The formation of adiabatic shear bands as a result of cryogenic CNC machining of elastomers

V. G. Dhokia, S. T. Newman, P. Crabtree, M. P. Ansell

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Traditional polymer forming methods have concentrated on moulding technology. CNC Machining of a low-density material, such as an elastomer even at significantly reduced temperatures presents a number of challenges, with one being the generation of a machining phenomenon termed adiabatic shear band formation. As a result of this, tool degradation and increased part surface roughness can occur. The adiabatic shear band formation is a region on a chip where the ductile properties of the material being machined have been exceeded and the heat generated does not have sufficient time to dissipate. This leads in some cases to permanent material damage resulting in reduced fatigue resistance. With the machining of elastomers, the adiabatic shear formation has the potential to be even more evident, leading to rapid material degradation and poor surface finish characterisitics. In this paper,cyrogenic manufacturing is reviewed, ethylene vinyl acetate (EVA) and Neoprene materials are machined illustrating and the resulting adiabatic shear band formations are ilustrated.

Original languageEnglish
Title of host publicationProceedings of the 36th International MATADOR Conference
EditorsSrichand Hinduja, Lin Li
PublisherSpringer London
Pages235-238
Number of pages4
Volume2010-January
ISBN (Electronic)9781849964326
ISBN (Print)978-1-84996-431-9
DOIs
Publication statusPublished - 2010
Event36th International MATADOR Conference - Manchester, Lancashire, UK United Kingdom
Duration: 14 Jul 201016 Jul 2010

Conference

Conference36th International MATADOR Conference
CountryUK United Kingdom
CityManchester, Lancashire
Period14/07/1016/07/10

Keywords

  • Adiabatic Shear
  • CNC
  • Cryogenic Treatment
  • Chip Morphology
  • Chip Formation

ASJC Scopus subject areas

  • Control and Systems Engineering

Cite this

Dhokia, V. G., Newman, S. T., Crabtree, P., & Ansell, M. P. (2010). The formation of adiabatic shear bands as a result of cryogenic CNC machining of elastomers. In S. Hinduja, & L. Li (Eds.), Proceedings of the 36th International MATADOR Conference (Vol. 2010-January, pp. 235-238). Springer London. https://doi.org/10.1007/978-1-84996-432-6_54