kashoo

I need to get the Fracture Toughness of Honeycomb Sandwich Panles of Aluminum & GFRP facings such that i want to get in the microscopic analysis with the help of SEM & TEM (Scanning Electron Microscope) (Transmission Electron Microscope)......what is the procedure of making specimen of honeycomb core ....coz it is quite ductile & it doesnt remain in shape of hexagons whne compress in a mould...