JNTUK R20 3-1 DMM-1 Material/Notes PDF Download
Students those who are studying JNTUK R20 Mechanical Branch, Can Download Unit wise R20 3-1 Design of Machine Members-I (DMM-I) Material/Notes PDFs below.
JNTUK R20 3-1 DMM-1 Material/Notes PDF Download
OBJECTIVES:
- To understand the materials and their properties along with manufacturing considerations.
- To gain knowledge about the strength of machine elements.
- To understand and apply the knowledge in designing the riveted and welded joints, keys, cotters and knuckle joints.
- To understand and apply the knowledge in designing the shafts and shaft couplings.
- To understand and apply the knowledge in designing the mechanical springs.
UNIT-1
INTRODUCTION: General considerations in the design of Engineering Materials and their properties – selection –Manufacturing consideration in design–BIS codes of steels.
STRESSES IN MACHINE MEMBERS: Simple stresses – combined stresses – torsional and bending stresses – impact stresses – stress strain relation – various theories of failure – factor of safety – design for strength and rigidity – preferred numbers. the concept of stiffness in tension, bending, torsion and combined situations – static strength design based on fracture toughness.
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UNIT-2
STRENGTH OF MACHINE ELEMENTS: Stress concentration – theoretical stress concentration factor – fatigue stress concentration factor notch sensitivity – design for fluctuating stresses – endurance limit – estimation of endurance strength – goodman’s line – soderberg’s line – modified goodman’s line, Gerber’s parabola.
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UNIT-3
RIVETED AND WELDED JOINTS – design of joints with initial stresses – eccentric loading.
Bolted joints – design of bolts with pre-stresses – design of joints under eccentric loading – locking devices – bolts of uniform strength.
KEYS, COTTERS AND KNUCKLE JOINTS: Design of keys-stresses in keys-cotter joints-spigot and socket, sleeve and cotter, jib and cotter joints- knuckle joints.
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UNIT-4
SHAFTS: Design of solid and hollow shafts for strength and rigidity – design of shafts for combined bending and axial loads – shaft sizes – BIS code- Use of internal and external circlips- gaskets and seals (stationary & rotary).
SHAFT COUPLING: Rigid couplings – muff, split muff and flange couplings, flexible couplings – flange coupling (modified).
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UNIT-5
MECHANICAL SPRINGS: Stresses and deflections of helical springs – extension -compression springs – springs for fatigue loading, energy storage capacity – helical torsion springs – co-axial springs, leaf springs.
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Note: Design data book is NOT Permitted in the examination
TEXT BOOKS:
- Machine design / NC Pandya & CS Shah/Charotar Publishing House Pvt. Limited
- Machine Design/V.B.Bhandari/ McGraw-Hill Education
REFERENCE BOOKS:
- Design of Machine Elements / V.M. Faires/McMillan
- Machine design / Schaum Series/McGraw-Hill Professional
- Machine Design/ Shigley, J.E/McGraw Hill.
- Design data handbook/ K.Mahadevan & K. Balaveera Reddy/ CBS publishers.
- Machine Design –Norton/ Pearson publishers
OUTCOMES:
- CO1: Judge about materials and their properties along with manufacturing considerations.
- CO2: Gain knowledge about the strength of machine elements.
- CO3: Apply the knowledge in designing the riveted and welded joints, keys, cotters and knuckle joints.
- CO4: Apply the knowledge in designing the shafts and shaft couplings.
- CO5: Apply the knowledge in designing the mechanical springs.
