Print Email Facebook Twitter The static strength of aluminium alloy sheet specimens containing one or more transverse rows of circular holes Title The static strength of aluminium alloy sheet specimens containing one or more transverse rows of circular holes Author Vlieger, H. Institution National Aerospace Laboratory NLR Date 1968-12-31 Abstract Static tests were carried out on aluminium alloy sheet specimens with one or more rows of circular holes ajid a rectangular or a staggered hole pattern to investigate the effect of the circular holes on the static tensile strength. The static efficiency is defined as the ratio of the net section fracture stress of the notched specimen and the tensile strength of the unnotched material. Considering the sheet specimens as a series of parallel strips of width equal to the hole spacing, each containing one central hole, the static efficiency of the sheet specimens appears to be equal to or larger than that of the strip. The increase of static efficiency depends on the number of holes, that is on the number of parallel elements, and on the ratio of hole diameter and hole spacing. The static efficiency of specimens with a staggered hole pattern appears to be somewhat lower than that of specimens with a rectangular array and similar values of hole spacing and row distance. To reference this document use: http://resolver.tudelft.nl/uuid:eeeaf8c2-46f2-45bd-be51-4e7e6f968c71 Publisher Nationaal Lucht- en Ruimtevaartlaboratorium Access restriction Campus only Source NLR-TR 69016 U Part of collection Aerospace Engineering Reports Document type report Rights (c) 1968 National Aerospace Laboratory NLR Files PDF NLR_TR_69016_U.pdf 21.42 MB Close viewer /islandora/object/uuid:eeeaf8c2-46f2-45bd-be51-4e7e6f968c71/datastream/OBJ/view