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Ch1_Stress - Stress EMCH213 Important Concepts Equilibrium...

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Stress EMCH213
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Important Concepts Equilibrium Internal Loadings Average Normal Stress: Average Shear Stress:   Allowable Stress: 
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Recall: Types of external loadings: Surface forces are caused by direct contact on a  body’s surface Can result in concentrated forces, acting only on one  point Or can be idealized as linear distributed loadings [units:  N/m] Body forces act without physical contact (like  gravity) A support exerts: A force if it prevents translation A moment if it prevents rotation Recall the Right  hand Rule 1 :
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Internal Loadings Internal resultant loadings hold a body,  subjected to external loads, together Use equations of equilibrium to  determine resultant force, F R and moment M Ro  at the  centroid of a sectioned area  If forces act in same plane, three types of  loading result: Normal Force, N Shear Force, V Bending Moment, M
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Ch1_Stress - Stress EMCH213 Important Concepts Equilibrium...

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