Tensile test data of a 9 microns thick aluminium foil

Material testing data from tensile tests performed on an aluminium AA8079 alloy. The specimens are 100mm long and have a cross section of 10x0.009mm^2. Specimens are cut tested in 0°, 10°, ...40°, 45°, 50°, 60°, ....90° clock wise to the direction of rolling during manufacturing of the foil. Unfortunately the precise meaning of "clock wise" vis á vis the rolling direction and side of the foil is not known but is consistent in this text. The naming of the files reveal the direction of the test and the specimen no. for the respective direction, e.g "45_RawDataySpecimen_2" is to the second specimen tested in a direction 45° clock wise to the rolling direction.

The tests are described in detail in B. Käck & C. Malmberg, Master thesis: Aluminium foil at multiple length scales, mechanical tests and numerical simulations in abaqus (2015), div. of Solid Mechanics, Lund Institute of Technology, Sweden.

The tests were evaluated in "On the stiffness tensor in AA8079 at small and intermediate strains" by E. Andreasson, W. Reheman, P. Ståhle and S. Kao-Walter, submitted for publication. The major discoveries were that 1) plastic deformation appear almost immediately, i.e., practically at zero load, 2) the compliances increase linearly with strain, from the value of the inverse elastic modulus to almost five times that  3) principal material directions are not along the rolling direction but rather 5° to 15° anti-clock wise from the rolling direction and finally 4) there is a minimum stress in the region of between 35° to 45° clock wise from the rolling direction and for symmetry reasons also at 55° to 65° in the anti-clock wise direction.