click below

click below

Normal Size Small Size show me how

# MEE 427 Test 1

Term | Definition |
---|---|

Normal Stress (sigma) equals what? | P/A (force over cross sectional area) |

engineering strain equals what? | deflection over length |

strength is proportional to what? | strain |

strength equation | strength = E * strain |

shear stress is proportional to what? | strain angle |

shear stress eqn | tau = (modulus of rigidity (G))*shear angle |

deflection eqn | PL/AE |

v is called what? | poisson's ratio |

v eqn | -(transverse strain)/(longitudinal strain) |

v is typically what for steels? | 0.30 |

Eqn relating E to G and v | E = 2G(1+v) |

If given E and v, which values can be found? | Strain, principal stresses |

Principal stress eqn | (sigma)1 = (E(strain1 + v*strain2))/(1-v^2) (sigma)2 = (E(strain2 + v*strain1))/(1-v^2) |

Bending stress eqn | sigma = (Mc)/I |

c is distance from what? | neutral axis |

I for round xc eqn | I = (pi*d^4)/64 |

bending stress for circular xc eqn | 32M/(pi*d^3) |

how do you find the moment of inertia for a hollow beam? | Same equation, but subtract the inside diameter eqn from the outside diameter eqn |

k = ? | di/do |

converting torque to lb*in | 63000*HP/(RPM) |

converting torque to lb*ft | 5252*HP/(RPM) |

converting torque to N*m | 9549*kW/(RPM) |

shear stress eqn | tau = T*rho/(J) = (16T)/(pi*d^3) |