Ch 7. Stress Analysis Multimedia Engineering Mechanics PlaneStress PrincipalStresses Mohr's Circlefor Stress Failure PressureVessels
 Chapter 1. Stress/Strain 2. Torsion 3. Beam Shr/Moment 4. Beam Stresses 5. Beam Deflections 6. Beam-Advanced 7. Stress Analysis 8. Strain Analysis 9. Columns Appendix Basic Math Units Basic Equations Sections Material Properties Structural Shapes Beam Equations Search eBooks Dynamics Statics Mechanics Fluids Thermodynamics Math Author(s): Kurt Gramoll ©Kurt Gramoll

 MECHANICS - EXAMPLE Stress Element Example What is the maximum shear stress in the stress element shown? Solution The stress state shows the normal stresses, σx and σy, to be positive (tension) but the shear stress arrows are in the negative direction. Thus, the stress state is      σx = 10.1 ksi      σy = 6.2 ksi      τxy = -3.7 ksi Rotated Stress Element The maximum shear stress is,       This could be either positive or negative due to the square root. Angle that the max shear stress acts at is,            2θτ-max = 27.79o (or -152.21 )      θp = 13.90o      τmax = 4.182 ksi @ 13.90o It is interesting to note, the new normal stresses are,           σx' = σy' = (σx+ σy)/2 = 8.15 ksi

Practice Homework and Test problems now available in the 'Eng Mechanics' mobile app
Includes over 400 problems with complete detailed solutions.
Available now at the Google Play Store and Apple App Store.