Simple stresses and simple strains-Assignment Determine the diameter of a short rod to carry a compressive load of 2800 N, such that the percentage contraction and compressive stress do not exceed 0.01 and 30 N/mm2 . Given E = 200 GN/m2. Find the followings: decrease in length if the original length is 10 cm. changed length. […]
SIMPLE STRESSES AND SIMPLE STRAINS-FORMULAS Quantity Equation Units Nature Tensile stress, at σt=Ft/A N/mm2 + strain Tensile , εt εt =dl/l No units + modulus Tensile , E E = σt /εt GN/m2 Comp. stress, σc σc=Fc /A N/mm2 — strain Comp. , εc εc= –dl/l No units — modulus Comp, E E = […]
INTERVIEW SHORT QUESTION ANSWERS -Simple stresses and strains-1 Q1. Write the relationship between true strain and conventional strain as well as relationship between true stress and conventional stress. A. When a tensile load is applied to a ductile material, its length increases and area of cross section decreases. When load is applied beyond a certain limit, […]
INTERVIEW SHORT QUESTION ANSWERS–Simple stresses-2 Q1. What is meant by SOM? One material has different strengths under various types of loads. For example: concrete has strength in compression as 30 N/mm2. In tension, it has strength of 3 N/mm2. It is better to use concrete under a compressive load and NOT under a tensile load. […]
Mcq: Stresses and strains in composite sections Stresses in a composite section of two materials will be (a) Load in one material/area of that material (b) Load in second material/area of first material (c) Load in one material/area of second material (d) None (Ans: a) Strains in a composite job of two materials will be (a) […]
Short Interview Question Answers on simple stresses What is meant by Strength of Materials? This subject tells which materials are strong in tension/compression/bending/torsion/buckling loads. Hence depending upon the application, one can select the material for that application. Application includes chair, table, rod, shaft or any item one can think of. The selection is possible after […]
Elastic Constants and Simple Strains Poisson’s Ratio and Modulus are elastic constants. These constants have constant value for various materials. These are applicable only within elastic limits. Therefore, these are called elastic constants. Modulus Ratio of stress to strain is called modulus. These are of three types. (i) Young’s modulus (Tension) = E = tensile stress/ tensile […]
SIMPLE STRESSES Stress: It is the internal resistance of a material against the external force applied. Since it is an internal resistance,it is invisible. Mathematically stress = force/area =N/mm 2. The definition of Simple stress is that it is due to only one type of load applied. The Simple tensile stress when only tensile load is […]
BENDING STRESSES & STRAINS IN COMPOSITE BEAMS DEFINITION OF A COMPOSITE BEAM A beam of two or more materials is a composite beam. STRESSES AND STRAINS IN COMPOSITE BEAMS Derivation of bending equation assumes the material is homogeneous and isotropic.Thus, a composite beam does not satisfy this assumption. Therefore, a composite beam is converted into a […]