Journal
THIN-WALLED STRUCTURES
Volume 163, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.tws.2021.107764
Keywords
Fiber buckling; Thermal damage; Pultrusion; Post-fire; Residual strength
Categories
Funding
- University of Dayton's Center for Flame Retardant Material Science
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This experimental study evaluates the residual strengths and failure mechanisms of bolted double lap pultruded joints in regions of low-to-moderate heat induced exposure, finding that plate thickness and load direction are key parameters influencing the residual strength and failure modes of thermally degraded pultruded joints.
Continued operation of thermally degraded composite joints due to fire or over-temperature events could result in a catastrophic failure. This experimental study evaluates the residual strengths and failure mechanisms of bolted double lap pultruded joints in regions of low-to-moderate heat induced exposure. Test parameters included, flat plate thickness, heat flux exposure, and load direction with respect to the member?s pultrusion axis. Post-mortem micrograph, SEM, and X-ray CT images highlighted the nature of the damage as related to observed strengths? reductions. Plate thickness and load direction are key parameters influencing the residual strength and failure modes of thermally degraded pultruded joints.
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