# SolidFixedCondition

SolidFixedCondition[pred,vars,pars]

represents a fully constrained solid boundary for PDEs with predicate pred indicating where it applies, with model variables vars and global parameters pars.

# Details

• SolidFixedCondition specifies a boundary condition for SolidMechanicsPDEComponent.
• SolidFixedCondition is also known as a fixed support boundary condition.
• SolidFixedCondition is typically used to fully constrain the movement of a solid boundary. Common examples include a beam that is fixed to a wall at one side.
• SolidFixedCondition constrains the movement of a solid with dependent variables , and , independent variables and time variable .
• Stationary variables vars are vars={{u[x1,,xn],v[x1,,xn],},{x1,,xn}}.
• Time-dependent variables vars are vars={{u[t,x1,,xn],v[t,x1,,xn],},t,{x1,,xn}}.
• Frequency-dependent variables vars are vars={{u[x1,,xn],v[x1,,xn],},ω,{x1,,xn}}.
• The fixed constraint SolidFixedCondition models , and .
• SolidFixedCondition is a special case of SolidDisplacementCondition where the displacements are set to 0.
• Model parameters pars are specified as for SolidMechanicsPDEComponent.
• A fixed condition boundary can be used with:
•  analysis type applicable Transient Yes Frequency Response Yes Eigenfrequency Yes Stationary Yes
• SolidFixedCondition evaluates to a DirichletCondition.
• The boundary predicate pred can be specified as in DirichletCondition.
• If the SolidFixedCondition depends on parameters that are specified in the association pars as ,keypi,pivi,, the parameters are replaced with .

# Examples

open allclose all

## Basic Examples(1)

Compute the deflection of a spoon held fixed at the end and with a force applied at the top. Set up variables and parameters:

Set up the PDE and the geometry:

Visualize the displacement:

## Properties & Relations(2)

SolidFixedCondition evaluates to DirichletCondition:

SolidFixedCondition is a special case of SolidDisplacementCondition. Set up variables and parameters:

Create a fixed constraint:

This is the same as a displacement condition with 0 displacement:

Wolfram Research (2021), SolidFixedCondition, Wolfram Language function, https://reference.wolfram.com/language/ref/SolidFixedCondition.html.

#### Text

Wolfram Research (2021), SolidFixedCondition, Wolfram Language function, https://reference.wolfram.com/language/ref/SolidFixedCondition.html.

#### CMS

Wolfram Language. 2021. "SolidFixedCondition." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/SolidFixedCondition.html.

#### APA

Wolfram Language. (2021). SolidFixedCondition. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/SolidFixedCondition.html

#### BibTeX

@misc{reference.wolfram_2024_solidfixedcondition, author="Wolfram Research", title="{SolidFixedCondition}", year="2021", howpublished="\url{https://reference.wolfram.com/language/ref/SolidFixedCondition.html}", note=[Accessed: 20-June-2024 ]}

#### BibLaTeX

@online{reference.wolfram_2024_solidfixedcondition, organization={Wolfram Research}, title={SolidFixedCondition}, year={2021}, url={https://reference.wolfram.com/language/ref/SolidFixedCondition.html}, note=[Accessed: 20-June-2024 ]}