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ASTM standardizes pull-through resistance method.

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August 17, 2007 - Developed by Subcommittee D30.05 on Structural Test Methods, D 7332/D 7332M Standard assesses capability of composite plate to resist force pulling mechanical fastener through plate. It will be used in development of data to analyze and substantiate mechanically fastened joint designs in structures composed of composite materials. Examples include materials that are subject to out-of-plane loadings such as bolted connections between skin and substructure in pressurized aircraft fuselage.

ASTM Committee on Composite Materials Standardizes Pull-Through Resistance Method


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ASTM International
100 Barr Harbor Dr., Box C700
West Conshohocken, PA, 19428-2959
USA



Press release date: August 1, 2007

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 Fiber-Reinforced Polymer Matrix Composite, is based upon procedures previously published in the Composite Materials Handbook (CMH-17), for which no standardized test methods have previously existed. D 7332/D 7332M assesses the capability of a composite plate to resist force pulling a mechanical fastener through a plate (force is applied to the fastener perpendicular to the plane of the plate). Adam J. Sawicki, chair of Subcommittee D30.05 and Technical Fellow, Structures Technology, The Boeing Company, says that the standard will be used in the development of data to analyze and substantiate mechanically fastened joint designs in structures composed of composite materials. He says that the most important examples of this include materials that are subject to out-of-plane loadings such as bolted connections between the skin and substructure in a pressurized aircraft fuselage. Sawicki says that Subcommittee D30.05 is seeking additional participation from the marine, automotive/ground vehicle and civil infrastructure industries to improve the applicability of D30.05 standards in those areas. He also notes that the subcommittee plans to expand the scope of D 7332 in future revisions to include pull-through testing of bolted attachments in sandwich structures. ASTM International standards are available for purchase from Customer Service (phone: 610/832-9585; service@astm.org) or at www.astm.org.

For further technical information, contact Adam J. Sawicki, Boeing Company, Philadelphia, Pa. (phone: 610/591-2807; adam.j.sawicki@boeing.com). Committee D30 will meet Oct. 29-30 at ASTM International Headquarters in West Conshohocken, Pa. For membership or meeting information, contact James Olshefsky, Technical Committee Operations, ASTM International (phone: 610/832-9714; jolshefs@astm.org).
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