Structural Drafting Shear stress in Bolts. Fastener Loads and Stresses Load:External force applied to a member. Stress: Internal force acting on a member.

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Presentation transcript:

Structural Drafting Shear stress in Bolts

Fastener Loads and Stresses Load:External force applied to a member. Stress: Internal force acting on a member. Strain: Change in size or shape of a material caused by stress.

Shear stress in Bolts Types of Stress: Axial tensile stress Axial compressive stress Shear stress Bending stress Bearing stress Web crippling compressive stress

Shear stress in Bolts General Stress Equation: Allowable Stress (lbs/in 2 ) = (load (lbs))/(cross sectional area (in 2 )) Allowable Stress =P/A Structural Equation (single shear): F v = r v /a b F v = allowable shear strength (kips/ in 2 ) r v = allowable shear value (kips) a b = cross sectional area of shear plane of bolt (in 2 )

Shear stress in Bolts General Stress Equation: Allowable Stress (lbs/in 2 ) = (load (lbs))/(cross sectional area (in 2 )) Allowable Stress =P/A Structural Equation (double shear): F v = r v / 2(a b) ) F v = allowable shear strength (kips/ in 2 ) r v = allowable shear value (kips) a b = cross sectional area of shear plane of bolt (in 2 )

Shear stress in Bolts Single Shear: Bolts stressed on one transverse section Structural Equation (single shear): F v = r v /a b F v = allowable shear strength (kips/ in 2 ) r v = allowable shear value (kips) a b = cross sectional area of shear plane of bolt (in 2 )

Shear stress in Bolts Double Shear: Bolts stressed on two transverse sections Structural Equation (double shear): F v = r v / 2(a b )) F v = allowable shear strength (kips/ in 2 ) r v = allowable shear value (kips) a b = cross sectional area of shear plane of bolt (in 2 )

Shear stress in Bolts (Table 7-1)