The article presents the results of laboratory tests and analytical calculations of components of rigid rail fastening to K-type railway sleepers, namely alloy bolts and nuts. The results of chemical composition and microstructure analysis of the bolt material, mechanical properties, stress state analysis of the fasteners, and metallographic examinations performed on the fractures and cross-sections of damaged bolts and nuts are provided. A hypothesis regarding the cause and mechanism of alloy bolt failure during assembly and disassembly is proposed.FAILURE MECHANISM OF BOLT ALLOY ATTACHING RAILS TO SLEEPERS TYPE K
The article presents laboratory test results and analytical calculations of components of rigid attachment of rails to sleepers type K, it is alloy bolts and nuts. The article contains the research results of chemical composition and microstructure of the bolts material, mechanical properties, analysis of stress in fasteners elements and metallurgy research made on breakthroughs and cross-sections damaged bolts and nuts. The hypothesis concerning the causes and mechanism of breaking the bolt alloy during assembly and disassembly
1. INTRODUCTION Alloy bolts and nuts are components of the rigid rail fastening system for K-type sleepers, commonly used by Polish railways. (…)
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Source: Logistyka Magazine
Failure mechanism of alloy bolts for rail fastening to K-type sleepers – PDF file for download