Hysteresis of Composites

Hysteresis of Composites
Author: Li Longbiao
Publisher: BoD – Books on Demand
Total Pages: 178
Release: 2019-12-11
Genre: Technology & Engineering
ISBN: 1789846196

This book introduces the hysteresis and damping of, and damage to, composites. It analyzes the following areas: damage mechanisms affecting the hysteresis of composites, mechanical hysteresis of ceramic-matrix composites, hysteresis behavior of fiber-reinforced ceramic-matrix composites (CMCs), relationship between the internal damage and hysteresis loops of CMCs, and mechanical hysteresis loops and the fiber/matrix interface frictional coefficient of SiC/CAS and C/SiC composites. A damping study on aluminum-multiwalled carbon nanotube-based nanocomposite materials is discussed to increase the damping property for applications like engine heads, pistons, cylinder blocks, and other aerospace components. The effect of ceramic/graphite addition to the dry sliding wear behavior of copper-based hybrid composites has been assessed at three different normal loads of 9.81, 19.62, and 29.34 N. The authors hope this book will help material scientists and engineering designers to understand and master the hysteresis of composites.

Durability of Ceramic-Matrix Composites

Durability of Ceramic-Matrix Composites
Author: Longbiao Li
Publisher: Woodhead Publishing
Total Pages: 480
Release: 2020-02-07
Genre: Technology & Engineering
ISBN: 0081030223

Durability of Ceramic-Matrix Composites presents the latest information on these high-temperature structural materials and their outstanding advantages over more conventional materials, including their high specific strength, high specific modulus, high temperature resistance and good thermal stability. The critical nature of the application of these advanced materials makes it necessary to have a complete understanding of their characterization. This book focuses explicitly on the durability of CMCs and will be extremely valuable for materials scientists and engineers who are dealing with the simulation of durability response and fatigue of ceramic matrix composites. - Provides the latest theoretical and applied research in the field of ceramic matrix composites, particularly as it relates to usage in aerospace propulsion systems - Presents extensive information on the micromechanics of damage evolution, lifetime prediction and durability in ceramic matrix composites - Details parameter studies that are valuable for materials development and lifetime durability studies

Energy Dissipation in Composite Materials

Energy Dissipation in Composite Materials
Author: Peter A. Zinoviev
Publisher: CRC Press
Total Pages: 268
Release: 1994-04-19
Genre: Technology & Engineering
ISBN: 9781566760829

This book deals with damping or energy dissipation processes in vibrating solids. It includes information on the methods of approach to describing energy dissipation processes in materials. The book contains basic results which describe the dissipative response of anisotropic bodies and composites.

Thermomechanical Fatigue of Ceramic-Matrix Composites

Thermomechanical Fatigue of Ceramic-Matrix Composites
Author: Longbiao Li
Publisher: John Wiley & Sons
Total Pages: 494
Release: 2019-07-30
Genre: Technology & Engineering
ISBN: 3527822593

Guides researchers and practitioners toward developing highly reliable ceramic-matrix composites The book systematically introduces the thermomechanical fatigue behavior of fiber-reinforced ceramic-matrix composites (CMCs) and environmental barrier coatings, including cyclic loading/unloading tensile behavior, cyclic fatigue behavior, dwell-fatigue behavior, thermomechanical fatigue behavior, and interface degradation behavior. It discusses experimental verification of CMCs and explains how to determine the thermomechanical properties. It also presents damage evolution models, lifetime prediction methods, and interface degradation rules. Thermomechanical Fatigue of Ceramic-Matrix Composites offers chapters covering unidirectional ceramic-matrix composites and cross-ply and 2D woven ceramic-matrix composites. For cyclic fatigue behavior of CMCs, it looks at the effects of fiber volume fraction, fatigue peak stress, fatigue stress ratio, matrix crack spacing, matrix crack mode, and woven structure on fatigue damage evolution. Both the Dwell-fatigue damage evolution and lifetime predictions models are introduced in the next chapter. Experimental comparisons of the cross-ply SiC/MAS composite, 2D SiC/SiC composite, and 2D NextelTM 720/Alumina composite are also included. Remaining sections examine: thermomechanical fatigue hysteresis loops; in-phase thermomechanical fatigue damage; out-of-phase thermomechanical fatigue; interface degradation models; and much more. -Offers unique content dedicated to thermomechanical fatigue behavior of ceramic-matrix composites (CMCs) and environmental barrier coatings -Features comprehensive data tables and experimental verifications -Covers a highly application-oriented subject?CMCs are being increasingly utilized in jet engines, industrial turbines, and exhaust systems Thermomechanical Fatigue of Ceramic-Matrix Composites is an excellent book for developers and users of CMCs, as well as organizations involved in evaluation and characterization of CMCs. It will appeal to materials scientists, construction engineers, process engineers, and mechanical engineers.

Time-Dependent Mechanical Behavior of Ceramic-Matrix Composites at Elevated Temperatures

Time-Dependent Mechanical Behavior of Ceramic-Matrix Composites at Elevated Temperatures
Author: Longbiao Li
Publisher: Springer Nature
Total Pages: 373
Release: 2020-04-18
Genre: Technology & Engineering
ISBN: 9811532745

This book investigates the time-dependent behavior of fiber-reinforced ceramic-matrix composites (CMCs) at elevated temperatures. The author combines the time-dependent damage mechanisms of interface and fiber oxidation and fracture with the micromechanical approach to establish the relationships between the first matrix cracking stress, matrix multiple cracking evolution, tensile strength, tensile stress-strain curves and tensile fatigue of fiber-reinforced CMCs and time. Then, using damage models of energy balance, the fracture mechanics approach, critical matrix strain energy criterion, Global Load Sharing criterion, and hysteresis loops he determines the first matrix cracking stress, interface debonded length, matrix cracking density, fibers failure probability, tensile strength, tensile stress-strain curves and fatigue hysteresis loops. Lastly, he predicts the time-dependent mechanical behavior of different fiber-reinforced CMCs, i.e., C/SiC and SiC/SiC, using the developed approaches, in order to reduce the failure risk during the operation of aero engines. The book is intended for undergraduate and graduate students who are interested in the mechanical behavior of CMCs, researchers investigating the damage evolution of CMCs at elevated temperatures, and designers responsible for hot-section CMC components in aero engines.

Nonlinear Behavior of Ceramic-Matrix Composites

Nonlinear Behavior of Ceramic-Matrix Composites
Author: Longbiao Li
Publisher: Woodhead Publishing
Total Pages: 252
Release: 2021-08-17
Genre: Technology & Engineering
ISBN: 0323858171

Nonlinear Damage Behavior of Ceramic Matrix Composites help readers [researchers, material scientists and design engineers] gain greater understanding on the damage mechanisms inside CMCs so they can better design components used in aeronautics and astronautics. Key areas addressed in the book include: the nonlinear damage behavior of ceramic-matrix composites, including damage mechanisms and models, nonlinear damage behavior of ceramic-matrix composites under tensile and fatigue loading, strain-rate dependent, stochastic loading dependent, and time dependent nonlinear damage behavior, and the effect of pre-exposure and thermal fatigue on non-linear damage behavior of ceramic-matrix composites. - Provides comprehensive coverage on damage mechanisms and models under tensile and cyclic fatigue loading which ultimately control nonlinear behavior - Covers nonlinear damage analyses of CMC components and experimental observations of damage evolution - Presents extensive knowledge on fracture mechanic principles used in the design of aerospace propulsion systems

Composites Evaluation

Composites Evaluation
Author: J. Herriot
Publisher: Butterworth-Heinemann
Total Pages: 242
Release: 2015-12-04
Genre: Technology & Engineering
ISBN: 1483140474

Composites Evaluation contains the proceedings of the Second International Conference on Testing, Evaluation and Quality Control of Composites-TEQC 87, held at the University of Surrey, UK on September 22-24, 1987. The papers review the physical and chemical properties of composites and the testing and evaluation of these materials. This monograph is comprised of 29 chapters split into nine sections, organized around the themes of nondestructive testing, fatigue testing, impact testing, processing-property relationships, acoustic emission, fracture, mechanical tests, and specialized test equipment and assessment of in-service behavior. The first chapter deals with the nondestructive testing of welds in continuous carbon fiber reinforced thermoplastics, while the second focuses on the use of an automated coin-tap technique for the nondestructive testing of composite structures. The chapters that follow explore hysteresis measurement for obtaining characteristic quantities during dynamic fatigue; real-time recording of impact experiments on composite laminates; the use of statistical methods for determining design data for advanced composite materials; and the strain dependence of elastic modulus in unidirectional composites. The final chapter describes a methodical approach for studying and predicting polymer fiber composite serviceability influenced by cold climate factors. This text will appeal to mechanical and structural engineers as well as materials scientists and technologists.

Carbon-Based Conductive Polymer Composites

Carbon-Based Conductive Polymer Composites
Author: Dong Xiang
Publisher: CRC Press
Total Pages: 177
Release: 2023-02-10
Genre: Technology & Engineering
ISBN: 100083123X

Carbon nanomaterials can transfer their excellent electrical conductivity to polymers while enhancing or maintaining their original mechanical properties. Conductive polymer composites based on carbon nanomaterials are finding increasing applications in aerospace, automotive, and electronic industries when flexibility or lightweight is required. Carbon-Based Conductive Polymer Composites: Processing, Properties, and Applications in Flexible Strain Sensors summarizes recent remarkable achievements in the processing–structure–property relationship of conductive polymer composites based on carbon nanomaterials. It also discusses research developments for their application in flexible strain sensors and novel processing methods like additive manufacturing. Presents the state of the art in conductive composite materials and their application in flexible strain sensors. Uniquely combines the processing, structure, properties, and applications of conductive polymer composites. Integrates theory and practice. Benefits plastics converters who wish to take full advantage of the potential of conductive plastic materials. This book is written for material scientists and engineers researching and applying these advanced materials for a variety of applications.