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New Advanced Ceramics Standards from ASTM Cover Fracture Mirror Size Analysis, Tensile Strength DataSubcommittee C28.01 on Mechanical Properties and Performance, part of ASTM International Committee C28 on Advanced Ceramics, has recently approved two new standards, ASTM C1678 , Practice for Fractographic Analysis of Fracture Mirror Sizes in Ceramics and Glasses, and ASTM C1683 , Practice for Size Scaling of Tensile Strengths Using Weibull Statistics for Advanced Ceramics., ASTM C1678 —Bringing Consistency to Fracture Mirror Size Analysis, Fracture mirror size analysis is a powerful quantitative tool for the interpretation of broken ceramic and glass articles. While this type of analysis can be used to determine the stress in a part at the instant of fracture, inspection and interpretation procedures have often varied, resulting in uncertainty in stress estimates. ASTM C1678, Practice for Fractographic Analysis of Fracture Mirror…, ASTM C1683 —Scaling Strength Values, ASTM C1683, Practice for Size Scaling of Tensile Strength Using Weibull Statistics for Advanced Ceramics, provides methodology to convert fracture strength parameters estimated from data obtained with one test geometry to strength parameters representing other test geometries. Stephen Duffy, chair of civil engineering, Cleveland State University, and C28 member, says that companies producing…
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All interested parties are invited to attend a Sandwich Construction Workshop on Wednesday, March 12, at 4:30 p.m., in Melbourne, Fla. The workshop is being held by Subcommittee D30.09 on Sandwich Construction, part of ASTM International Committee D30 on Composite Materials. Committee D30 is meeting in conjunction with Marine Applications of Composite Materials from March 12-14 at the Crowne…
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Ceramic and glass companies, as well as universities and government laboratories, will be the primary users of a new ASTM standard that allows for the flexural strength determination of components made in a round shape or after finish machining with minimal waste. The standard, ASTM C1684 , Test Method for Flexural Strength of Advanced Ceramics at Ambient Temperature-Cylindrical Rod Strength, was…
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A new ASTM International standard will enable composite end users and materials suppliers within the aerospace industry to perform an important test for polymer matrix composites within guidelines set by the U.S. Federal Aviation Administration. The standard, D7028 , Test Method for Glass Transition Temperature (DMA Tg) of Polymer Matrix Composites by Dynamic Mechanical Analysis (DMA), is under…
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ASTM International Committee C28 on Advanced Ceramics and the American Ceramic Society are co-sponsoring a workshop, Needs and Opportunities for Strength and Fracture Standards at Micro and Nano Scales, on Jan. 27, 2008, from 1:00 to 5:00 p.m. at the Hilton Daytona Beach Resort in Daytona Beach, Fla. The workshop will be held in conjunction with the ASTM Committee C28 meetings to be held Jan. 26-…
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Subcommittee D30.05 on Structural Test Methods, part of ASTM International Committee D30 on Composite Materials, has been standardizing a series of methods that are related to the analysis and substantiation of mechanically fastened joints composed of composite materials. The latest in this series of standards, D 7332/D 7332M , Test Method for Measuring the Fastener Pull-Through Resistance of a…
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ASTM International Committee D30 on Composite Materials invites all interested parties to participate in a new task group on fiber-reinforced polymers. The task group is under the jurisdiction of Subcommittee D30.05 on Structural Test Methods. The purpose of the new task group is to review a series of tests that the American Concrete Institute has developed through their Committee 440 on Fiber-…
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A questionnaire sent to members of ASTM International Committee D30 on Composite Materials proved to be the catalyst for a pair of newly approved standards, D 7136, Test Method Measuring the Damage Resistance of a Fiber-Reinforced Polymer Matrix Composite to a Drop-Weight Impact Event, and D 7137, Test Method for Compressive Residual Strength Properties of Damaged Polymer Matrix Composite Plates…
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ASTM International Subcommittee C28.07 on Ceramic Matrix Composites has formed a task group to address the evaluation of fiber-reinforced ceramic matrix composite structures for a future generation of nuclear energy systems. Subcommittee C28.07 is under the jurisdiction of Committee C28 on Advanced Ceramics. The new task group was formed at the January meeting of Subcommittee C28.07. To advance…