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Author : Anders Ohlsson
Publisher :
ISBN 13 : 9789178707560
Total Pages : 154 pages
Book Rating : 4.7/5 (75 download)
Download or read book Thermal Residual Stresses in Metal Matrix Composites written by Anders Ohlsson and published by . This book was released on 1991 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : E. V. Barrera
Publisher : Minerals, Metals, & Materials Society
ISBN 13 :
Total Pages : 344 pages
Book Rating : 4.X/5 (2 download)
Download or read book Residual Stresses in Composites written by E. V. Barrera and published by Minerals, Metals, & Materials Society. This book was released on 1993 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains the proceedings of a conference on the residual stresses in composites. It offers three interrelated objectives: present developments in the measurement of residuals composites; present analytical predictions of residual stresses and their impact on composite properties; and documents the role of the residual stresses during thermo-mechanical excursions of the composites.
Author : John M. Kennedy
Publisher : ASTM International
ISBN 13 : 0803113854
Total Pages : 260 pages
Book Rating : 4.8/5 (31 download)
Download or read book Thermal and Mechanical Behavior of Metal Matrix and Ceramic Matrix Composites written by John M. Kennedy and published by ASTM International. This book was released on 1990 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: Of interest to researchers and practitioners in materials science, especially in the aerospace industry, 16 papers from a symposium in Atlanta, Georgia, November 1988 discuss the analysis, modeling, and behavior of both continuous and discontinuous ceramic and metal matrix composites, and methods of
Author : Mahmood M. Shokrieh
Publisher : Woodhead Publishing
ISBN 13 : 0128188189
Total Pages : 506 pages
Book Rating : 4.1/5 (281 download)
Download or read book Residual Stresses in Composite Materials written by Mahmood M. Shokrieh and published by Woodhead Publishing. This book was released on 2021-06-22 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt: The residual stress is a common phenomenon in composite materials. They can either add to or significantly reduce material strength. Because of the increasing demand for high-strength, lightweight materials such as composites and their wide range of applications; it is critical that the residual stresses of composite materials are understood and measured correctly.The first edition of this book consists of thirteen chapters divided into two parts. The first part reviews destructive and non-destructive testing (NDT) techniques for measuring residual stresses. There are also additional chapters on using mathematical (analytical and numerical) methods for the calculation of residual stresses in composite materials. These include the simulated hole drilling method, the slitting/crack compliance method, measuring residual stresses in homogeneous and composite glass materials using photoelastic techniques, and modeling residual stresses in composite materials. The second part of the book discusses measuring residual stresses in different types of composites including polymer and metal matrix composites. The addition of nanoparticles to the matrix of polymeric composites as a new technique for the reduction of residual stresses is also discussed.In the Second Edition of this book, each of the original chapters of the first edition has been fully updated, taking into account the latest research and new developments. There are also five new chapters on the theoretical and experimental studies of residual stresses in the composite integrated circuits; residual stresses in additive manufacturing of polymers and polymer matrix composites; residual stresses in metal matrix composites fabricated by additive manufacturing; the eigenstrain based method for the incremental hole-drilling technique; and the estimation of residual stresses in polymer matrix composites using the digital image correlation technique.Residual Stresses in Composite Materials, Second Edition, provides a unique and comprehensive overview of this important topic and is an invaluable reference text for both academics and professionals working in the mechanical engineering, civil engineering, aerospace, automotive, marine, and sporting industries. - Presents the latest developments on theoretical and experimental studies of residual stresses in composites - Reviews destructive and non-destructive testing (NDT) techniques for measuring residual stresses - Discusses residual stresses in the polymer matrix, metal matrix, and ceramic matrix composites - Considers the addition of nanoparticles to the matrix as a new technique for reduction of residual stresses in polymeric composites - Introduces the latest advancements of research on the residual stresses in additive-manufactured polymer and metal matrix composites
Author : John D. Sims
Publisher :
ISBN 13 :
Total Pages : 68 pages
Book Rating : 4.:/5 (227 download)
Download or read book Effect of Thermal Residual Stresses on the Stress-Strain Behavior of Metal-Matrix Composites written by John D. Sims and published by . This book was released on 1990 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: A parametric study was conducted to assess the effect of thermal residual stresses on the stress-strain response of a fiber-reinforced metal-matrix composite. The material chosen for investigation was silicon carbides/whisker reinforced Al 6061 system. The effects of fiber volume fraction, fiber aspect ratio and fiber spacing were analyzed within the framework of axisymmetric finite element models to determine the overall constitutive response of the composite materials as well as to solve for local field quantities in the fiber and matrix. The composite was modeled as a periodic array of cylindrical fibers, laterally aligned in one model and staggered in the other. Perfect interfacial bonding and complete fiber alignment with the tensile axis were assumed. The results indicated that (1) composite stiffness, yield strength and work hardening rate increased with increasing volume fraction and fiber aspect ratio and (2) variations in fiber spacing primarily affect work hardening rate and have negligible effect on composite stiffness. It was found that the presence of residual stresses affected the stress-strain behavior of the composite by influencing the load transfer characteristics between the matrix and fiber as well as the initiation and growth of plastic deformation in the matrix.
Author : M. Taya
Publisher :
ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.:/5 (125 download)
Download or read book Residual Stresses In and Around a Short Fiber in Metal Matrix Composites Due To Temperature Change written by M. Taya and published by . This book was released on 1985 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Residual stresses in and around short fibers in metal matrix composites due to temperature change are evaluated. An analytical result for the residual stress in the fiber is obtained by use of Somigliana dislocations at the matrix-fiber interface. These dislocations are introduced to accommodate the misfit of the thermal expansion difference between fibers and the matrix. These dislocations are responsible for the residual stresses after the composite material is cooled down to room temperature.
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781723457173
Total Pages : 166 pages
Book Rating : 4.4/5 (571 download)
Download or read book Thermal Stress Effects in Intermetallic Matrix Composites written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-23 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Intermetallic matrix composites develop residual stresses from the large thermal expansion mismatch (delta-alpha) between the fibers and matrix. This work was undertaken to: establish improved techniques to measure these thermal stresses in IMC's; determine residual stresses in a variety of IMC systems by experiments and modeling; and, determine the effect of residual stresses on selected mechanical properties of an IMC. X ray diffraction (XRD), neutron diffraction (ND), synchrotron XRD (SXRD), and ultrasonics (US) techniques for measuring thermal stresses in IMC were examined and ND was selected as the most promising technique. ND was demonstrated on a variety of IMC systems encompassing Ti- and Ni-base matrices, SiC, W, and Al2O3 fibers, and different fiber fractions (Vf). Experimental results on these systems agreed with predictions of a concentric cylinder model. In SiC/Ti-base systems, little yielding was found and stresses were controlled primarily by delta-alpha and Vf. In Ni-base matrix systems, yield strength of the matrix and Vf controlled stress levels. The longitudinal residual stresses in SCS-6/Ti-24Al-llNb composite were modified by thermomechanical processing. Increasing residual stress decreased ultimate tensile strength in agreement with model predictions. Fiber pushout strength showed an unexpected inverse correlation with residual stress. In-plane shear yield strength showed no dependence on residual stress. Higher levels of residual tension led to higher fatigue crack growth rates, as suggested by matrix mean stress effects. Wright, P. K. and Sensmeier, M. D. and Kupperman, D. S. and Wadley, H. N. G. Unspecified Center MECHANICAL PROPERTIES; METAL MATRIX COMPOSITES; MICROSTRUCTURE; NEUTRON DIFFRACTION; RESIDUAL STRESS; STRESS MEASUREMENT; THERMAL STRESSES; ULTRASONICS; X RAY DIFFRACTION; CONCENTRIC CYLINDERS; CRACK PROPAGATION; FATIGUE (MATERIALS); FIBER STRENGTH; FRACTURE STRENGTH; SHEAR STRENGTH; TENSILE STRENGTH; THERMAL EXPANSION; YIELD STREN...
Author : Daniel M. Seigenthaler
Publisher :
ISBN 13 :
Total Pages : 78 pages
Book Rating : 4.:/5 (14 download)
Download or read book Effect of Thermal Residual Stresses on the Stress-strain Behavior of Metal-matrix Composites written by Daniel M. Seigenthaler and published by . This book was released on 1991 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: A phenomenological and parametric study was conducted to assess the effect of thermal residual stresses on the stress-strain response of a discontinuous fiber-reinforced metal-matrix composite in tensile and compressive loading. The material chosen for this investigation was the silicon carbide whisker reinforced aluminum 6061. The difference between composite flow behavior in tension and compression, as well as the effects of volume fraction, fiber aspect ratio and fiber spacing were analyzed within the framework of axisymmetric finite element models to determine the overall constitutive response of the composite and to solve for local field quantities in the fiber and the matrix. The composite was modeled as a periodic array of cylindrical fibers with perfect interfacial bonding and complete fiber alignment with the tensile/compressive axis. It was found that the presence of residual stresses affected the stress-strain behavior of the composite by influencing the load transfer characteristics between the matrix and the fiber as well as the initiation and growth of the plastic deformation in the matrix. The results of the study indicated that a significant strength differential exists between tensile and compressive loading and that this effect diminishes with increasing volume fraction. The results also indicated that composite stiffness, yield strength and work-hardening rate increase with increasing volume fraction and fiber aspect ratio.
Author : Michael Schöbel
Publisher : Sudwestdeutscher Verlag Fur Hochschulschriften AG
ISBN 13 : 9783838128993
Total Pages : 148 pages
Book Rating : 4.1/5 (289 download)
Download or read book Residual Stresses and Thermal Fatigue in Metal Matrix Composites written by Michael Schöbel and published by Sudwestdeutscher Verlag Fur Hochschulschriften AG. This book was released on 2011-11-25 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal matrix composites are developed as heat sink materials with superior thermal properties. Future applications like power electronics or fusion reactors require new solutions on thermal management. In this work several composite types with fiber and particle reinforcements were investigated under simulated operation conditions, concerning their internal stresses and thermal fatigue damage. New non-destructive methods such as neutron/synchrotron diffraction and synchrotron tomography were combined for in situ experiments. The phase sensitive study of elastic as well as plastic deformation processes on the microscopic scale allowed conclusions on reinforcement architectures, their types and effects on thermal fatigue damage in composites. A comparison of neutron with synchrotron radiation was given by the example of diffraction and its experimental capabilities for heterogeneous materials.
Author : N. Shi
Publisher :
ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.:/5 (125 download)
Download or read book The Effect of Thermal Residual Stresses on the Asymmetric Constitutive Behavior of Metal-Matrix Composites written by N. Shi and published by . This book was released on 1991 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: An analytical investigation of the difference in the constitutive behavior of silicon carbide-aluminum (SiC-Al) composites under uniaxial compressive and tensile loading was carried out, and the associated changes of the residual stresses were studied. It is suggested that the observed asymmetric response of the constitutive behavior is primarily due to the existence of residual stresses in the composite. These residual stresses are initially introduced because of the differences in the coefficients of thermal expansion (?CTE) during the cooling process and subsequently changed after the external load is applied. A two-dimensional (2-D) finite element analysis of a hexagonal array of SiC whiskers in an Al matrix was performed, the result of which testifies to the appropriateness of the proposed explanation. It is concluded that the 2-D finite element analysis is an economical way of adequately reproducing the most prominent features of the material's constitutive behavior. Based upon the theory of mechanics of composite material, simplified analytical models were developed which can be used to investigate the influences of the whisker-matrix interface shear load transfer and the volume mismatch on the residual stresses. It is concluded that the mechanism of load transfer in terms of normal stress at the whisker tip, which is governed by the volume (bulk) mismatch between the matrix and the whisker, is predominantly responsible for altering the specific pattern of the residual stresses under the applied load. In contrast, the effect of shear load transfer at the longitudinal whisker-matrix interface is only restricted to a very small region in the vicinity of the whisker and does not influence the overall symmetry of the constitutive behavior.
Author : T. Mura
Publisher : Springer Science & Business Media
ISBN 13 : 9789024732562
Total Pages : 616 pages
Book Rating : 4.7/5 (325 download)
Download or read book Micromechanics of Defects in Solids written by T. Mura and published by Springer Science & Business Media. This book was released on 1987-11-30 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book stems from a course on Micromechanics that I started about fifteen years ago at Northwestern University. At that time, micromechanics was a rather unfamiliar subject. Although I repeated the course every year, I was never convinced that my notes have quite developed into a final manuscript because new topics emerged constantly requiring revisions, and additions. I finally came to realize that if this is continued, then I will never complete the book to my total satisfaction. Meanwhile, T. Mori and I had coauthored a book in Japanese, entitled Micromechanics, published by Baifu-kan, Tokyo, in 1975. It received an extremely favorable response from students and re searchers in Japan. This encouraged me to go ahead and publish my course notes in their latest version, as this book, which contains further development of the subject and is more comprehensive than the one published in Japanese. Micromechanics encompasses mechanics related to microstructures of materials. The method employed is a continuum theory of elasticity yet its applications cover a broad area relating to the mechanical behavior of materi als: plasticity, fracture and fatigue, constitutive equations, composite materi als, polycrystals, etc. These subjects are treated in this book by means of a powerful and unified method which is called the 'eigenstrain method. ' In particular, problems relating to inclusions and dislocations are most effectively analyzed by this method, and therefore, special emphasis is placed on these topics.
Author : Eric Richard Olivas
Publisher :
ISBN 13 :
Total Pages : 158 pages
Book Rating : 4.:/5 (631 download)
Download or read book Investigation of Mechanical Properties and Thermal Residual Stresses in Particle Reinforced Metal Matrix Composites Using Instrumented Nano- and Micro-indentation written by Eric Richard Olivas and published by . This book was released on 2005 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : National Aeronautics and Space Adm Nasa
Publisher :
ISBN 13 : 9781728996158
Total Pages : 30 pages
Book Rating : 4.9/5 (961 download)
Download or read book Simplified Micromechanical Equations for Thermal Residual Stress Analysis of Coated Fiber Composites written by National Aeronautics and Space Adm Nasa and published by . This book was released on 2018-10-19 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fabrication of metal matrix composites poses unique problems to the materials engineer. The large thermal expansion coefficient (CTE) mismatch between the fiber and matrix leads to high tensile residual stresses at the fiber/matrix (F/M) interface which could lead to premature matrix cracking during cooldown. Fiber coatings could be used to reduce thermal residual stresses. A simple closed form analysis, based on a three phase composite cylinder model, was developed to calculate thermal residual stresses in a fiber/interphase/matrix system. Parametric studies showed that the tensile thermal residual stresses at the F/M interface were very sensitive to the CTE and thickness of the interphase layer. The modulus of the layer had only a moderate effect on tensile residual stresses. For a silicon carbide titanium aluminide composite, the tangential stresses were 20 to 30 pct. larger than the axial stresses, over a wide range of interphase layer properties, indicating a tendency to form radial matrix cracks during cooldown. Guidelines for the selection of appropriate material properties of the fiber coating were also derived in order to minimize thermal residual stresses in the matrix during fabrication. Naik, R. A. Unspecified Center NAS1-18599; RTOP 505-63-50-04...
Author :
Publisher :
ISBN 13 :
Total Pages : 30 pages
Book Rating : 4.:/5 (317 download)
Download or read book Simplified Micromechanical Equations for Thermal Residual Stress Analysis of Coated Fiber Composites written by and published by . This book was released on 1991 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Minoru Taya
Publisher : Elsevier
ISBN 13 : 1483191133
Total Pages : 275 pages
Book Rating : 4.4/5 (831 download)
Download or read book Metal Matrix Composites written by Minoru Taya and published by Elsevier. This book was released on 2016-01-11 with total page 275 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal Matrix Composites: Thermomechanical Behavior discusses metal matrix composites, elaborating on that consists of two phases—fiber as reinforcement and metal as matrix. This book focuses on polymer matrix composites, including topics in metal matrix composites ranging from processing to fracture mechanics. The three basic types of composite materials—dispersion-strengthened, particle-reinforced, and fiber (whisker)-reinforced, are also described in detail. Dispersion-strengthened is characterized by a microstructure consisting of an elemental matrix within which fine particles are uniformly dispersed, while particle-reinforced is indicated by dispersed particles of greater than 1.0 μm diameter with a volume fraction of 5 to 40%. Fiber (whisker)-reinforced provides a distinguishing microstructural feature of fiber-reinforced materials, such as that the reinforcing fiber has one long dimension, while the reinforcing particles of the other two types do not. This publication serves as a reference data book to students and researchers aiming to acquire knowledge of the thermomechanical behavior of metal matrix composites.
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781722464646
Total Pages : 34 pages
Book Rating : 4.4/5 (646 download)
Download or read book Optimization of Residual Stresses in MMC's Through the Variation of Interfacial Layer Architectures and Processing Parameters written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-09 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this work was the development of efficient, user-friendly computer codes for optimizing fabrication-induced residual stresses in metal matrix composites through the use of homogeneous and heterogeneous interfacial layer architectures and processing parameter variation. To satisfy this objective, three major computer codes have been developed and delivered to the NASA-Lewis Research Center, namely MCCM, OPTCOMP, and OPTCOMP2. MCCM is a general research-oriented code for investigating the effects of microstructural details, such as layered morphology of SCS-6 SiC fibers and multiple homogeneous interfacial layers, on the inelastic response of unidirectional metal matrix composites under axisymmetric thermomechanical loading. OPTCOMP and OPTCOMP2 combine the major analysis module resident in MCCM with a commercially-available optimization algorithm and are driven by user-friendly interfaces which facilitate input data construction and program execution. OPTCOMP enables the user to identify those dimensions, geometric arrangements and thermoelastoplastic properties of homogeneous interfacial layers that minimize thermal residual stresses for the specified set of constraints. OPTCOMP2 provides additional flexibility in the residual stress optimization through variation of the processing parameters (time, temperature, external pressure and axial load) as well as the microstructure of the interfacial region which is treated as a heterogeneous two-phase composite. Overviews of the capabilities of these codes are provided together with a summary of results that addresses the effects of various microstructural details of the fiber, interfacial layers and matrix region on the optimization of fabrication-induced residual stresses in metal matrix composites. Pindera, Marek-Jerzy and Salzar, Robert S. Glenn Research Center NAS3-26571; RTOP 505-63-12...
Author : T. W. Clyne
Publisher : Cambridge University Press
ISBN 13 : 9780521483575
Total Pages : 532 pages
Book Rating : 4.4/5 (835 download)
Download or read book An Introduction to Metal Matrix Composites written by T. W. Clyne and published by Cambridge University Press. This book was released on 1993 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal matrix composites constitute a new class of materials, now starting to make a major industrial impact in fields as diverse as aerospace, automotives and electronics. This book gives a comprehensive, integrated coverage of these materials, including the background to analytical-, experimental-, production and application-oriented aspects. Clear pictorial descriptions are given of the basic principles governing various properties and characteristics; these encompass mechanical, thermal, electrical, environmental and wear behaviour. Coverage also extends to material processing and component fabrication aspects and to a survey of commercial usage. This book is aimed primarily at scientists, engineers, production managers and all those involved in research on new materials in general, and metal matrix composites in particular, but may also be suitable for use as a text in beginning graduate and advanced undergraduate courses.
