Parallel axis theorem Definition Parallel axis theorem is to find the moment of inertia of a given cross section about a […]
Assignment:Bending stresses in a beam 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 simply […]
INTERVIEW SHORT QUESTION ANSWERS- BENDING Neutral axis of a beam Neutral axis is a line in the cross section of the beam where neutral plane cuts the cross section. At this axis, there will be no stress. It is symmetrically placed in a symmetrical cross section like a rectangular section, square section and circular […]
Mcq – 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 stress in shear (d) None (Ans: a) […]
Mcq – Bending Stresses in beams Bending occurs due to the application of (a) Axial load (b) Transverse load (c) Torsional load (d) None (Ans: b) Bending occurs due to the application of (a) Axial load (b) Lateral load (c) Torsional load (d) None (Ans: b) Bending occurs due to the application of (a) Load […]
Mcq: Beams Which is more in a beam (a) Moment of inertia (b) Polar moment of inertia (c) Section modulus (d) None (Ans: b) Centroid is applicable for a (a) 1-Dimensional (b) 2-Dimensional (c) 3-Dimensional (d) (d) None (Ans: b) Center of gravity is applicable for a (a) 1-Dimensional (b) 2-Dimensional (c) 3-Dimensional (d) None […]
Short Interview Question Answers On bending DEFINITION OF BENDING Bending is a part of a circular deformation. Initially straight member becomes like a bow or an arc. ASSUMPTIONS USED IN DERIVATION OF BENDING EQUATION (i) Beam is initially straight. (ii) Beam is homogeneous i.e. composition is same throughout. (iii) Material is continuous i.e. no voids or […]
Interview Short Question Answer -Bending Q1. A beam of square section with side ‘a’ is used with its diagonal horizontal. Find the section modulus of the beam. A. There will be one triangle above and another below the horizontal diagonal. The moment of inertia of one triangle about the base is bd3/12= a4/12. Therefore the […]
Bending Stresses PURE BENDING EQUATION M/I = σ/y = E/R Where M is the bending moment applied ( Maximum bending moment from BMD), Nm I = moment of inertia of the area about the centroidal axis, m4 σ is tensile or compressive stress at distance ‘y’ from the neural axis, MN/m2 y is the distance […]
THEORIES OF ELASTIC FAILURES There are five well known theories of elastic failures. These theories explain material under simple or complex loaded condition is elastic in many ways and does not meet a failure but undergoes a failure in one of the following five ways. The material is safe in four remaining ways. For example, […]