Mechanical Properties–SHEET 2–Brittleness, Creep, Fatigue, Hardness, Malleability, Plasticity Brittleness A brittle material shows no deformation under any type of load. If the load is creased it will fail suddenly. Normally these materials fail due to small impact (moving) force. It has only one strength i.e. Ultimate strength. Brittle materials are cast iron, stone, brick etc. […]
MECHANICAL PROPERTIES–SHEET 1 –Ductility, Elasticity, Resilience, Yield strength. Stiffness, Toughness Materials/machines/structures are subjected to forces of one kind or the other or combined forces. How the materials behave under these forces is explained in terms of mechanical properties. These mechanical properties are measured by various destructive tests. Various worth mentioning mechanical properties are Ductility, Elasticity, […]
INTERVIEW SHORT QUESTION ANSWERS ON STRENGTH OF MATERIALS – Numerical problems on (Second moment of inertia, elongation due to self weight and external load, Section modulus, Deflection at free end of a cantilever, Ratio of torsional moments of solid and hollow shafts, ratio of maximum bending and shear stresses in a shaft under M and […]
INTERVIEW SHORT QUESTION ANSWERS ON STRENGTH OF MATERIALS – –deflection at the free end of a cantilever, torsional moments of resistance of a solid circular shaft of diameter ‘D’ and a hollow circular shaft having external diameter ‘D’ and internal diameter ‘d’, ratio of maximum bending stress to the maximum shear stress for a solid shaft […]
INTERVIEW SHORT QUESTION ANSWERS ON STRENGTH OF MATERIALS – —true strain and conventional strain and relation between these, sudden load and impact load, Numerical problems on (Second moment of inertia, elongation due to self weight and external load, Section modulus Write the relationship between true strain and conventional strain as well as relationship between true stress and […]
INTERVIEW SHORT QUESTION ANSWERS ON STRENGTH OF MATERIALS –Question Answers–factor of safety, flexural rigidity, ductility, hoop stress, Hook’s Law, Why is the true stress strain diagram above the conventional stress strain diagram and compressive true stress strain diagram is below the conventional stress strain diagram, true stress and nominal stress What is factor of safety? A. FACTOR OF SAFETY Need […]
INTERVIEW SHORT QUESTION ANSWERS ON STRENGTH OF MATERIALS –Question Answers–slenderness ratio, section modulus, relation between Young’s modulus and modulus of rigidity, 0.2 % proof stress, perpendicular axis theorem, Differentiate between a shaft and a beam Q Define slenderness ratio. A. It is used in columns and struts. It is defined as the ratio of equivalent length Le and the […]
INTERVIEW SHORT QUESTION ANSWERS ON STRENGTH OF MATERIALS –Question Answers–Macaulay’s method, Poisson’s ratio, Compare thin and thick cylinder, bending moment at the point of shear force changes sign, Define shear force and bending moment, assumptions made in the theory of simple bending Why is Macaulay’s method superior to double Integration method? A. Double integration method is […]
INTERVIEW SHORT QUESTION ANSWERS ON STRENGTH OF MATERIALS –Question Answers–Neutral axis, equivalent of a column, thermal stresses, principal planes, point of Contra-flexure, parallel axis theorem, Compare hollow and solid shaft, difference between Close coiled and Open coiled springs Define neutral axis of a beam. It is a line in the cross section of the beam where neutral plane cuts the […]
Difference between Metals and Non-Metals Sr. No. Metals Non-Metals 1. Metals are solid at room temperature. Mercury is an exception. Non-Metals are solids, liquids and gases at room temperature. 2. These are malleable i.e. These can be changed into thin sheets under a compressive load. Non metals are not malleable. These get crushed under a […]