Numerical Simulation Of Huck Series Fastener Mechanics Action In Heavy Load Wagon

To raise the railway transportation ability of our country, wagon is developing to the direction of "heavy load". Along with the increase of loading capacity, the steel aluminum mix structural wagon emerges as the times require, which adopt aluminum profile to reduce self weight. As the increase of loading capacity, the load that borne between each parts of wagon is also increased, it make higher requirement to the joint of each parts in wagon.In modern industrial production, plate joins method usually adopting riveting, thread and spot welding etc. But these joined methods can not satisfy the requirement of the heavy load wagon because of the shortcoming and self limit, therefore needs adopt the new way of joining.The fasteners of Huck company uses material plastic reform to joint plate tightly can satisfy the requirement of the heavy load wagon, which have gotten plenty of applications. However, the designers don't know the size and range of remaining stress, they don't know the range of pressure either, so it is hardly to ascertain the distribution and quantity of Huck series fastener. They have to use more fasteners to make sure the safety of joint, causes unnecessary waste. Otherwise the allowable stress of plate is certain, the plates in wagon not only get the outside stress, but also get the remaining stress of Huck series fasteners. The sum of outside stress and remaining stress must less than the allowable stress when plates are used. Uncertainty of the size of the remaining stress in plate will influence the design of wagon reliability.To solve above problem, Based on nonlinear FE software MARC, numerical simulation of Huck series fastener mechanics action in heavy load wagon has been studied. The paper discussed the key technology in building the finiteelement model. The elastoplastic model has been built based on contact principle. The result of numerical simulation revealed the tendency of Huck series fastener during installation. It not only provide numerical evidence for ascertaining the pressure influence range of Huck series fastener, but also provide an important reference for the use of Huck series fastener in heavy load wagon.