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Methods for evaluating tensile and compressive properties of plastic laminates reinforced with unwoven glass fibersAuthor(s): Karl Romstad
Source: Research note FPL no. 052. Madison, WI : USDA, Forest Service, Forest Products Laboratory. 12,  pages.
Publication Series: Research Note (RN)
Station: Forest Products Laboratory
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DescriptionMethods of obtaining strength and elastic properties of plastic laminates reinforced with unwoven glass fibers were evaluated using the criteria of the strength values obtained and the failure characteristics observed. Variables investigated were specimen configuration and the manner of supporting and loading the specimens. Results of this investigation indicate that satisfactory tensile failures can be obtained by reinforcing the shank portion of the tension specimen with 1/32-inch sheet aluminum. Variation of tensile specimen geometry was inconclusive, with at least partial failures always occurring in the shank portion. Difficulty was encountered in trying to obtain accurate compressive strength data on the composite material comprising these laminates. Some acceptable compression failures were obtained using a 5-1/8-inch-long specimen clamped at the ends and supported laterally by the standard FTM-406 jig, described in the Federal Test Method Standard No. 406. Failures varied for different laminates, indicating that resin properties may control failure when the material acts as a composite.
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CitationRomstad, Karl 1964. Methods for evaluating tensile and compressive properties of plastic laminates reinforced with unwoven glass fibers. Research note FPL no. 052. Madison, WI : USDA, Forest Service, Forest Products Laboratory. 12,  pages.
KeywordsGlass fibers, loads, tensile strength, failure, compressive strength, shanks, elastic properties
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