TITLE:
Mechanical Properties for Reliability Analysis of Structures in Glassy Carbon
AUTHORS:
Cédric Garion
KEYWORDS:
Glassy Carbon; Weibull; Strength; Toughness; Structure
JOURNAL NAME:
World Journal of Mechanics,
Vol.4 No.3,
March
26,
2014
ABSTRACT: Despite
its good physical properties, the glassy carbon material is not widely used,
especially for structural applications. Nevertheless, its transparency to
particles and temperature resistance are interesting properties for the
applications to vacuum chambers and components in high energy physics. For example,
it has been proposed for fast shutter valve in particle accelerator [1]
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[2]
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. The mechanical properties have to be carefully determined to assess the
reliability of structures in such a material. In this paper, mechanical tests
have been carried out to determine the elastic parameters, the strength and
toughness on commercial grades. A statistical approach, based on the Weibull’s
distribution, is used to characterize the material both in tension and
compression. The results are compared to the literature and the difference of
properties for these two loading cases is shown. Based on a Finite Element
analysis, a statistical approach is applied to define the reliability of a
structural component in glassy carbon. In this paper, the determination of the
mechanical properties of glassy carbon allows the analysis of reliability of
structures in glassy carbon.