... list ofdesign disciplines e.g. ship design, building design, process design, bridge design, clothing or fashion design and so on. Here we are concerned with machine design. We now define a machine ... end of this lesson, the students should have the knowledge of ã Basic concept ofdesign in general. ã Concept ofmachinedesign and their types. ã Factors to be considered in machine design. ... Discuss ‘factor of safety ‘ in view of the reliability in machine design. A.4: Reliability of a designed machine is concerned with the proper functioning of the elements and the machine as a...
... that the state of stress at a point can be given by six stress components only. It is important to understand the implication of this state of stress at a point in the designof machine elements ... and its limitations. ã Designof members subjected to combined bending, torsion and axial loading. ã Buckling of beams. 2.1.1 Introduction Stresses are developed in machine elements due ... cast iron machine parts of cross-sections shown in figure-2.1.7.2 are subjected to bending moments. Which of the two sections can carry a higher moment and determine the magnitude of the applied...
... coupling Design details of such couplings will be discussed in the next lesson. The main features of the design are essentially (a) Designof bolts (b) Designof hub (c) Overall design and ... students should have the knowledge of ã The function of couplings in machinery. ã Different types of couplings: rigid and flexible couplings. ã Types of rigid couplings such as sleeve, clamp, ... angularmisalignment 5.1.2.1.1.F- Types of misalignments in shafts 5.1.2.1.1 Sleeve coupling One of the simple type of rigid coupling is a sleeve coupling which consists of a cylindrical sleeve keyed...
... Modification of Soderberg diagram ã Estimation of material properties for helical spring ã Types of helical springs ã Design considerations for buckling and surge. 7.2.1 Designof helical ... Inner diameter of spring, . iD32mm= 3900 30040N/mm 40 10 N/m15===ìSpring rate, k Once the value of stiffness is known, then the value of number of active turns, N of the spring ... safe frequency of a helical spring? A3. Safe frequency for design should be at least 20 times less than the fundamental frequency of the spring to take care of more number of harmonics. ...
... and Gupta J.K., Text book on Machine Design, Eurasia Publishing House, New Delhi. 4. Sharma, C.S. and Purohit Kamalesh, DesignofMachine Elements, Prentice Hall of India, New Delhi, 2003. ... the limiting values of the angle of twist of a shaft? Version 2 ME , IIT Kharagpur G = shear modulus of elasticity Ip = Polar moment of inertia The limiting value of θ varies from 0.3 ... value. There are number of critical speeds depending upon number of rotating bodies. P LδSample problem Design a solid shaft of length 1m, carrying a load of 5 kN at the center and...
... the design procedure of a pressure vessel. We consider a mild steel vessel of 1m diameter comprising a 2.5 m long cylindrical section with hemispherical ends to sustain an internal pressure of ... thickness. Stresses in a spherical shell are also discussed. Basic design principle of thin cylinders are considered. Designof both welded and riveted joints for the shells are discussed. Version ... Considering the equilibrium of a cut out section the circumferential stress σθ and longitudinal stress σz can be found. Consider a section of thin cylinder of radius r, wall thickness t...
... representative values of C’s are tabulated in Table 1 below. Table 1. Values of C for various types of joints Type of joint Value of C Metal to metal joint with through bolt 0.00 – 0.10 Soft copper ... should learn: ã Designof a bolted joint with fluctuating loading ã Designof welded joints with variable loading 1. Variable loading in mechanical joints: Machine parts are often subjected ... loading: Because of many intricacies involved in designof a welded joint, codes are extensively used to design such joint when it experiences variable loading. The value of the maximum fluctuating...