Novel Bending Test Method for Polymer Railway Sleeper Materials
نویسندگان
چکیده
Alternative sleeper technologies have been developed to address the significant need for replacement of deteriorating timber railway sleepers. The review literature indicates that sleepers might fail while in service, despite passing evaluation tests current composite standards which indicated these do not represent situ on ballast. In this research, a new five-point bending test is evaluate flexural behaviour supported by Due simplicity, acceptance level accuracy and lack in-service alternative sleepers, testing method justified with according Beam Elastic Foundation theory. Three technologies—plastic, synthetic composites low-profile prestressed concrete addition sleepers—were tested under service loading condition suitability method. To differences due their different modulus elasticities, most appropriate material middle support was also determined. Analytical equations moments without settlement were developed. results showed static could induce positive negative experienced train wheel load. It found proposed spans, steel-EPDM rubber suitable configuration low such as plastic, steel-neoprene medium polymer steel-steel very high concrete. Finally, moment can precisely predict test.
منابع مشابه
Static and Dynamic Analysis of Railway Track Sleeper
The increased speed and weight of modern trains puts the components of a railway track in a highly dynamic load situation. Irregularities of the wheels and rails induce substantial dynamic loads that have to be accounted for in the procedure of designing the railway track. The concrete sleeper is an essential part of the track structure and there is a growing demand for improved analytical tool...
متن کاملA New Technique for Quality Assessment of Railway Ballast Materials
The influence of main quality tests on the overall quality of railway ballast materials is assessed in this study. The need to integrate all acceptance tests in a unified manner for precise evaluation of ballast quality is identified, and a technique of performing this is proposed. Using this approach, a new ballast quality index (BQI) is defined in which, the main acceptance tests including ab...
متن کاملA novel method for laser forming of two-step bending of a dome shaped part
In recent decades, one of the challenges in sheet metal forming was production of two-step bending surfaces without mechanical tools and external force or by a combination of heat source and mechanical tools. Forming with a heat source such as laser beam has the potential for forming arbitrary 3D shapes such as two-step bending surfaces. In this paper a novel method for laser forming of complic...
متن کاملEvaluating the Semi-Circular Bending Test for HMA Mixtures
Semi-Circular Bending (SCB) Test is a fast and accurate three-point bending test, which was originally used in rock mechanics. SCB test is going to be an accepted test method for asphalt concrete pavements. Different asphalt-mixture property-values such as tensile strength, stress intensity factor and fatigue can be obtained by this test. In this study, static and dynamic tests including SCB te...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Polymers
سال: 2021
ISSN: ['2073-4360']
DOI: https://doi.org/10.3390/polym13091359