MOMENT OF INERTIA (I) AND POLAR MOMENT OF INERTIA (J) It is a property of a cross-sectional area to resist bending. Larger is the value of moment of inertia, lesser will be the bending. It is also called second moment of the area of cross-section. Its symbol is ‘I’. Its units are mm4. Therefore wherever […]
CALCULATION OF MOMENT OF INERTIA OF A UNSYMMETRICAL CROSS SECTION USING PARALLEL AXIS THEOREM Using Varignon theorem (Moment of the resultant about a certain point is equal to the algebraic sum of moments of the individual forces about the same point). A y— = A1y1 +A2y2+A3y3+A4Y4 For the area shown in Fig1, ALL THE DISTANCES […]
SOM ASSIGNMENT BENDING STRESSES IN BEAMS A 4 m span wooden beam of rectangular section 120 mm deep and 60 mm wide is bent into an arc of radius 100 m. Determine the following quantities: Maximum tensile stress developed Maximum compressive stress developed Bending moment applied. Point load at the centre if the beam is […]
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 […]
SOM—INTERVIEW SHORT QUESTION ANSWERS ON STRENGTH OF MATERIALS – –deflection, torque, ratio of maximum bending and shear stress, difference between Neutral layer and neutral axis, difference between torsional rigidity and lateral rigidity If the deflection at the free end of a cantilever of rectangular cross—section due to certain loading is 0.8 cm, find the […]
S O M MECHANICAL ENGINEERING — INTERVIEW SHORT QUESTION ANSWERS ON STRENGTH OF MATERIALS — 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 What is section modulus? It is the ratio of moment of inertia to the maximum distance of outermost […]
S O M — INTERVIEW SHORT QUESTION ANSWERS —Macaulay’s method, bending moment at the point of shear force changes sign, shear force and bending moment, assumptions in simple bending Why is Macaulay’s method superior to double Integration method? A. Double integration method is applicable for one load only at one time. If number of loads […]
S O M MECHANICAL ENGINEERING M C Q INTERVIEW SHORT QUESTION ANSWERS ON STRENGTH OF MATERIALS –Question Answers–Neutral axis, equivalent length 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, composition and application of springs Neutral axis of a beam. It is a […]
Multiple Choice Questions (mcq) on Strength of Materials – Theories of Elastic Failure Maximum principal stress theory is applicable to (a) Ductile materials (b) Brittle materials (c) Composite materials (d) None (Ans:b) Under maximum principal stress theory, maximum principal stress is equal to (a) Allowable stress in tension (b) Allowable stress in compression (c) Allowable […]
Multiple Choice Questions (mcq) on Strength of materials – Bending Stresses — 3 Higher bending stiffness stands for (a) Less twist (b) Less distortion (c) More bending (d) None (Ans: d) Section modulus of a beam is (a) I/y (b) I/ymax (c) I/d (d) None (Ans: b) The symbol used for section modulus is (a) […]