Philip Dai 20 hours ago 1 min DNV pipeline plastic moment approximations Compare two formula Numerically (dt ≈ 15–45): the constant 1/3 is tiny compared to dt^2, so the two formulas are practically identical. Formula 1 is the exact CHS plastic moment written via dt and t. Formula 2 is a slightly simplified DNV approximation—replace 4/3 with 1 to get a neat (dt−1)^2 term. For realistic pipeline D/t, that simplification changes the result by well under 1%, which is why they feel “almost identical” in practice. See some comparisons below for D/t of 10, 15 and 20.
Philip Dai Jan 6 1 min Sorting nodes from a Node Set Asked Copilot " abaqus python sort node list based on x coordinate " Got a number of answers, actually quite useful i.e., this process tends to eliminate the need to read Abaqus manual. This is one of the useful answers that easy to adopt. p = mdb.models['Model-1'].parts['Part-1'] nset = p.nodeSets['MY_SET'] # or getSetFromNodeLabels, etc. # create a list of nodes objects sorted by X coordinates nodes_sorted = sorted(nset.nodes, key=lambda n: n.coordinates[0]) labels_sorted = [n.label for n...
