SCIENTIFIC AND TECHNICAL AEROSPACE REPORTS
A Biweekly Publication of the National Aeronautics and Space Administration
VOLUME 44, ISSUE 4 - February 24, 2006
24 COMPOSITE MATERIALS
Includes physical, chemical, and mechanical properties of laminates and other composite materials.
20060005680 Forest Products Lab., Madison, WI USA
Two-Year Wisconsin Thermal Loads for Roof Assemblies and Wood, Wood Plastic Composite, and Fiberglass Shingles
Winandy, J. E.; Grambsch, M.; Hatfield, C. A.; Nov. 2005; 20 pp.; In English Report No.(s): PB2006-101580; FPL-RN-0301; No Copyright; Avail.: CASI: A03, Hardcopy
Temperature histories for various types of roof shingles, wood roof sheathing, roof rafters, and non-ventilated attics are being monitored in outdoor attic structures using simulated North American light-framed construction. This report presents 2-year data histories for annual thermal loads for western red cedar, wood-thermoplastic composite, and fiberglass shingles and for wood-based composite roof sheathing, wood rafters, and attics under these shingles. NTIS
Composite Materials; Glass Fibers; Loads (Forces); Roofs; Wood
20060005720 Forest Products Lab., Madison, WI USA
Comparison of Block Shear Methods for Determining Shearing Strength of Solid Wood
Feb. 1964; 30 pp.; In English Report No.(s): PB2006-102797; FPL-030; No Copyright; Avail.: CASI: A03, Hardcopy
Information concerning the relative magnitudes of shear strength as determined by using cube-shaped or notched specimens in roller or nonroller testing apparatus has often been contradictory. This document describes a comparative study, conducted at the U.S. Forest Products Laboratory and the Australian C.S.I.R.O. Division of Forest Products on six different specimen-apparatus combinations using matched specimens of southern yellow pine and overcup oak. NTIS
Shearing; Wood
20060005748 Kentucky Univ., Lexington, KY USA
Shear Repair of P/C Box Beams Using Carbon Fiber Reinforced Polymer (CFRP) Fabric
Simpson, J. W.; Harik, I. E.; Chiaw, C. C.; Jan. 2006; 46 pp.; In English Report No.(s): PB2006-101651; DTC-06-01/FRT114-01-1F; No Copyright; Avail.: CASI: A03, Hardcopy
The report documents the retrofit work carried out on the KY3297 Bridge over Little Sandy River in Carter County, Kentucky. Field investigation and evaluation revealed that the bridge superstructure was deficient in shear. The repair work was carried out using externally bonded carbon fiber reinforced polymer (CFRP) fabric system. The repair, using externally bonded fiber system, offers the following benefits: (1) the use of light construction equipment, hand kits and tools, (2) minimal traffic disruption as all lanes were open to traffic while work was being performed underneath the bridge, and (3) cost saving; the cost for the repair and 3-years monitoring was USD $105,000.00 compared to the estimated superstructure replacement cost of USD $600,000.00. NTIS
Box Beams; Carbon Fiber Reinforced Plastics; Carbon Fibers; Composite Materials; Concretes; Fabrics; Fiber Composites; Shear Strength
Source: NASA
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