Design Optimisation and Validation of Phononic Crystal Plates for Manipulation of Elastodynamic Guided Waves

Design Optimisation and Validation of Phononic Crystal Plates for Manipulation of Elastodynamic Guided Waves
Author: Saeid Hedayatrasa
Publisher: Springer
Total Pages: 240
Release: 2018-01-09
Genre: Technology & Engineering
ISBN: 3319729594

This thesis proposes novel designs of phononic crystal plates (PhPs) allowing ultra-wide controllability frequency ranges of guided waves at low frequencies, with promising structural and tunability characteristics. It reports on topology optimization of bi-material-layered (1D) PhPs allowing maximized relative bandgap width (RBW) at target filling fractions and demonstrates multiscale functionality of gradient PhPs. It also introduces a multi-objective topology optimization method for 2D porous PhPs allowing both maximized RBW and in-plane stiffness and addresses the critical role of considering stiffness in designing porous PhPs. The multi-objective topology optimization method is then expanded for designing 2D porous PhPs with deformation induced tunability. A variety of innovative designs are introduced which their maximized broadband RBW is enhanced by, is degraded by or is insensitive to external finite deformation. Not only does this book address the challenges of new topology optimization methods for computational design of phononic crystals; yet, it demonstrated the suitability and applicability of the topological designs by experimental validation. Furthermore, it offers a comprehensive review of the existing optimization-based approaches for the design of finite non-periodic acoustic metamaterial structures, acoustic metamaterial lattice structures and acoustic metamaterials under perfect periodicity.

Progress in Computational Physics (PiCP)

Progress in Computational Physics (PiCP)
Author: Matthias Ehrhardt
Publisher: Bentham Science Publishers
Total Pages: 240
Release: 2010-11-13
Genre: Science
ISBN: 1608051501

Progress in Computational Physics is a new e-book series devoted to recent research trends in computational physics. It contains chapters contributed by outstanding experts of modeling of physical problems. The series focuses on interdisciplinary computat

Vibration Engineering Exam Study Guide

Vibration Engineering Exam Study Guide
Author:
Publisher: Cybellium
Total Pages: 224
Release:
Genre: Study Aids
ISBN: 1836794479

Welcome to the forefront of knowledge with Cybellium, your trusted partner in mastering the cutting-edge fields of IT, Artificial Intelligence, Cyber Security, Business, Economics and Science. Designed for professionals, students, and enthusiasts alike, our comprehensive books empower you to stay ahead in a rapidly evolving digital world. * Expert Insights: Our books provide deep, actionable insights that bridge the gap between theory and practical application. * Up-to-Date Content: Stay current with the latest advancements, trends, and best practices in IT, Al, Cybersecurity, Business, Economics and Science. Each guide is regularly updated to reflect the newest developments and challenges. * Comprehensive Coverage: Whether you're a beginner or an advanced learner, Cybellium books cover a wide range of topics, from foundational principles to specialized knowledge, tailored to your level of expertise. Become part of a global network of learners and professionals who trust Cybellium to guide their educational journey. www.cybellium.com

Metamaterials in Topological Acoustics

Metamaterials in Topological Acoustics
Author: Sourav Banerjee
Publisher: CRC Press
Total Pages: 460
Release: 2023-10-13
Genre: Technology & Engineering
ISBN: 1000936554

As an equivalent counterpart of topological research on photonics and condensed matter physics, acoustic metamaterials create an opportunity to explore the topological behaviors in phononics and physics of programmable acoustics. This book introduces the topological behavior of acoustics through the novel design of metamaterials. It provides valuable insight into acoustic metamaterials, from multidisciplinary fundamentals to cutting-edge research. Serves as a single resource on acoustic metamaterials Covers the fundamentals of classical mechanics, quantum mechanics, and state-of-the-art condensed matter physics principles so that topological acoustics can be easily understood by engineers Introduces topological behaviors with acoustics and elastic waves through quantum analogue Hall effects, quantum spin Hall effects, and quantum valley Hall effects and their applications Explains the pros and cons of different design methods and gives guidelines for selecting specific designs of acoustic metamaterials with specific topological behaviors Includes MATLAB® code for numerical analysis of band structures This book is written for graduate students, researchers, scientists, and professionals across materials, mechanical, civil, and aerospace engineering, and those who want to enhance their understanding and commence research in metamaterials.

Current Trends and Open Problems in Computational Mechanics

Current Trends and Open Problems in Computational Mechanics
Author: Fadi Aldakheel
Publisher: Springer Nature
Total Pages: 587
Release: 2022-03-12
Genre: Science
ISBN: 3030873129

This Festschrift is dedicated to Professor Dr.-Ing. habil. Peter Wriggers on the occasion of his 70th birthday. Thanks to his high dedication to research, over the years Peter Wriggers has built an international network with renowned experts in the field of computational mechanics. This is proven by the large number of contributions from friends and collaborators as well as former PhD students from all over the world. The diversity of Peter Wriggers network is mirrored by the range of topics that are covered by this book. To name only a few, these include contact mechanics, finite & virtual element technologies, micromechanics, multiscale approaches, fracture mechanics, isogeometric analysis, stochastic methods, meshfree and particle methods. Applications of numerical simulation to specific problems, e.g. Biomechanics and Additive Manufacturing is also covered. The volume intends to present an overview of the state of the art and current trends in computational mechanics for academia and industry.

Vehicle Interior Sound Quality

Vehicle Interior Sound Quality
Author: Yansong Wang
Publisher: Springer Nature
Total Pages: 280
Release: 2022-09-07
Genre: Technology & Engineering
ISBN: 9811955794

Sound quality research is an emerging field of acoustics, and it has broad application prospects in the field of vibration and noise control of machinery and automobiles. With the development of new energy vehicles in recent years, the technology demand for interior sound quality evaluation and control has increased rapidly. This book comprehensively introduces the basic concepts, theories, methods and the latest research progress in evaluating and controlling vehicle interior sound quality. The contents include the generation mechanism of the sound field in the vehicle, the evaluation index of the sound quality, the subjective and objective evaluation method, the neural network evaluation model, the data pre-processing, the active and passive control method, the vibration control method based on the piezoelectric effect, the hybrid vibro-acoustics active control method for interior sound quality and the system of sound quality evaluation and control, etc. It contains an introduction to basic knowledge and theoretical models and a detailed description of the research background, the algorithms implementation methods and the technical status of specific issues. By reading this book, readers can fully understand the current research status and development trend of vehicle interior sound quality evaluation and control and comprehend basic concepts, related theories and implementation methods.

Discrete and Continuum Models for Complex Metamaterials

Discrete and Continuum Models for Complex Metamaterials
Author: Francesco dell'Isola
Publisher: Cambridge University Press
Total Pages: 409
Release: 2020-03-12
Genre: Science
ISBN: 1108850189

Bringing together contributions on a diverse range of topics, this text explores the relationship between discrete and continuum mechanics as a tool to model new and complex metamaterials. Providing a comprehensive bibliography and historical review of the field, it covers mechanical, acoustic and pantographic metamaterials, discusses Naive Model Theory and Lagrangian discrete models, and their applications, and presents methods for pantographic structures and variational methods for multidisciplinary modeling and computation. The relationship between discrete and continuous models is discussed from both mathematical and engineering viewpoints, making the text ideal for those interested in the foundation of mechanics and computational applications, and innovative viewpoints on the use of discrete systems to model metamaterials are presented for those who want to go deeper into the field. An ideal text for graduate students and researchers interested in continuum approaches to the study of modern materials, in mechanical engineering, civil engineering, applied mathematics, physics, and materials science.

Dynamics of Lattice Materials

Dynamics of Lattice Materials
Author: A. Srikantha Phani
Publisher: John Wiley & Sons
Total Pages: 393
Release: 2017-07-17
Genre: Technology & Engineering
ISBN: 1118729579

Provides a comprehensive introduction to the dynamic response of lattice materials, covering the fundamental theory and applications in engineering practice Offers comprehensive treatment of dynamics of lattice materials and periodic materials in general, including phononic crystals and elastic metamaterials Provides an in depth introduction to elastostatics and elastodynamics of lattice materials Covers advanced topics such as damping, nonlinearity, instability, impact and nanoscale systems Introduces contemporary concepts including pentamodes, local resonance and inertial amplification Includes chapters on fast computation and design optimization tools Topics are introduced using simple systems and generalized to more complex structures with a focus on dispersion characteristics

Fundamentals of Enriched Finite Element Methods

Fundamentals of Enriched Finite Element Methods
Author: Alejandro M. Aragón
Publisher: Elsevier
Total Pages: 312
Release: 2023-11-09
Genre: Technology & Engineering
ISBN: 0323855164

Fundamentals of Enriched Finite Element Methods provides an overview of the different enriched finite element methods, detailed instruction on their use, and also looks at their real-world applications, recommending in what situations they're best implemented. It starts with a concise background on the theory required to understand the underlying functioning principles behind enriched finite element methods before outlining detailed instruction on implementation of the techniques in standard displacement-based finite element codes. The strengths and weaknesses of each are discussed, as are computer implementation details, including a standalone generalized finite element package, written in Python. The applications of the methods to a range of scenarios, including multi-phase, fracture, multiscale, and immersed boundary (fictitious domain) problems are covered, and readers can find ready-to-use code, simulation videos, and other useful resources on the companion website to the book. - Reviews various enriched finite element methods, providing pros, cons, and scenarios forbest use - Provides step-by-step instruction on implementing these methods - Covers the theory of general and enriched finite element methods