The Diametrically Loaded Cylinder for the Study of Nanostructured Aluminum--Graphene and Aluminum--Alumina Nanocomposites Using Digital Image Correlation. Front. Mater. 3: 22. doi: 10.3389/fmats. 2016.00022 The Diametrically Loaded Cylinder for the Study of Nanostructured Aluminum--Graphene and Aluminum--Alumina Nanocomposites Using Digital Image Correlation Meysam Tabandeh-Khorshid 1