Date of Award

Fall 2021

Publication Type

Dissertation

Degree Name

Ph.D.

Department

Mechanical, Automotive, and Materials Engineering

First Advisor

W. Altenhof

Second Advisor

H. Hu

Third Advisor

A. Alpas

Keywords

Aluminum, Axial crushing, Axial cutting, Energy absorption, Impact testing, Magnesium

Rights

info:eu-repo/semantics/openAccess

Abstract

The primary objective of this research was to investigate cutting deformation modes, employing higher-bladed cutters (i.e. 6 or more evenly space blades), with an emphasis on superior energy absorbing capabilities in comparison to axial crushing, the current state-of-the-art. A series of test cases involving AA6061 extrusions were identified utilizing analytical models of the steady-state cutting force and mean crushing force and selecting geometries where the ratio of the former force normalized with respect to the latter exceeded unity. Quasi-static testing confirmed that the total energy absorbing capacity could be exceeded while simultaneously reducing the peak force under quasi-static loading for 8 and 10-bladed cutting modes.

The superior energy absorbing capacity was attributed to the onset of a hybrid

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