Abstract
Thailand has a railway system that is available throughout the country, so there are several railroad crossings. These crossings are generally made of concrete or logs with multiple constraints. There are some disadvantages of concrete railroad crossing, such as, crack, noise during car passing over. To overcome these disadvantages, the softer materials should be used instead. Therefore, this research proposes the natural rubber, widely grown throughout Thailand, panel railroad crossing. However, the natural rubber alone is not enough to withstand the harsh condition. Thus, it is necessary to have some addition ingredients that will enhance the natural rubber properties. The material used in this research is a rubber compound between Chloroprene Rubber (CR) 75% and Natural rubber (NR) 25% blend with additives such as carbon black (CB), magnesium oxide (MgO) and sulfur (S8). The objectives of this article were to analyze the deformation of the natural rubber panel railroad crossing and to evaluate its safety factor, defined as the ratio of strain at break and the maximum equivalent strain, using finite element method. In the analysis, the applied loading of the model was obtained from the State Railway of Thailand. The analyzed results reveal that the deflection of rubber panels passes the standard from State Railway of Thailand. Safety factor of external rubber panel is 27.03 and for internal rubber panels are 9.12 and 15.29. The metal pads had elastically deformed and concrete railroad sleeper deformation was very small.
Highlights
Thailand in one of the countries that has the highest production capacity of rubber in the world
Thailand focuses on the development of rubber processing industry in the country to increase the amount of rubber before selling, it will increase revenue for farmers
There are more than 2,500 railroad crossings across the country
Summary
Thailand in one of the countries that has the highest production capacity of rubber in the world. Thailand's rubber exports around 87% , export revenues are about 193,067 million Baht per year, but domestic processing about 13. Thailand focuses on the development of rubber processing industry in the country to increase the amount of rubber before selling, it will increase revenue for farmers. There are more than 2,500 railroad crossings across the country These crossings are made of concrete or logs. The disadvantages of using these materials are lifetime limit, cracking problem, damaged concrete cushions due to impact with crossing panels. There are promoting the use of rubber in Thailand, design and production of prototypes that are feasible to commercialize by Thai companies.
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