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60 lines
1.6 KiB
Python
60 lines
1.6 KiB
Python
from __future__ import annotations
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"""
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Shear stress is a component of stress that is coplanar to the material cross-section.
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It arises due to a shear force, the component of the force vector parallel to the
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material cross-section.
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https://en.wikipedia.org/wiki/Shear_stress
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"""
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def shear_stress(
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stress: float,
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tangential_force: float,
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area: float,
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) -> tuple[str, float]:
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"""
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This function can calculate any one of the three -
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1. Shear Stress
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2. Tangential Force
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3. Cross-sectional Area
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This is calculated from the other two provided values
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Examples -
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>>> shear_stress(stress=25, tangential_force=100, area=0)
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('area', 4.0)
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>>> shear_stress(stress=0, tangential_force=1600, area=200)
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('stress', 8.0)
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>>> shear_stress(stress=1000, tangential_force=0, area=1200)
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('tangential_force', 1200000)
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"""
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if (stress, tangential_force, area).count(0) != 1:
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raise ValueError("You cannot supply more or less than 2 values")
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elif stress < 0:
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raise ValueError("Stress cannot be negative")
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elif tangential_force < 0:
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raise ValueError("Tangential Force cannot be negative")
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elif area < 0:
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raise ValueError("Area cannot be negative")
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elif stress == 0:
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return (
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"stress",
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tangential_force / area,
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)
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elif tangential_force == 0:
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return (
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"tangential_force",
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stress * area,
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)
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else:
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return (
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"area",
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tangential_force / stress,
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)
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if __name__ == "__main__":
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import doctest
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doctest.testmod()
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