Size Effects and Mechanical Properties of Thin Copper Foils. * University of Applied Sciences Augsburg, Germany ** ETH Zürich, Switzerland. J. Villain*, Ch. Weippert* G. Simons **, J. Dual**. Aim of the work. Thermo mechanical simulations are necessary to understand the
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of Thin Copper Foils
* University of Applied Sciences Augsburg, Germany
** ETH Zürich, Switzerland
J. Villain*, Ch. Weippert*
G. Simons **, J. Dual**
The smaller the specimens the higher the strength
and the lower the ductility, no size effect for Young`s modulus.
>>>> This tendency could be observed for several materials as
We are testing copper-foils at room temperature under same conditions (thickness: 10µm, 20 µm, 34 µm, 50 µm, 100 µm, 250 mm; same relation of thickness, width and gauge length; texture; hardness; strain velocity).
(10 µm, 34 µm)
Surface of a 20 µm Specimen near Fracture
(Source: S.I.S., Rastersonden- und Sensor-messtechnik GmbH, Herzogenrath)
A strong decrese of the elongation at rupture and a smooth increase of the ultimate tensile strength with lower thickness of the copper foils