044, ChinaDrift, underhåll och akustik (creator_code:org_t)
Sammanhörande titlar
- Ingår i:Applied Sciences: MDPI11:12076-3417
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