https://mechcalc.net/blog/en/tags/failure-assessment-line/ Recent content in Failure Assessment Line on MechCalc how-to Guide https://mechcalc.net/blog/og-default.png https://mechcalc.net/blog/og-default.png Hugo en Sat, 04 Jul 2026 10:00:00 +0200 https://mechcalc.net/blog/en/posts/bs7910-yielding-behaviour-fad/ Sat, 04 Jul 2026 10:00:00 +0200 https://mechcalc.net/blog/en/posts/bs7910-yielding-behaviour-fad/ How a material's yielding behaviour changes the failure assessment line (FAL) in a BS 7910 fracture assessment. What yielding is, how continuous and discontinuous yielding (the Lüders plateau) differ, which materials fall into each group, how to make a safe assumption when you are not sure, and how Option 1 (swap the equations) and Option 2 (one equation, with a Lüders-strain step added to the reference strain) each handle the two cases. With original stress-strain and failure-assessment-line figures, the code equations, and a live online calculator. https://mechcalc.net/blog/en/posts/bs7910-clause7-fad-options/ Fri, 03 Jul 2026 21:00:00 +0200 https://mechcalc.net/blog/en/posts/bs7910-clause7-fad-options/ A walkthrough of the three assessment options of the BS 7910:2019 Clause 7 Failure Assessment Diagram (FAD): Option 1 (yield/tensile strength only), Option 2 (true stress-true strain curve), and Option 3 (elastic-plastic J-integral). The code equations and their physical reading, how the three failure assessment lines step up in data need, accuracy and conservatism, when to choose which, and the low-strain-hardening exception — with an original comparison figure and a live online calculator.