SHORT QUESTION ANSWERS -SPRINGS CLASS NOTES FOR MECHANICAL ENGINEERING Spring is an important part in almost every machinery. These springs perform different functions in different applications. These absorb shocks in vehicles running on uneven roads. These store energy in toys and circuit breakers. These give cushion effect in sofas and cars. Springs are of…
INTERVIEW SHORT QUESTION ANSWERS- LOADS Loads are forces. There are different sources of forces. Weight, wind and thermal are some examples. These act differently. There are gradually, suddenly applied and impact loads. All these have different affects. 1. What are various types of forces? Two types of forces: Constant magnitude and variable magnitude….
GRADUALLY, SUDDENLY & IMPACT LOADS CLASS NOTES FOR MECHANICAL ENGINEERING Strength of a material depends on the type of load. It also depends on the manner of application of load. Apply load gradually, suddenly and with an impact. Sources of load Before studying the manner of application of load , we know various sources of…
DESIGN OF THIN PRESSURE VESSELS FOR MECHANICAL ENGINEERS Thin vessels are common to process industries. Examples of thin vessels are LPG cylinder, boiler and distillation column. Stresses are uniform in a thin shell. Radial stress is neglected as compared to hoop and longitudinal stresses. Most common material of construction is flange quality steel. These…
STRESS CONCENTRATION FACTORS CLASS NOTES FOR MECHANICAL ENGINEERING It is increase in stress due to a discontinuity in a body under loading. Discontinuities are quite common. Stress increase depends on the type and extent of a discontinuity. Stress increases due to the following discontinuities. (i) Key seat in a shaft (ii) Threads on…
SHEAR FORCE AND BENDING MOMENT DIAGRAMS CLASS NOTES Shear force and bending moment diagrams are graphical method to find their maximum values and their point of acting. Firstly, design the beam for maximum moment alone. Secondly design beam for maximum shear force. Among the two designs, larger values of beam becomes the final design….
ELLIPSE OF STRESS & STRAIN CLASS NOTES FOR MECHANICAL ENGINEERING Ellipse of stress finds resultant stress and the angle of obliquity. In 2-D, it is ellipse of stress . In 3-D it is ellipsoid of stress. Actually all bodies are 3-D. All stress systems are also 3-D. But to make study easy to understand,…
TORSION OF SHAFTS CLASS NOTES FOR MECHANICAL ENGINEERING Shafts transmit power. These are subjected to torsion and hence to shear stress. But due to self weight, weight of flywheel/pulley, shafts are subjected to bending. The shaft is in rotation, there comes reversal of stresses. It causes fatigue. Fatigue reduces the strength of shaft. Maximum failure…
MOHR’S STRESS CIRCLE CLASS NOTES FOR MECHANICAL ENGINEERING Every item in nature is under complex loading. Hence, it is under complex stresses. But a material fails in a simple manner. It may fail in simple tension/ compression/shear/strain energy/simple strain/shear strain energy. Mohr’s Stress Circle is a graphical method to determine simple stresses and strains from…
PRINCIPAL STRESSES INTRODUCTION CLASS NOTES Every object in nature is under complex loading. Hence it is under complex stresses. But failure occurs in a simple mode. It may be in simple tension, simple compression or simple shear. Hence convert complex stresses into simple stresses. Simple stresses are principal stresses. To achieve this, use analytical or…