Cancade Pup Trailer Chassis Redesign

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Date
2018-12-05
Authors
Peters, Cody
Gruenke, Christian
Domingo, Patrick
Yon Wu, Dennis
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Cancade CBI Limited is a truck trailer manufacturer that is currently experiencing issues in their manufacturing process for pup trailers. The current procedure for manufacturing the pup trailer chassis involves a process that requires multiple people and cranes to lift and flip the30 foot long assembly in order to weld all the appropriate areas. This process is both dangerous and time consuming. Cancade has requested that a new neck portion of the trailer be designed so that the manufacturing and assembly process becomes quicker and safer. A project definition was created and included to provide background information on the project as well as to identify the client’s needs and methods for evaluating those needs. The team then collaborated on concept generation to come up with ideas for possible concepts. The concept creation process was followed by an iteration of screening and scoring processes that resulted in the final concept, the Fork C-channel design made of low carbon steel. The team then started on the details of the design. The first step, and a requirement for the deliverables, was to analyze the current design using Finite Element Analysis. This was done to determine the maximum load that the current design would fail at. This maximum load would be the benchmark to test the new design against, assuring that the new design would be as strong as the current design. An analytical comparison was performed to compare welding strength to HuckBolt strength, resulting in 9.45 inches of weld equal to the clamping force of one HuckBolt. During this time, joints for the tube to C-channel connection and neck to frame connection were designed with the dimensions of the C-channel and tube approximated based on research and what Cancade currently uses for manufacturing. The benchmark loads were then applied to the new design and weak points were identified at the box to C-channel joint. Several iterations of joints and joint reinforcements were designed and analyzed until the joint was strong enough to resist yielding. The design was then subjected to known loads, leading to results that showed the C-channel and box met the...

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