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The overall usefulness of the bursting energy absorption (BEA) was studied for a better analysis of paper strength properties. Additionally, the changes of the BEA during more complex deformations of paper products, e.g., preliminary or simultaneous tensile and burst, were determined. For the purpose of the research, an experimental setup was designed. The results showed that the correlation between BEA and bursting strength was linear, but the proportionality strongly depended on paper grade. Thus, a more accurate method to characterize the bursting resistance (BR) of paper was proposed. The BR parameter is described by the three following parameters: average bursting strength, average bursting energy absorption, and the slope of the fitted linear regression curve (relationship between the bursting energy absorption and the bursting strength). This method revealed new mechanical behaviors of papers related to their preloading. [ABSTRACT FROM AUTHOR]

The article analyses an effect of paper strain rate on energy absorbed during tensile testing. The tests were carried out in the range where the effect of inertia forces could be omitted. A new calculation method is proposed to predict variations in breaking energy caused by changes in strain rate. The method was verified by laboratory tests and calculation results and its practical usefulness was confirmed. [ABSTRACT FROM AUTHOR]