Effect of Impact Damage and Holes on the Compressive Strength of a Graphite/Epoxy Laminate

Autor:	Jerry G. Williams, James H. Starnes, Marvin D. Rhodes
Rok vydání:	2009
Předmět:	Compressive strength Materials science chemistry Aluminium visual_art Failure strain visual_art.visual_art_medium chemistry.chemical_element Epoxy Graphite Stress distribution Composite material Orthotropic material
DOI:	10.1520/stp36030s
Popis:	An experimental investigation has been conducted to determine the effect of low-velocity impact damage and unloaded circular holes on the compressive strength of a 48-ply orthotropic graphite/epoxy flat laminate. Specimens were impacted by a 1.27-cm-diameter aluminum sphere with speeds from 52 to 101 m/x to simulate momenta typical of low-velocity impact hazards that can occur in commercial aircraft service. It is shown that low-velocity impact damage can significantly degrade the static compressive strength of the laminate. Specimens that fail at axial strains above 0.008 in the undamaged condition can fail at strains as low as 0.0031 when impacted at 100 m/s. Circular holes also reduce the static compressive strength of the laminate. The failure strain decreases as the hole diameter increases.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::80e37c7aaca5a7920b3346fc660eb0be https://doi.org/10.1520/stp36030s Zobrazit plný text záznamu