---
type: concept
title: "Abaqus Substructuring and Submodeling"
complexity: advanced
domain: computational-mechanics
created: 2026-05-29
updated: 2026-05-29
address: c-000083
aliases:
  - Abaqus substructures
  - Abaqus submodeling
  - Abaqus global-local modeling
tags:
  - concept
  - finite-element-method
  - abaqus
  - model-reduction
  - submodeling
status: current
related:
  - "[[Abaqus-Analysis-User-s-Guide-Volume-II|Abaqus Analysis User's Guide Volume II]]"
  - "[[Abaqus Matrix Generation and Reduced Models]]"
  - "[[Abaqus Matrix-Based Model Definition]]"
  - "[[Static Equilibrium Equation Solvers]]"
  - "[[Finite Element Modeling and Convergence Checks]]"
sources:
  - "[[Abaqus-Analysis-User-s-Guide-Volume-II|Abaqus Analysis User's Guide Volume II]]"
---

# Abaqus Substructuring and Submodeling

## Definition

Abaqus substructuring and submodeling are model-reduction and global-local analysis techniques. Substructuring condenses a collection of elements to retained degrees of freedom; submodeling drives a refined local model from results of a coarser global model.

## How It Works

Substructures eliminate internal degrees of freedom on the basis of linear response while retaining boundary degrees of freedom for connection to the rest of the model. After generation, a substructure can be used like an element with stiffness, optional mass, damping, and scalable load vectors. It is useful when identical components recur, when large mostly linear regions can be reused, or when local nonlinearities can be isolated.

Submodeling uses global analysis results to prescribe driven variables on a local model. Node-based submodeling interpolates nodal results such as displacements, temperatures, or pressures. Surface-based submodeling interpolates stress results on driven element faces. The submodel can use a refined mesh, different element types, or even a different Standard/Explicit procedure sequence when the local behavior has limited feedback on the global response.

## Why It Matters

Both techniques are practical responses to finite element scale. They reduce cost while preserving targeted detail, but they rely on a clear separation between global behavior, local behavior, and the degrees of freedom or result fields used to connect them.

## Connections

- [[Static Equilibrium Equation Solvers]] includes the static condensation and reduced-system context.
- [[Abaqus Matrix Generation and Reduced Models]] covers the matrix exchange side of reduced modeling.
- [[Finite Element Modeling and Convergence Checks]] supplies the judgment needed to decide whether a local refined model is valid.

## Sources

- [[Abaqus-Analysis-User-s-Guide-Volume-II|Abaqus Analysis User's Guide Volume II]]