Source code for RCAIDE.Library.Attributes.Materials.Acrylic
# Acrylic.py
#
# Created: Jul, 2017, J. Smart
# Modified: Apr, 2018, J. Smart
#-------------------------------------------------------------------------------
# Imports
#-------------------------------------------------------------------------------
from .Solid import Solid
from RCAIDE.Framework.Core import Units
# ----------------------------------------------------------------------------------------------------------------------
# Acrylic Solid Class
# ----------------------------------------------------------------------------------------------------------------------
[docs]
class Acrylic(Solid):
"""
A class representing Polymethyl Methacrylate (PMMA/Acrylic) material properties.
Attributes
----------
ultimate_tensile_strength : float
Maximum tensile stress the material can withstand before failure in Pa (75e6)
ultimate_shear_strength : float
Maximum shear stress the material can withstand before failure in Pa (55.2e6)
ultimate_bearing_strength : float
Maximum bearing stress the material can withstand before failure in Pa (0.0)
yield_tensile_strength : float
Stress at which material begins to deform plastically in Pa (75e6)
yield_shear_strength : float
Shear stress at which material begins to deform plastically in Pa (55.2e6)
yield_bearing_strength : float
Bearing stress at which material begins to deform plastically in Pa (0.0)
minimum_gage_thickness : float
Minimum manufacturable thickness in m (3.175e-3)
density : float
Material density in kg/m³ (1180)
Notes
-----
All material properties are based on median values from manufacturer reported data.
The bearing strength values are set to zero as they are typically not relevant for acrylic applications.
**Definitions**
'Ultimate Strength'
The maximum stress that a material can withstand before failure
'Yield Strength'
The stress at which a material begins to deform plastically
References
----------
[1] MatWeb. (n.d.). Overview of materials for Acrylic, Extruded. Overview of materials for acrylic, extruded. https://www.matweb.com/search/DataSheet.aspx?MatGUID=632572aeef2a4224b5ac8fbd4f1b6f77
"""
def __defaults__(self):
"""Sets material properties at instantiation.
Assumptions:
None
Source:
N/A
Inputs:
N/A
Outputs:
N/A
Properties Used:
None
"""
self.ultimate_tensile_strength = 75e6 * Units.Pa
self.ultimate_shear_strength = 55.2e6 * Units.Pa
self.ultimate_bearing_strength = 0.0 * Units.Pa
self.yield_tensile_strength = 75e6 * Units.Pa
self.yield_shear_strength = 55.2e6 * Units.Pa
self.yield_bearing_strength = 0.0 * Units.Pa
self.minimum_gage_thickness = 3.175e-3 * Units.m
self.density = 1180. * Units['kg/(m**3)']
