add documents and wiki

wiki/concepts/Finite Element Modeling and Convergence Checks.md

@@ -4,7 +4,7 @@ title: "Finite Element Modeling and Convergence Checks"
 complexity: intermediate
 domain: computational-mechanics
 created: 2026-05-29
-updated: 2026-05-29
+updated: 2026-06-02
 address: c-000069
 aliases:
   - finite element modeling checks
@@ -27,10 +27,21 @@ related:
   - "[[Abaqus Output Database and Results Files]]"
   - "[[Abaqus Adaptivity and Mesh Replacement]]"
   - "[[Abaqus Structural Optimization and Parametric Studies]]"
+  - "[[Midas FEA Analysis Workflow]]"
+  - "[[Midas FEA Fatigue Analysis]]"
+  - "[[Midas Civil Numerical Analysis Model]]"
+  - "[[Midas Civil Boundary Supports and Links]]"
+  - "[[Midas Civil Moving Load Bridge Analysis]]"
+  - "[[Midas NFX Analysis Workflow]]"
+  - "[[Midas NFX Fatigue Analysis]]"
+  - "[[Midas NFX Structural Optimization and Forming Limit Analysis]]"
 sources:
   - "[[A-First-Course-in-the-Finite-Element-Method|A First Course in the Finite Element Method]]"
   - "[[Abaqus-Analysis-User-s-Guide-Volume-I|Abaqus Analysis User's Guide Volume I]]"
   - "[[Abaqus-Analysis-User-s-Guide-Volume-II|Abaqus Analysis User's Guide Volume II]]"
+  - "[[Midas-FEA-Analysis-Manual|Midas FEA Analysis Manual]]"
+  - "[[Midas-Civil-Analysis-Reference|Midas Civil Analysis Reference]]"
+  - "[[Midas-NFX-Analysis-Manual|Midas NFX Analysis Manual]]"
 ---
 
 # Finite Element Modeling and Convergence Checks
@@ -49,6 +60,12 @@ The Abaqus user guide adds output and execution checks to this modeling view. Fi
 
 Volume II adds model-evolution checks: adaptive meshing, remeshing, mesh-to-mesh mapping, submodeling, optimization, and parametric studies all require the analyst to verify that transferred state, changed meshes, local models, and repeated design runs still represent the intended physics.
 
+[[Midas-FEA-Analysis-Manual|Midas FEA Analysis Manual]] reinforces the same reliability point from a product manual perspective: analysts must understand the theory, selected models, solver controls, and result quantities before trusting production FE output. Its fatigue workflow also makes stress interpretation and mesh-dependent stress concentration checks explicit.
+
+[[Midas-Civil-Analysis-Reference|Midas Civil Analysis Reference]] reinforces the bridge/civil version of the same point: node local axes, element type, section stiffness, support idealization, rigid offsets, moving-load lanes, and staged construction assumptions can change the result as much as the numerical solver.
+
+[[Midas-NFX-Analysis-Manual|Midas NFX Analysis Manual]] adds general-purpose checks around coordinate-system selection, element result locations, stress-error output, fatigue stress histories, optimization response definitions, and forming-limit interpretation. These are postprocessing checks as much as solver checks.
+
 ## Why It Matters
 
 Finite element output is numerical, not automatically reliable. Many errors are modeling errors rather than solver errors: the wrong idealization, poor element shapes, overly coarse meshes, misunderstood symmetry constraints, or overinterpretation of stress near singularities.
@@ -62,9 +79,15 @@ Finite element output is numerical, not automatically reliable. Many errors are
 - [[Abaqus Resource and Parallel Execution]] affects whether large model checks can be run efficiently enough to support refinement.
 - [[Abaqus Adaptivity and Mesh Replacement]] describes mesh changes driven by distortion control, accuracy, and solution mapping.
 - [[Abaqus Structural Optimization and Parametric Studies]] turns modeling checks into repeated design-space checks.
+- [[Midas FEA Analysis Workflow]] and [[Midas FEA Fatigue Analysis]] connect modeling reliability to Midas procedure selection and stress-life postprocessing.
+- [[Midas Civil Numerical Analysis Model]], [[Midas Civil Boundary Supports and Links]], and [[Midas Civil Moving Load Bridge Analysis]] connect modeling reliability to bridge member idealization, support/link assumptions, and vehicle-load generation.
+- [[Midas NFX Analysis Workflow]], [[Midas NFX Fatigue Analysis]], and [[Midas NFX Structural Optimization and Forming Limit Analysis]] connect modeling reliability to NFX result coordinates, stress histories, design responses, and forming-limit checks.
 
 ## Sources
 
 - [[A-First-Course-in-the-Finite-Element-Method|A First Course in the Finite Element Method]]
 - [[Abaqus-Analysis-User-s-Guide-Volume-I|Abaqus Analysis User's Guide Volume I]]
 - [[Abaqus-Analysis-User-s-Guide-Volume-II|Abaqus Analysis User's Guide Volume II]]
+- [[Midas-FEA-Analysis-Manual|Midas FEA Analysis Manual]]
+- [[Midas-Civil-Analysis-Reference|Midas Civil Analysis Reference]]
+- [[Midas-NFX-Analysis-Manual|Midas NFX Analysis Manual]]