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wiki/sources/Midas-FEA-Analysis-Manual.md

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+---
+type: source
+title: "Midas FEA Analysis Manual"
+source_type: manual
+publisher: "[[MIDAS Information Technology]]"
+product: "[[midas FEA]]"
+created: 2026-06-02
+updated: 2026-06-02
+address: c-000142
+aliases:
+  - Midas FEA Analysis and Algorithm Manual
+  - MIDAS FEA Analysis Manual
+  - midas FEA Analysis Manual
+tags:
+  - source
+  - finite-element-method
+  - midas-fea
+  - analysis-manual
+  - nonlinear-analysis
+status: current
+raw_path: ".raw/MidasFEAAnalysisManual/"
+source_files:
+  markdown_files: 51
+  markdown_bytes: 739213
+  image_files: 1624
+  image_bytes: 14029312
+related:
+  - "[[MIDAS Information Technology]]"
+  - "[[midas FEA]]"
+  - "[[midas Civil]]"
+  - "[[midas NFX]]"
+  - "[[Midas-Civil-Analysis-Reference|Midas Civil Analysis Reference]]"
+  - "[[Midas-NFX-Analysis-Manual|Midas NFX Analysis Manual]]"
+  - "[[Midas FEA Analysis Workflow]]"
+  - "[[Midas FEA Element Library]]"
+  - "[[Midas FEA Concrete Cracking and Material Models]]"
+  - "[[Midas FEA Nonlinear Solution Algorithms]]"
+  - "[[Midas FEA Linear Dynamics and Buckling Analyses]]"
+  - "[[Midas FEA Heat Transfer and Hydration Analysis]]"
+  - "[[Midas FEA Static Contact Analysis]]"
+---
+
+# Midas FEA Analysis Manual
+
+## Scope
+
+This source is the analysis and algorithm manual for [[midas FEA]], a civil and bridge-oriented nonlinear detail analysis program from [[MIDAS Information Technology]]. The raw source covers element formulations, material models, general algorithms, linear analysis procedures, construction stage analysis, heat transfer and hydration, contact, fatigue, and CFD.
+
+The manual is useful in this vault because it adds a second production-solver reference beside the Abaqus manuals. Abaqus pages describe a broad general-purpose FE platform; the Midas manual emphasizes civil structural nonlinear analysis, concrete cracking, construction stages, hydration heat, static contact, fatigue checks, and wind-related CFD.
+
+[[Midas-Civil-Analysis-Reference|Midas Civil Analysis Reference]] is the sibling MIDAS product reference for bridge/civil member analysis, seismic procedures, staged construction, prestress, moving loads, and civil design utilities. [[Midas-NFX-Analysis-Manual|Midas NFX Analysis Manual]] is the sibling MIDAS reference for general-purpose structural, field, contact, fatigue, optimization, and forming-limit analysis workflows.
+
+## Extracted Threads
+
+- [[Midas FEA Analysis Workflow]] - how the manual packages modeling, solver choice, analysis procedure, and result interpretation.
+- [[Midas FEA Element Library]] - truss, beam, plane stress, plate, plane strain, axisymmetric, solid, spring, rigid link, and geometric-nonlinearity element coverage.
+- [[Midas FEA Embedded Reinforcement Modeling]] - rebar bar and grid reinforcement embedded in continuum or plate host elements, including prestress context.
+- [[Midas FEA Interface Elements and Nonlinearities]] - point, line, and surface interfaces plus crack, bond-slip, friction, and masonry-joint nonlinearities.
+- [[Midas FEA Concrete Cracking and Material Models]] - plasticity, total strain crack models, concrete tension/compression behavior, and interface material laws.
+- [[Midas FEA Nonlinear Solution Algorithms]] - boundary/load handling, equation solvers, Newton variants, arc-length iteration, and convergence checks.
+- [[Midas FEA Linear Dynamics and Buckling Analyses]] - static, modal, time history, response spectrum, and eigenvalue buckling workflows.
+- [[Midas FEA Construction Stage Analysis]] - activation/deactivation, concrete age, creep, shrinkage, and stage-wise load/state transfer.
+- [[Midas FEA Heat Transfer and Hydration Analysis]] - heat transfer, hydration heat, equivalent age, thermal stress, and crack ratio output.
+- [[Midas FEA Static Contact Analysis]] - penalty contact, contact search, master/slave choice, weld contact, and general contact.
+- [[Midas FEA Fatigue Analysis]] - stress-life fatigue, rainflow counting, mean stress correction, and Miner damage.
+- [[Midas FEA CFD Analysis]] - 2D structured-grid RANS CFD for wind-load and aerodynamic coefficient workflows.
+
+## Solver Development Value
+
+For custom solver development, the manual is most valuable as a reference for production-level feature boundaries. It shows which choices must be made explicit in requirements and tests: element family, nonlinear material law, boundary/load conversion, direct versus iterative solver selection, convergence criteria, modal/eigen extraction, construction stage state transfer, contact search, and result quantities.
+
+## Connections
+
+- [[Finite Element Method]] gives the shared discretization base.
+- [[Finite Element Program Implementation]] frames the input, assembly, solve, recovery, and output contract.
+- [[Nonlinear Finite Element Analysis]] gives the common incremental solution context.
+- [[Finite Element Plasticity]], [[Plasticity Yield Criteria]], and [[Plastic Flow Rules and Hardening]] connect to the manual's plastic material model descriptions.
+- [[Finite Element Contact Formulation]] connects to Midas contact and interface behavior.
+- [[Finite Element Heat Transfer and Field Problems]] and [[Finite Element Thermal Stress Analysis]] connect to the thermal and hydration workflows.
+- [[Midas-Civil-Analysis-Reference|Midas Civil Analysis Reference]] connects the same MIDAS ecosystem to bridge-oriented structural analysis and design workflows.
+- [[Midas-NFX-Analysis-Manual|Midas NFX Analysis Manual]] connects the same MIDAS ecosystem to broader general-purpose FE solver-kernel workflows.