Design and Development of a Semi-Permanent Coupler of a Five-Coach Train

This study presents a locally designed and developed semi-permanent coupler for the DOST-MIRDC's train consisting of five 12-meter-length coaches. Using the Computer-Aided Design (CAD) software, the capability of the coupler for tension and compressive loads were considered. The calculation for the compression load of 1000 kN was required to pull the train in case of emergency towing. The CAD-modelled coupler was then simulated and analyzed using Solidworks software. The simulation was focused only on the collapsible elements for the compression load and the flange, rods, and nuts for the tension load. Using a 2000-kN Test of Metallic Products at MIRDC, the proof load test and breaking load test of 500 kN and 925.61 kN were respectively attained. The result of the tension load testing shows that the designed and fabricated semipermanent coupler is capable of withstanding load of 100 kN with a significant tolerance.