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1 Journal of Polish CIMAC

1 2012

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Investigating the size effect for the small-dimension specimens made from the EN AW-6063 aluminium alloy

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Tomaszewski T. , Sempruch J. , Piątkowski T.

Journal of Polish CIMAC

2012

tom Vol. 7, no 3

339-346

The paper concerns the size effect on fatigue life and fatigue strength. As for the mini specimens, smaller than the normative specimens, they show an increase in fatigue life with a decrease in the object cross-section area. Theoretically the calculational models assume a lack of sensitivity of the aluminum alloys to changes in the crosssection size, which is contrary to the experimental tests. The paper has been an attempt at determining the size effect for EN AW-6063 aluminum alloy mini specimens. Monotonic and fatigue tests were made. There were observed correlations of the results for the coefficient of material sensitivity to change in the cross-section. The results have made it possible to define the relationship of the ultimate tensile strength and fatigue strength for the specimens of various size.