Advanced Computational Methods in Mechanical and Materials Engineering

Ashwani Kumar, Yatika Gori, Nitesh Dutt, Yogesh Kumar Singla, Ambrish Maurya, Ashwani Kumar, Yatika Gori, Nitesh Dutt, Yogesh Kumar Singla, Ambrish Maurya

• Publisher: CRC Press
• Year: 2021
• Print ISBN: 9781032052915
• eBook ISBN: 9781000483048
• Topic: Computer Science
• Subtopic: Mathematics General
• Index: Computer Science

This book provides in-depth knowledge to solve engineering, geometrical, mathematical, and scientific problems with the help of advanced computational methods with a focus on mechanical and materials engineering. Divided into three subsections covering design and fluids, thermal engineering and materials engineering, each chapter includes exhaustive literature review along with thorough analysis and future research scope. Major topics covered pertains to computational fluid dynamics, mechanical performance, design, and fabrication including wide range of applications in industries as automotive, aviation, electronics, nuclear and so forth.

• Covers computational methods in design and fluid dynamics with a focus on computational fluid dynamics
• Explains advanced material applications and manufacturing in labs using novel alloys and introduces properties in material
• Discusses fabrication of graphene reinforced magnesium metal matrix for orthopedic applications
• Illustrates simulation and optimization gear transmission, heat sink and heat exchangers application
• Provides unique problem-solution approach including solutions, methodology, experimental setup, and results validation

This book is aimed at researchers, graduate students in mechanical engineering, computer fluid dynamics,fluid mechanics, computer modeling, machine parts, and mechatronics.

Section C Materials Engineering

12 Viscoelastic Composites for Passive Damping of Structural Vibration

Satyajit Panda, Abhay Gupta, and Rajidi Shashidhar Reddy

Department of Mechanical Engineering, Indian Institute of Technology Guwahati, India

DOI: 10.1201/9781003202233-15

Contents

• 12.1 Introduction
  • 12.1.1 Unconstrained/Constrained Layer Damping Treatment
  • 12.1.2 Viscoelastic Composites for UCLD/CLD Treatment
• 12.2 Mathematical Modeling of CLD Treatment
• 12.3 Finite Element Formulation
• 12.4 Numerical Results and Discussion
  • 12.4.1 Properties of the Component Materials
  • 12.4.2 Damping Analysis of the Layered Plate
• 12.5 Summary
• References

12.1 Introduction

Viscoelastic materials are homogeneous and isotropic materials that exhibit an important property of energy-dissipation during time-dependent deformation. These materials are composed of long intertwined and cross-linked molecular chains where every chain contains thousands or millions of atoms. During the time-dependent deformation, the internal molecular interaction occurs, and it gives rise to the macroscopic material properties like stiffness and damping (Baz, 2019). However, the energy-dissipation property of viscoelastic materials is exploited enormously for attenuation of vibration of thin-walled structures in many engineering systems like railway wheels (Jones and Thompson, 2000), outlet guide van (Tomlinson 1990), computer hardware (Rao, 2003), machine tools (Marsh and Hale, 1998; Shi et al., 2017), spinning disks (Seubert et al., 2000), compression blades (Sun and Kari, 2010), blast protective military equipment, wind energy systems, radiofrequency antenna, biomedical devices (Herrmann et al., 2005; Birman and Kardomatea, 2018), door/floor panels, fuselage section covers of aircraft (Rao, 2003; Cunha-Filho et al., 2016), etc. In these structural applications, the commonly used viscoelastic materials are styrene-butadiene rubber (SBR), Paracril-BJ, Polymer Blend, butyl rubber, Viton-B, LD-400, Soundcoat N5, 3 M-467, etc. (Jones, 2001). However, the available literature shows different passive damping arrangements in the use of these viscoelastic materials like tuned damper, edge damping, free/unconstrained layer damping (UCLD), constrained layer damping (CLD), etc. (Grootenhuis, 1970; Nakra, 2000). Among these various passive damping arrangements, the UCLD and CLD treatments are popular ones to attenuate the bending mode of vibration of thin-walled structures. The damping mechanism in these viscoelastic damping trea...

Table of contents

• Cover
• Half Title
• Series Page
• Title Page
• Copyright Page
• Dedication
• Contents
• Introduction
• Preface
• Editors
• Acknowledgements
• Contributors
• Section A Manufacturing Engineering
• Section B Mechanical Design Engineering
• Section C Materials Engineering
• Index