forked from 1b-agent/fieldcraft-upstream
Erkin Alp Güney
18be60672b
The Scordelis-Lo roof and the pinched cylinder had their published references cited but no recipe, because mesh.block's 2D form is planar and cannot build a curved patch. Both are now active: the mesh is written node by node (mesh.node.add / mesh.element.add, the route docs/verification.md allows), the same cylinder patch the solver's own benchmarks.rs builds in code, with the quarter/eighth symmetry planes, the rigid diaphragm and the published load. - scordelis-lo-roof-shell: 16x16 flat quad4 (MITC4) shells, R = 25, t = 0.25, self-weight 90 per area; u_z at the free-edge mid-span -0.3024 within 2% (ours -0.29901009815961804, 1.12% low). - pinched-cylinder: 32x32 flat quad4 shells, R = 300, t = 3, a quarter of the unit pinch; u under the load -1.8248e-5 within 2% (ours -1.803845342860719e-05, 1.15% low). Each README carries the generator (so the recipe is reproducible), the refinement study the tolerance reason cites, and how the reference was cited before. pinched-hemisphere and mh-twisted-beam now say what they actually wait for: a doubly curved or helical shell mesh written node by node, not missing shell elements.
15 lines
770 B
JSON
15 lines
770 B
JSON
{
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"title": "Hemispherical shell with an 18° hole under alternating point loads",
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"kind": "benchmark",
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"source": "MacNeal and Harder, 'A proposed standard set of problems to test finite element accuracy', Finite Elements in Analysis and Design 1 (1985) 3–20, Fig. 9 (p. 9), Table 5(b) (p. 11): 0.0940 (lower bound 0.0924 from their [7])",
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"status": "pending",
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"requires": "a doubly curved shell mesh: mesh.block's 2D form is planar and takes z = 0, so the quarter hemisphere with its 18° polar hole must be written node by node (as scordelis-lo-roof-shell and pinched-cylinder are), or a new patch command must mesh a doubly curved face",
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"quantities": [
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{
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"id": "u",
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"quantity": "displacement under the load along the load",
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"value": 0.094
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}
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]
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}
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