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A Loading Device for Fracture Testing of Compact Tension Specimen in the SEM

Rödel, Jürgen and Kelly, J. F. and Stoudt, M. R. and Bennison, S. J. (1991):
A Loading Device for Fracture Testing of Compact Tension Specimen in the SEM.
In: SCANNING MICROSCOPY, SCANNING MICROSCOPY INT, PO BOX 66507, AMF O'HARE, CHICAGO, IL 60666, pp. 29-35, 5, (1), ISSN 0891-7035, [Article]

Abstract

A loading device for performing fracture experiments on compact tension specimens in the SEM has been designed. Its key elements are a piezoelectric translator for applying controlled displacements to the loading points on the specimen and a load cell to measure applied loads. The effective transmission of displacement from the piezoelectric driver to the specimen was found to be the major mechanical design problem. The peripheral equipment includes a function generator and a high voltage amplifier that drives the piezoelectric translator as well as a video overlay and standard video equipment to record the image continuosuly during the course of the experiment. A case study on alumina describes qualitative observations on the toughening mechanism, crack-interface bridging, operating in this material. Quantitative information pertaining to the closure stresses associated with this toughening mode can be obtained by measuring the crack profile.

Item Type: Article
Erschienen: 1991
Creators: Rödel, Jürgen and Kelly, J. F. and Stoudt, M. R. and Bennison, S. J.
Title: A Loading Device for Fracture Testing of Compact Tension Specimen in the SEM
Language: English
Abstract:

A loading device for performing fracture experiments on compact tension specimens in the SEM has been designed. Its key elements are a piezoelectric translator for applying controlled displacements to the loading points on the specimen and a load cell to measure applied loads. The effective transmission of displacement from the piezoelectric driver to the specimen was found to be the major mechanical design problem. The peripheral equipment includes a function generator and a high voltage amplifier that drives the piezoelectric translator as well as a video overlay and standard video equipment to record the image continuosuly during the course of the experiment. A case study on alumina describes qualitative observations on the toughening mechanism, crack-interface bridging, operating in this material. Quantitative information pertaining to the closure stresses associated with this toughening mode can be obtained by measuring the crack profile.

Journal or Publication Title: SCANNING MICROSCOPY
Volume: 5
Number: 1
Publisher: SCANNING MICROSCOPY INT, PO BOX 66507, AMF O'HARE, CHICAGO, IL 60666
Uncontrolled Keywords: BRITTLE MATERIALS; CRACK-RESISTANCE; CERAMICS; ALUMINA
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 13 Jun 2012 12:26
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