Abaqus Prescribed Conditions Guide

What's New

R2022x FD01 (FP.2205)

About Prescribed Conditions

Amplitude Variations

Applying Boundary Conditions and Loads in a Local Coordinate System

Loads and Predefined Fields Available for Various Procedures

Amplitude Curves

Amplitude Curves

Defining the Time Period

Specifying Relative or Absolute Data

Defining the Amplitude Data

Defining an Actuator Amplitude via Co-Simulation

Using an Amplitude Definition with Boundary Conditions

Using an Amplitude Definition with Secondary Base Motion in Modal Dynamics

Defining Multiple Amplitude Curves

Defining a Normalized Amplitude Curve

Scaling and Shifting Amplitude Curves

Reading the Data from an Alternate File

Baseline Correction in Abaqus/Standard

Initial Conditions

Specifying Initial Conditions

Reading the Input Data from an External File

Importing Data from an Output Database File

Consistency with Kinematic Constraints

Spatial Interpolation Method

Initial Condition Types

Defining Initial Acoustic Static Pressure

Defining Initial Volume Fraction of Material

Defining Initial Normalized Concentration

Defining Initially Bonded Contact Surfaces

Defining Initial Damage Initiation

Defining the Initial Location of an Enriched Feature

Defining Initial Values of Element Solution-Dependent Variables

Defining Initial Values of Predefined Field Variables

Defining Initial Fluid Electric Potential

Defining Initial Fluid Pressure in Fluid-Filled Structures

Defining Initial Values of State Variables for Plastic Hardening

Defining Elements Initially Open for Tangential Fluid Flow

Defining Initial Ion Concentration

Defining Initial Mass Flow Rates in Forced Convection Heat Transfer Elements

Defining Initial Values of Plastic Strain

Defining Initial Pore Fluid Pressures in a Porous Medium

Defining Initial Pressure Stress in a Mass Diffusion Analysis

Defining Initial Void Ratios in a Porous Medium

Defining a Reference Mesh for Membrane Elements

Defining Initial Relative Density

Defining Initial Angular and Translational Velocity

Defining Initial Saturation for a Porous Medium

Defining Initial Solid Electric Potential

Defining the Initial Values of Solution-Dependent State Variables

Defining Initial Specific Energy for Equations of State

Defining Spud Can Embedment or Spud Can Preload

Defining Initial Stresses

Defining Elevation-Dependent (Geostatic) Initial Stresses

Defining Initial Temperatures

Defining the Initial Configuration in a One-Step Inverse Analysis

Defining Initial Velocities for Specified Degrees of Freedom

Defining Initial Volume Fractions for Eulerian Elements

Boundary Conditions

Prescribing Boundary Conditions as Model Data

Prescribing Boundary Conditions as History Data

Defining Boundary Conditions That Vary with Time

Defining Boundary Conditions through User Subroutines

Boundary Condition Propagation

Fixing Degrees of Freedom at a Point in an Abaqus/Standard Analysis

Prescribing Boundary Conditions in Linear Perturbation Steps

Submodeling

Prescribing Large Rotations

Prescribing Radial Motion on an Axisymmetric Model

Loads

About Loads

Element-Based Versus Surface-Based Distributed Loads

Varying the Magnitude of a Load

Loading during General Analysis Steps

Loading during Linear Perturbation Steps

Concentrated Loads

Concentrated Loads

Defining Time-Dependent Concentrated Loads

Modifying Concentrated Loads

Improving the Rate of Convergence in Large-Displacement Implicit Analysis

Distributed Loads

Defining Time-Dependent Distributed Loads

Modifying Distributed Loads

Improving the Rate of Convergence in Large-Displacement Implicit Analysis

Defining Distributed Loads in a User Subroutine

Specifying the Region to Which a Distributed Load Is Applied

Body Forces

Surface Tractions and Pressure Loads

Edge Tractions and Moments on Shell Elements and Line Loads on Beam Elements

References

Fluid Pressure Penetration Loads

Simulating Effects of Fluid Pressure Acting on Surfaces that Consider Contact Conditions

Surface Fluid Pressure Penetration Loading with General Contact

Pairwise Fluid Pressure Penetration Loading with Contact Pairs in Abaqus/Standard

Behavior in Linear Perturbation Steps

Output

Thermal Loads

Modeling Thermal Radiation

Prescribing Heat Fluxes Directly

Prescribing Boundary Convection

Prescribing Boundary Radiation

Electromagnetic Loads

Defining Time-Dependent Electromagnetic Loads

Modifying Electromagnetic Loads

Prescribing Electromagnetic Loads for Piezoelectric Analyses

Prescribing Electromagnetic Loads for Coupled Thermal-Electrical and Fully Coupled Thermal-Electrical-Structural Analyses

Prescribing Electromagnetic Loads for Eddy Current and/or Magnetostatic Analyses

Acoustic and Shock Loads

Specified Boundary Impedance

Radiation Boundaries for Exterior Problems

Concentrated Pressure-Conjugate Load

Incident Wave Loading due to External Sources

Pore Fluid Flow

Defining Pore Fluid Flow as a Function of the Current Pore Pressure in Consolidation Analysis

Prescribing Seepage Flow Velocity and Seepage Flow Directly in Consolidation Analysis

Prescribed Assembly Loads

Concept of an Assembly Load

Modeling an Assembly Load

Updating the Normal in a Large-Displacement Analysis

Defining Multiple Pre-Tension Sections

Use with Nodal Transformations

Applying the Prescribed Assembly Load

Display of Results

Limitations When Using Assembly Loads

Procedures

Output

Input File Template

Predefined Fields

Predefined Temperature

Predefined Field Variables

Predefined Pressure Stress

Predefined Mass Flow Rate

Specifying Uniform Predefined Temperatures and Fields

Reading Initial Values of a Field from a User-Specified Results File

Reading Initial Values of a Temperature Field from a User-Specified Output Database File

Initializing Predefined Field Variables from a User-Specified Output Database File in Abaqus/Standard

Defining Time-Dependent Fields

Field Propagation

Reading the Values of a Field Directly from an Alternate Input File

Reading the Values of a Field from a User-Specified File

Defining the Values of a Predefined Field in a User Subroutine

Defining Solution-Dependent Field Variables

Data Hierarchy

Element Type Considerations

Temperature and Field Variable Compatibility across Elements