Uniaxial tensile strain measurement for ceramic testing at elevated temperatures: Requirements, problems, and solutions

Liu, K.C.; Pih, H.; Voorhes, David W.

doi:10.1016/0267-3762(88)90043-4

Cited by 9 publications

(3 citation statements)

References 3 publications

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“…0 At the present time, much of the difficulty associated with conducting these type of tests has been overcome, and various methods for gripping and testing have been demonstrated. (8)(9)(10)(11)(12)(13) Grips for holding cylindrical button-head specimens are commercially available from several vendors; (11) however, specimen costs are still high in comparison to a flexural specimen. An example of a self aligning grip coupling system that can be used on round or flat specimens is shown in Figure 3.…”

Section: Flexural Strengthmentioning

confidence: 99%

“…Various components used for conducting tensile tests on round buttonhead specimens are shown in this figure. (9) Grip systems for applying loads to flat specimens via pin loading and universal joints have similarly been developed. (10) Specimen design is also of concern since in brittle materials localized stress concentrations cause failure to be preferentially located in these regions giving non-representative values for the uniaxial strength.…”

Section: Flexural Strengthmentioning

confidence: 99%

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Development of ASTM Standards in Support of Advanced Ceramics Development: A Status Report

1993

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The ASTM Committee C-28 on Advanced Ceramics was organized in 1986 when it became apparent that ceramics were being considered for extensive use in such applications as heat engines in the automotive and aerospace industries. It was determined that these standards should be written for the production, inspection, testing, data analysis, and probabilistic design for utilization of advanced ceramics (where advanced ceramics include both monolithic and composite materials). The ASTM Committee C-28 is organized into five subcommittees as follows: Properties and Performance, Design and Evaluation, Characterization and Processing, Ceramic Composites, and Nomenclature. A summary overview is given of work performed to date (1992) and ongoing efforts in developing standards by these various subcommittees.

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Section: Flexural Strengthmentioning

confidence: 99%

Section: Flexural Strengthmentioning

confidence: 99%

Development of ASTM Standards in Support of Advanced Ceramics Development: A Status Report

1993

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“…In the case of uniaxial tensile creep, there are a variety of testing methods that differ in terms of the design of the specimen geometry, fixturing, gripping, and the displacement measurement method (see, for example, Refs. [ 8 – 14 ]). All techniques have their advantages and shortcomings.…”

Section: Introductionmentioning

confidence: 99%

Optimum design of a ceramic tensile creep specimen using a finite element method

Wang

Chiang

Chuang

1997

J. Res. Natl. Inst. Stand. Technol.

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An optimization procedure for designing a ceramic tensile creep specimen to minimize stress concentration is carried out using a finite element method. The effect of pin loading and the specimen geometry are considered in the stress distribution calculations. A growing contact zone between the pin and the specimen has been incorporated into the problem solution scheme as the load is increased to its full value. The optimization procedures are performed for the specimen, and all design variables including pinhole location and pinhole diameter, head width, neck radius, and gauge length are determined based on a set of constraints imposed on the problem. In addition, for the purpose of assessing the possibility of delayed failure outside the gage section, power-law creep in the tensile specimen is considered in the analysis. Using a particular grade of advanced ceramics as an example, it is found that if the specimen is not designed properly, significant creep deformation and stress redistribution may occur in the head of the specimen resulting in undesirable (delayed) head failure of the specimen during the creep test.

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Mechanical testing machine criteria

McEnteggart¹,

Lohr²

1995

Materials Metrology and Standards for Structural Performance

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Uniaxial tensile strain measurement for ceramic testing at elevated temperatures: Requirements, problems, and solutions

Cited by 9 publications

References 3 publications

Development of ASTM Standards in Support of Advanced Ceramics Development: A Status Report

Development of ASTM Standards in Support of Advanced Ceramics Development: A Status Report

Optimum design of a ceramic tensile creep specimen using a finite element method

Mechanical testing machine criteria

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