SOM ASSIGNMENT PRINCIPAL STRESSES/COMPLEX STRESSES At a point in an elastic material under strain, the stresses on three mutually perpendicular planes are follows: A normal tensile stress of 60 N/mm2 and a shear stress of 40 N/mm2 on one plane, a normal compressive stress of 40 N/mm2 and a complementary shear stress of 40 N/mm2 […]
Multiple Choice Questions (mcq) on Strength of Materials – Principal stresses, Principal planes and Principal strains — 2 Mohr’ s circle is a graphical method to find (e) Bending stresses (f) Principal stresses (g) Torsional shear stresses (h) None (ANs: b) Mohr’s stress circle method is used to analyze a body under (a) Complex stresses […]
Multiple Choice Questions (mcq) on Strength of Materials – Principal stresses, Principal planes and Principal strains-1 A principal plane is a plane of (a) Zero tensile stress (b) Zero compressive stress (c) Zero shear stress (d) None (Ans: c) A principal plane is a plane of (a) Only normal stress (b) Only shear stress (c) Only […]
S O M Short Interview Question Answer on Principal stresses and Strains Q. What is angle of obliquity? A. Any plane is to be under complex stress if it has a normal and shear stress simultaneously. Then there will be a resultant stress. The angle between the resultant and normal stress is called the angle […]
S O M — Short Interview Question Answers on Bending Stress, Torsional Stress, Buckling Stress and Complex Stress 11. What is a bending stress? What is its symbol? What are its units? Bending stress is caused due to load perpendicular to the length (lateral load) in a beam. Bending of beams causes both tensile and […]
COMPOUND STRESS/COMPLEX STRESS SYSTEM When normal and shear stresses act simultaneously on an area (plane), it is called a complex or compound stress system. It will happen when the force is inclined to an area. The inclined force can be resolved into normal and tangential components.Normal component will cause normal stress and tangential component will […]
HOW TO FIND THE VARIOUS QUANTIES FROM MOHR’S CIRCLE (i) To find principal stresses σ1 and σ2—–points of zero shear stress Mark two extreme ends on the horizontal diameter as S and R. These are the points of zero shear stress. Therefore measure OS = σ1 […]
S O M MECHANICAL ENGINEERING -Ellipse of Strain–2–Dimensional ELLIPSE OF STRAIN It is the locus of the resultant strain on the infinite inclined planes within a body under principle strains. It is a graphical method to find the resultant strain and the angle of obliquity on a given inclined plane (with the plane of major […]
S O M MECHANICAL ENGINEERING -ELLIPSE OF STRESS –2 Dimensinal Introduction In 2-D it is called ellipse of stress . In 3 D it is called ellipsoid of stress. Actually all bodies are 3-D. All stress systems are also 3-D. But to make study easy to understand, first 2-D stress system is studied. The state […]
SOM–Principal Stresses and Principal Planes–4(a)–Mohr’s Stress Circle Method or Graphical Method GRAPHICAL METHOD: MOHR’S STRESS CIRCLE METHOD We know σθ = (σx + σy)/2 + ((σx — σy)/2) (Cos2θ) + τ Sin2θ τθ = (( σx — σy)/2) (Sin2θ) — τ Cos2θ Square and add, we get the equation of a circle as given below. [σθ – (σx — σy)/2)]2 +τ2 = […]