%0 journal article
%@ 1350-6307
%A Brocks, W., Anuschewski, P., Scheider, I.

%D 2010
%J Engineering Failure Analysis
%N 3
%P 607-616 
%R doi:10.1016/j.engfailanal.2009.03.021
%T Ductile Tearing Resistance of Metal Sheets
%U https://doi.org/10.1016/j.engfailanal.2009.03.021
3 
%X The concept of R-curves has been adopted to characterise stable crack extension and predict residual strength of thin-walled structures particularly in the aircraft industry. The present contribution uses results of FE simulations of crack extension in panels by the cohesive model to validate analytical procedures for determining J-integral values at large crack extension from measurable quantities, namely the force vs. displacement records. The numerically determined J-integral is taken as the benchmark for the outcome of the analytical formulas. The geometry dependence of J and CTOD based R-curves is investigated and alternative concepts like CTOA and dissipation rate at crack extension are discussed.