Damage Tolerance R-Curves Damage Tolerance R-Curves Burner2k (Aerospace) (OP) 22 Aug 16 07:02 Folks, Any good open source material which provides practical information on implementation of R-Curves for DT Design of Aerospace structures? RE: Damage Tolerance R-Curves LiftDivergence (Aerospace) 22 Aug 16 20:58 Burner2k, Not sure if this is what you are looking for (maybe you've already looked here) but there is some good info on using R-curves in the following: Farahmand - Fatigue and Fracture of High Risk Parts - Section 3.4.3 Broek - The Practical Use of Fracture Mechanics - Section 10.6 Broek - Elementary Engineering Fracture Mechanics - Section 8.3 Damage Tolerance Assessment Handbook Volume 1 - Section 2.4.1 I might also go to the NASA Technical Reports Server and search for "r-curve". It may be beneficial to look at the list of references in any reports that come up. If you can track those down they may help you. Keep em' Flying //Fight Corrosion! RE: Damage Tolerance R-Curves Burner2k (Aerospace) (OP) 23 Aug 16 17:48 Hello, I have a copy of SigmaK's FDT book. It contains some basic info along with a practical example of using R-curve for a skin panel. I got some idea about practical part of it. I have gone through 2 of 4 references you have mentioned and Broek is good for understanding the physics part of it. Thanks for your post.