11 August 2007
11 August 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.
The American Composites Manufacturers Association participated in a roundtable discussion about the IMAGINE Act. Known as the Innovative Materials in American Growth and Infrastructure, Newly Expanded (IMAGINE) Act, the new bill is designed to promote the increased use of innovative materials like fibre reinforced polymer (FRP) composites, as well as new manufacturing methods to accelerate the deployment and extend the life of infrastructure projects.
After the collapse of a drinking water pipeline in downtown Amsterdam, the Netherlands, Insituform was contracted to reline a close to 100 year old pipe underneath one of the canals. Water was restored successfully within five days, with minimal impact on traffic and the environment.
Innovators and industry pioneers will gather to discuss the latest applications of graphene nanotubes at the Nanoaugmented Materials Industry Summit (NAUM) 2018 in Shanghai, China, on 31 October. Visitors will also be able to see an on-site demonstration of the production of nanoaugmented products with real industrial equipment.