Document Type

Undergraduate Project

Date of Degree Completion

Spring 2019

Degree Name

Bachelor of Science

Department

Mechanical Engineering Technology

Committee Chair

Craig Johnson

Second Committee Member

Dr. John Choi

Third Committee Member

Professor Charles Pringle

Abstract

A great deal of composite waste is generated in the construction of wings for the Boeing 777. These carbon fiber “wing trimmings” are currently being disposed of in a landfill. These carbon fiber boards are made of several layers laminated together, making them very rigid and hard to recycle. This report proposes a method to delaminate the layers of these composite wing trimmings using a hydraulic press and a V-shaped steel die so that they may be more easily shredded and thus recycled. A top, “male” die with two points is pressed into a bottom, “female” die with three points to bend the composite material and cause maximum delamination. Previous testing has revealed that a single three point bend in the material will produce delamination of less than 50%. This design will allow for the wing trimmings to be bent first in one direction, and then the other, a method that has been shown to provide much better delamination percentage in tests done on a hydraulic press. This tooling has been attached to a hydraulic press and integrated into a larger system built by other students in the Central Washington University MET department designed to feed the material through the delaminater and into a shredder. In testing delamination was greater than 50%. A recommendation for a future design would be to use a press brake instead of a hydraulic press to increase the rate of material processing.

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