Scaling Law for the Strength of Paper Structures with a Flaw, 1999 International Paper Physics Conference Proceedings
Sören Östlund,
Petri Kärenlampi
The possibility of predicting the strength of a structure with a small or intermediate-size flaw, without entering into numerical exercises, is studied using a cohesive zone crack-tip model in a linear elastic material. It is found that size-effect-scaling laws are geometry-dependent, and thus they have to be fitted separately for any geometry. Consequently, it is difficult to predict the critical nominal stress for a laboratory-size specimen. Even if the size of the body would be large in relation to the size of the flaw, there is a significant geometry dependency. An empirical modification is presented for edge-notched tension panels. However, there is no guarantee that it can be applied for other types of structures. Thus, for the time being, no sound solution is available for predicting the strength of structures with flaws of intermediate size, without numerical exercises.
Scaling Law for the Strength of Paper Structures with a Flaw, 1999 International Paper Physics Confe