fundamentals of machine components

... 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 ... The pressure causes external force of magnitude c pA F n = , where n= number of equally spaced bolts on the bolt circle = area of cross section of the cylinder c A p = fluid pressure ... learn: • Design of a bolted joint with fluctuating loading • Design of welded joints with variable loading 1. Variable loading in mechanical joints: Machine parts are often subjected to...

Ngày tải lên: 18/10/2013, 09:15

... What are the advantages of a belt drive? A1. The advantages of a belt drive are that, it can absorb a good amount of shock and vibration. It can take care of some degree of misalignment between ... Kamalesh, Design of Machine Elements, Prentice Hall of India, New Delhi, 2003. Version 2 ME , IIT Kharagpur 13.1.3 Nomenclature of Open Belt Drive d L - Diameter of the larger ... - Diameter of the larger pulley d S – Diameter of the smaller pulley α L - Angle of wrap of the larger pulley α S – Angle of wrap of the smaller pulley L C- Center distance between...

Ngày tải lên: 25/10/2013, 12:15

... The decision of the material to be used depends on the type of service. No. of ply and Thickness Ply is the number of layers as indicated earlier. Therefore, the number of ply is decided ... Coefficient of friction of the belt material Coefficient of friction for a pair of belt material and pulley material is provided in design data book. 13.2.4 Modification of Belt stress ... one. When angle of wrap is less than 180 0 : The maximum stress values are given for an angle of wrap is 180 ο for both the pulleys, ie, pulleys are of same diameter. Reduction of belt stress...

Ngày tải lên: 25/10/2013, 12:15

... end of this lesson, the students should be able to understand: • Features of V-belt drives • Nomenclature of V-belt, types of V-belt section and its power rating • Selection procedure of ... angle of wrap of 3.00 radian (smaller pulley herefore, incorporating the correction factors, odified power rating of a belt (kW ) = Power rating of a belt (kW) x C vw x C vl ), the angle of ... transmission falls in the lower side of the given range. Another restriction of choice of belt section arises from the view point of minimum pulley diameter. If a belt of higher thickness (higher...

Ngày tải lên: 29/10/2013, 19:15

... hydrodynamic theory of lubrication Petroff (1883) carried out extensive experimental investigation and showed the dependence of friction on viscosity of lubricant, load and dimensions of the journal ... Objectives: At the end of this lesson, the students should be able to understand: Types of bearings Comparison of bearing friction characteristics Basics of hydrodynamic theory of lubrication Design ... of test of friction ( McKee brothers ) The Fig. 14.1.5 shows the results of test of friction by McKee brothers. Figure shows a plot of variation of coefficient...

Ngày tải lên: 29/10/2013, 19:15

... 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 ... the end of this lesson, the students should have the knowledge of • Basic concept of design in general. • Concept of machine design and their types. • Factors to be considered in machine ... stage of the design a designer must ensure that the machine may be operated with ease. In many power operated machines it is simply a matter of pressing a knob or switch to start the machine. ...

Ngày tải lên: 17/12/2013, 11:15

... 1) Design of machine elements by M.F.Spotts, Prentice hall of India, 1991. 2) Machine design-an integrated approach by Robert L. Norton, Pearson Education Ltd. 3) A textbook of machine design ... and uses of some common non-ferrous metals. • Types and uses of some non-metals. • Important mechanical properties of materials. 1.2.1 Introduction Choice of materials for a machine element ... fasteners, springs etc. 1.2.8 Summary of this Lesson In this lesson the properties and uses of different types of metals and non- metals, generally used in machine design, are discussed. Primarily...

Ngày tải lên: 17/12/2013, 11:15

... or manufacture a product range. The range of operational speeds of a machine or the range of powers of a typical machine may be also as per a series of preferred numbers. Version 2 ... other, the nature of fit is dependent on the limits of tolerances and fundamental deviations of the mating parts. The nature of assembly of two mating parts is defined by three types of fit system, ... The nature of assembly of two mating parts is defined by three types of fit system, Clearance Fit, Transition Fit and Interference Fit. Clearance Fit: In this type of fit, the shaft of largest...

Ngày tải lên: 17/12/2013, 11:15

... 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 design of machine elements ... 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 ... Design of members subjected to combined bending, torsion and axial loading. • Buckling of beams. 2.1.1 Introduction Stresses are developed in machine elements due to applied load and machine...

Ngày tải lên: 17/12/2013, 11:15

... At the end of this lesson, the student should be able to understand • Elements of force system at a beam section. • Superposition of axial and bending stresses. • Transformation of plane stresses; ... section X-X, Q the first moment of area, I the moment of inertia, t the width at which transverse shear is calculated, J the polar moment of inertia and r the radius of the circular cross-section. ... any section a compressive stress of π 2 4F d and a bending stress of My I are produced. Here d is the diameter of the circular bar, I the second moment of area and the moment is PL 2 ...

Ngày tải lên: 25/12/2013, 23:18

... equation The state of strain at a point can be completely described by the six strain components and the strain components in their turns can be completely defined by the displacement components u, ... strains Consider an element AB of length δx ( figure-2.3.2.1). If displacement of end A is u, that of end B is u u x ∂ +δ ∂ x . This gives an increase in length of ( u u x ∂ +δ ∂ x -u) and therefore ... discussed. 2.3.9 Reference for Module-2 1) Mechanics of materials by E.P.Popov, Prentice hall of India, 1989. 2) Mechanics of materials by Ferdinand P. Boer, E. Russel Johnson, J.T Dewolf,...

Ngày tải lên: 25/12/2013, 23:18

... Summary of this Lesson Different types of loading and criterion for design of machine parts subjected to static loading based on different failure theories have been demonstrated. Development of ... to understand • Types of loading on machine elements and allowable stresses. • Concept of yielding and fracture. • Different theories of failure. • Construction of yield surfaces for failure ... based on a particular failure criterion. Theories of failure are essentially a set of failure criteria developed for the ease of design. In machine design an element is said to have failed...

Ngày tải lên: 25/12/2013, 23:18

... change in length of 0.2 mm. Determine the maximum stress developed in the bar. Take E= 200 GPa. 3.2.4.1F A.1: Total change in length of the bar is made up of three components ... 3.2.1.4F- Variation of theoretical stress concentration factor with r/d of a stepped shaft for different values of D/d subjected to uni-axial loading (Ref.[2]). ... figure-3.2.3.1 ‘a’ is the radius of the hole and at r=b, b>>a the stresses are not affected by the presence of the hole. Version 2 ME, IIT Kharagpur 3.2.2 Methods of reducing stress concentration...

Ngày tải lên: 25/12/2013, 23:18

... 1) Design of machine elements by M.F.Spotts, Prentice hall of India,1991. 2) Machine design-an integrated approach by Robert L. Norton, Pearson Education Ltd, 2001. 3) A textbook of machine ... However, in the presence of notches and cracks determination of total strain is difficult. 3.4.1.2F- Plots of strain amplitude vs number of stress reversals for failure. ... students should be able to understand • Design of components subjected to low cycle fatigue; concept and necessary formulations. • Design of components subjected to high cycle fatigue loading...

Ngày tải lên: 25/12/2013, 23:18

... applications. 4.1.1 Introduction: Types of fasteners A machine or a structure is made of a large number of parts and they need be joined suitably for the machine to operate satisfactorily. Parts ... the end of this lesson, the students should have the knowledge of • Fasteners and their types: permanent and detachable fasteners. • Different types of pin joints. • Different types of keys ... 4.1.2.3F- Typical use of a split pin (Ref.[6]). 4.1.3 Keys Steel keys are widely used in securing machine parts such as gears and pulleys. There is a large variety of machine keys and they...

Ngày tải lên: 25/12/2013, 23:18

Ngày tải lên: 25/12/2013, 23:18

Ngày tải lên: 25/12/2013, 23:18

Ngày tải lên: 23/01/2014, 04:20

Ngày tải lên: 23/01/2014, 04:20

Ngày tải lên: 23/01/2014, 04:20