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Comparison of Mechanical Test Methods Under Consideration for Durability

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Comparison of Mechanical Test Methods Under Consideration for Durability Characterization of Pultruded Composite

 

The availability of design standards is critical for the expanded use of composites in new applications; however, one aspect that is often overlooked is the need for the selection or development of appropriate standards to be utilized when characterizing materials to be used with the design standard.  This paper presents results from a series of tests conducted to compare mechanical test methods under consideration for durability characterization of pultruded composites and discusses the procedures followed in the development of new standards.  This test series was conducted in support of the development of a load and resistance factor design (LRFD) standard for pultruded composites.  Data from this test series will be applicable to the development of a new standard practice to be utilized as part of the LRFD standard for pultruded composites.  Test methods examined in this study included ASTM D 2344 short-beam testing and ASTM D 6641 combined loading compression testing; commercial pultruded composites exposed to household bleach, 20% hydrochloric acid, and distilled water immersion were characterized. Based on the lower COV for the ASTM D 2344 data, the easier sample fabrication, and the easier test setup, the use of the ASTM D 2344 short-beam strength method is recommended as the standard test method to be used for property evaluation in a newly developed standard for the determination of durability data for pultruded composites intended for use in the design of structures.

 

Authors: Ellen Lackey and Ryan Hedgepeth

 

Conference: CAMX 2016 – Anaheim

 

SKU/Code: TP16-0058

 

Pages: 11


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