Source code for RCAIDE.Library.Attributes.Materials.Unidirectional_Carbon_Fiber
# Unidirectional_Carbon_Fiber.py
#
# Created: Jul, 2017, J. Smart
# Modified: Apr, 2018, J. Smart
#-------------------------------------------------------------------------------
# Imports
#-------------------------------------------------------------------------------
from .Solid import Solid
from RCAIDE.Framework.Core import Units
#-------------------------------------------------------------------------------
# Uni-Directional Carbon Fiber Solid Class
#-------------------------------------------------------------------------------
[docs]
class Unidirectional_Carbon_Fiber(Solid):
"""
A class representing unidirectional carbon fiber composite material properties.
Attributes
----------
ultimate_tensile_strength : float
Maximum tensile stress before failure in Pa (1500e6)
ultimate_shear_strength : float
Maximum shear stress before failure in Pa (70e6)
ultimate_bearing_strength : float
Maximum bearing stress before failure in Pa (1500e6)
yield_tensile_strength : float
Stress at which material begins to deform plastically in Pa (1500e6)
yield_shear_strength : float
Shear stress at which material begins to deform plastically in Pa (70e6)
yield_bearing_strength : float
Bearing stress at which material begins to deform plastically in Pa (1500e6)
minimum_gage_thickness : float
Minimum manufacturable thickness in m (420e-6)
density : float
Material density in kg/m³ (1600)
Notes
-----
This class implements material properties for unidirectional carbon fiber composites.
The equal ultimate and yield strengths reflect the generally linear elastic behavior
of carbon fiber composites up to failure. Properties are based on median values from
manufacturer reported data.
**Definitions**
'Unidirectional Carbon Fiber'
A composite material where all carbon fibers are aligned in a single direction,
providing maximum strength along the fiber direction
'Ultimate Strength'
The maximum stress that a material can withstand before failure
'Yield Strength'
The stress at which a material begins to deform plastically (note: in composites,
this is often equal to ultimate strength due to brittle failure behavior)
References
----------
[1] MatWeb. (n.d.). Overview of materials for Epoxy/Carbon Fiber Composite. Overview of materials for epoxy/carbon fiber composite. https://www.matweb.com/search/datasheet.aspx?matguid=39e40851fc164b6c9bda29d798bf3726
"""
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 = 1500e6 * Units.Pa
self.ultimate_shear_strength = 70e6 * Units.Pa
self.ultimate_bearing_strength = 1500e6 * Units.Pa
self.yield_tensile_strength = 1500e6 * Units.Pa
self.yield_shear_strength = 70e6 * Units.Pa
self.yield_bearing_strength = 1500e6 * Units.Pa
self.minimum_gage_thickness = 420e-6 * Units.m
self.density = 1600. * Units['kg/(m**3)']
