Abaqus Introduction & Spatial Modeling Guide

What's New

Introduction to Abaqus

Overview of the Abaqus Finite Element System

Abaqus Products

Overview of Abaqus Guides

Demonstrating Abaqus Capabilities

Input Syntax Rules

Keyword Lines

Data lines

Conventions

Degrees of Freedom

Coordinate Systems

Units

Time Measures

Local Tangent Directions on Surfaces in Space

Convention Used for Stress and Strain Components

Stress and Strain Measures

Stress Invariants

Finite Rotations

Abaqus Model Definition

The Input File

Model Data

History Data

Including Model or History Data from an External File

Parametric Modeling

Introduction

Parameters

Parametrization of Input Quantities

Python Language

Execution of Parametrized Input

Display of Parametric Input

References

Spatial Modeling

Node Definition

Node Definition

Assigning a Node Number to the Node

Specifying a Local Coordinate System in Which to Define Nodes

Defining Individual Nodes by Specifying Their Coordinates

Grouping Nodes into Node Sets

Transferring of Node Sets

Creating Nodes from Existing Nodes by Generating Them Incrementally

Creating Nodes by Copying Existing Nodes

Creating Nodes by Filling in Nodes between Two Bounds

Mapping a Set of Nodes from One Coordinate System to Another

Parametric Shape Variation

Parametrization of Nodal Coordinates

Shape Change by Linear Combination of Shape Variations

Shape Parametrization Using Shape Variations

Shape Parametrization and Design Sensitivity Analysis

Nodal Thicknesses

Defining Nodal Thicknesses

Specifying a Continuously Varying Thickness for Shell, Membrane, and Rigid Elements

Normal Definitions at Nodes

Contact Surfaces in Abaqus/Standard

Elements

The Coordinate System in Which Normals Are Defined

Transformed Coordinate Systems

Defining a Local Coordinate System

Output at a Node Associated with a Coordinate Transformation

Adjusting Nodal Coordinates

Adjusting Nodal Coordinates

Element Definition

Element Definition

Assigning an Element Number to the Element

Defining Individual Elements by Specifying Their Nodes

Grouping Elements into Element Sets

Transferring of Element Sets

Creating Elements from Existing Elements by Generating Them Incrementally

Creating Elements by Copying Existing Elements

Element Foundations

Defining Element Foundation Behavior

Defining Reinforcement

Defining a Rebar Layer

Defining Rebar in Abaqus/Standard Beam Elements

Defining the Rebar Material

Initial Conditions

Output

Defining Rebar as an Element Property

Assigning a Name to the Rebar Set

Defining Rebars in Three-Dimensional Shell and Membrane Elements

Defining Rebars in Axisymmetric Shell and Membrane Elements

Defining Rebars in Continuum Elements

Defining the Rebar Material

Initial Conditions

Output

Orientations

Assigning a Name to an Orientation

Defining a Local Coordinate System in a Model That Contains an Assembly of Part Instances

Defining a Local Coordinate System Directly

Defining Fiber Dispersion for Multiscale or Short-Fiber Reinforced Linear Composite Materials in Abaqus/Explicit

Defining Local Material Directions for Anisotropic Hyperelastic Materials

Defining Yarn Directions in the Reference Configuration for a Fabric Material

Defining a Local Coordinate System in Abaqus/Standard Using a User Subroutine

Multiple References to an Orientation Definition

Large-Displacement Considerations

Use with Two-Dimensional Solid Elements

Use with Shell, Continuum Solid Shell, Membrane, or Gasket Elements or with Contact Surfaces

Use with Laminated Shells

Use with Laminated Three-Dimensional Solid and Continuum Solid Shell Elements

Use with Pipe-Soil Interaction Elements

Use with Beam, Frame, and Truss Elements

Use with the Fabric Material Model

Use with the Jointed Material Model

Use with Rotary Inertia and Connector Elements

Use with the Kinematic Coupling Constraint

Use with Surface-Based Coupling Constraints

Use with Inertia Relief

Use with Distributed General Traction, Shear Traction, and General Edge Loads

Orientations Defined with Distributions

Output

Surface Definition

About Surfaces

Why Use Surfaces?

Restrictions on Surfaces

Element-Based Surface Definition

Defining Element-Based Surfaces

General Restrictions on Element-Based Surfaces

Surface Discretization

Creating Surfaces on Solid, Continuum Shell, and Cohesive Elements

Creating Surfaces on Structural, Surface, and Rigid Elements

Creating Surfaces on Gasket Elements

Creating Interior Cross-Section Surfaces

Whole-Model Free Surface in an Abaqus/Explicit Input File

Trimming the Perimeter of an Open Surface

Node-Based Surface Definition

Creating a Node-Based Surface

Analytical Rigid Surface Definition

What Are Analytical Rigid Surfaces and Why Use Them?

Creating an Analytical Rigid Surface

Creating an Analytical Rigid Surface in a User Subroutine

Defining Analytical Rigid Surfaces When Drag Chain or Rigid Surface Elements Are Used

Eulerian Surface Definition

What Are Eulerian Surfaces and Why Use Them?

Creating an Eulerian Surface

Operating on Surfaces

Creating a Combined Surface

Creating a Cropped Surface

Rigid Body Definition

What Is a Rigid Body?

Determining When to Use a Rigid Body

Creating a Rigid Body

Rigid Body Mass and Inertial Properties

Kinematics of a Rigid Body

Defining Loads on Rigid Bodies

Rigid Bodies with Temperature Degrees of Freedom

Thermal Expansion of a Rigid Body

Modeling Contact with a Rigid Body

Using Rigid Bodies in Geometrically Linear Abaqus/Standard Analysis

Integrated Output Section Definition

Introduction

Creating an Integrated Output Section

Mass Adjustment

Defining Mass Adjustment

Adjusting the Total Mass of an Element Set to a Known Value

Redistribution of Mass to Raise the Minimum Stable Time Increment to a Target Value

Redistribution of Mass Using a Scale Factor

Nonstructural Mass Definition

Nonstructural Mass

Defining Nonstructural Mass

Distribution Definition

Distributions

Specifying the Location of a Distribution

Defining a Distribution Table

Defining Distributions by Importing Field Data from an Output Database File

Applying Distributions

Examples

Display Body Definition

What Is a Display Body?

Creating a Display Body

Using Display Bodies with Connectors

Input File Template

Assembly Definition

Introduction

Defining Parts, Part Instances, and the Assembly

Organizing the Model Definition

Rules for Defining an Assembly

Coordinate System Definitions

Limitations

Input File Template

Probability Density Function

Introduction

Applications

Probability Density Function

Truncated Probability Density Function

Output

Limitations

Input File Template

References