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| concept | Abaqus Analysis Procedures | advanced | computational-mechanics | 2026-05-29 | 2026-05-29 | c-000055 |
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Abaqus Analysis Procedures
Definition
Abaqus analysis procedures are the high-level solution workflows that define which finite element equations are solved, how they are incremented, and which solver strategy is used for static, dynamic, stability, coupled-field, and special-purpose analyses.
How It Works
For nonlinear equilibrium, ABAQUS/Standard generally solves residual equations with Newton iteration. Each increment linearizes the equations about the current state, solves a tangent system for a correction, updates the solution, and checks force residuals and correction sizes for convergence.
The manual also covers modified and quasi-Newton strategies, automatic time or load incrementation, cutbacks when convergence fails, and specialized procedures such as Riks-type postbuckling, direct and modal dynamics, harmonic response, heat transfer, diffusion, pore pressure, coupled fluid-solid response, piezoelectric response, substructuring, submodeling, fracture mechanics, and design sensitivity analysis.
The user guide adds the execution-facing side of procedure choice: procedure keywords appear inside analysis steps, are checked by syntax or data-check runs, and determine which output, restart, and resource patterns matter for the job.
Volume II of the user guide expands the procedure catalog in detail: static, buckling, postbuckling, quasi-static, cyclic and fatigue, implicit and explicit dynamics, steady-state dynamics, modal procedures, heat transfer, thermal-stress, fluid, electromagnetic, pore-fluid, mass diffusion, acoustic, Aqua, and annealing procedures. It also distinguishes general steps from linear perturbation steps.
Why It Matters
The procedure determines the mathematical problem more strongly than the element mesh alone. A shell or solid model can behave very differently under static equilibrium, implicit dynamics, explicit dynamics, eigenvalue extraction, postbuckling path following, or coupled thermal-stress analysis.
Connections
- Nonlinear Finite Element Analysis supplies the residual, tangent, increment, and convergence framework.
- Static Equilibrium Equation Solvers covers the algebraic solve at each static or nonlinear iteration.
- Direct Time Integration Methods covers transient procedures and the implicit/explicit time-stepping contrast.
- Finite Element Eigenproblem Solvers covers modal, frequency, and buckling extraction procedures.
- Abaqus Job Execution Workflow is where procedure definitions become runnable jobs.
- Abaqus Resource and Parallel Execution explains the memory and parallel settings that differ by procedure.
- Abaqus General and Linear Perturbation Steps explains how step class affects state propagation and result interpretation.
- Abaqus Nonlinear Solution Control explains convergence and increment control inside nonlinear procedures.
- Abaqus Multiphysics Coupling and Co-simulation covers the coupled-procedure and solver-coupling paths.