Voids in Materials

Voids in Materials
Author: Gary M. Gladysz
Publisher: Newnes
Total Pages: 215
Release: 2014-09-09
Genre: Science
ISBN: 0444563741

Voids in Materials treats voids of different shapes and forms in various materials, and examines their effects on material properties. The book covers the origins of voids in materials, how they are sometimes introduced in the form of hollow spheres, and the resultant properties of materials containing voids. There are many books that focus on foams (which intentionally incorporate voids into materials) and that cover voids incidental to or unwanted in the fabrication of non-porous materials. In fact, all materials have voids. This book starts from the premise that voids are pervasive in all material on some level. It goes beyond foams to provide a comprehensive overview of voids, a central reference for scientists and engineers to use for the effect of voids in materials. - Includes 3D renderings of void geometries - Explains how and why voids are introduced into materials across the length scales; from nanometer-scale voids up to macro-scale voids - Provides a continuous picture of how material properties change as the volume fraction of voids increases, and the implications for product design

Voids in Materials

Voids in Materials
Author: Gary M. Gladysz
Publisher: Elsevier
Total Pages: 339
Release: 2020-11-30
Genre: Science
ISBN: 0128192836

All materials have voids in them, at some scale. Sometimes the voids are ignored, sometimes they are taken into account, and other times they are the focal point of the research. Voids in Materials: From Unavoidable Defects to Designed Cellular Materials takes due notice of all these occurrences, whether designed or unavoidable defects. We define, categorize, and characterize the voids (or empty spaces in materials) and we analyze the effects they have on material properties. This second edition is an updated and expanded central reference for voids in materials and covers all types of voids, intrinsic and intentional, and stochastic and nonstochastic, and the processes and conditions that are needed to create them and is a valuable resource to students in the areas of mechanical engineering, chemical engineering, materials science and engineering, physics, and chemistry, as well as scientists, researchers, and engineers in industry. - the effect of voids in materials; from low volume fraction defects and free volume in polymer networks to high void volume fraction foams and aerogels - how and why voids are introduced into materials across the length scales - biomaterial design used in vivo for soft, hard, and nerve tissue scaffolds - metallic and geopolymeric foams - additive manufacturing technologies used to tailor regularity (R) in the cell structure - stochastic, nonstochastic, and Voronoi foams - the latest techniques for characterizing voids - new chapters, covering the Kirkendall effect to create hollow and porous structures, and nanometer scale voids: nanotubes, zeolites, organic frameworks, and nanoporous noble metals

Topics in Fracture and Fatigue

Topics in Fracture and Fatigue
Author: A.S. Argon
Publisher: Springer Science & Business Media
Total Pages: 354
Release: 2012-12-06
Genre: Technology & Engineering
ISBN: 1461229340

Fracture in structural materials remains a vital consideration in engineering systems, affecting the reliability of machines throughout their lives. Impressive advances in both the theoretical understanding of fracture mechanisms and practical developments that offer possibilities of control have re-shaped the subject over the past four decades. The contributors to this volume, including some of the most prominent researchers in the field, give their long-range perspectives of the research on the fracture of solids and its achievements. The subjects covered in this volume include: statistics of brittle fracture, transition of fracture from brittle to ductile, mechanics and mechanisms of ductile separation of heterogenous solids, the crack tip environment in ductile fracture, and mechanisms and mechanics of fatigue. Materials considered range from the usual structural solids to composites. The chapters include both theoretical points of view and discussions of key experiments. Contributors include: from MIT, A.S. Argon, D.M. Parks; from Cambridge, M.F. Ashby; from U.C. Santa Barbara, A.G. Evans, R. McMeeking; from Glasgow, J. Hancock; from Harvard, J.W. Hutchinson, J.R. Rice; from Sheffield, K.J. Miller; from Brown, A. Needleman; from the Ecole des Mines, A. Pineau; from U.C. Berkeley, R. O. Ritchie; and from Copenhagen, V. Tvergaard.

Vital Voids

Vital Voids
Author: Andrew Finegold
Publisher: University of Texas Press
Total Pages: 185
Release: 2021-05-11
Genre: Art
ISBN: 1477323287

The Resurrection Plate, a Late Classic Maya dish, is decorated with an arresting scene. The Maize God, assisted by two other deities, emerges reborn from a turtle shell. At the center of the plate, in the middle of the god’s body and aligned with the point of emergence, there is a curious sight: a small, neatly drilled hole. Art historian Andrew Finegold explores the meanings attributed to this and other holes in Mesoamerican material culture, arguing that such spaces were broadly understood as conduits of vital forces and material abundance, prerequisites for the emergence of life. Beginning with, and repeatedly returning to, the Resurrection Plate, this study explores the generative potential attributed to a wide variety of cavities and holes in Mesoamerica, ranging from the perforated dishes placed in Classic Maya burials, to caves and architectural voids, to the piercing of human flesh. Holes are also discussed in relation to fire, based on the common means through which both were produced: drilling. Ultimately, by attending to what is not there, Vital Voids offers a fascinating approach to Mesoamerican cosmology and material culture.

Defects and Damage in Composite Materials and Structures

Defects and Damage in Composite Materials and Structures
Author: Rikard Benton Heslehurst
Publisher: CRC Press
Total Pages: 216
Release: 2014-04-21
Genre: Technology & Engineering
ISBN: 146658047X

The advantages of composite materials include a high specific strength and stiffness, formability, and a comparative resistance to fatigue cracking and corrosion. However, not forsaking these advantages, composite materials are prone to a wide range of defects and damage that can significantly reduce the residual strength and stiffness of a structure or result in unfavorable load paths. Emphasizing defect identification and restitution, Defects and Damage in Composite Materials and Structures explains how defects and damage in composite materials and structures impact composite component performance. Providing ready access to an extensive, descriptive list of defects and damage types, this must-have reference: Examines defect criticality in composite structures Recommends repair actions to restore structural integrity Discusses failure modes and mechanisms of composites due to defects Reviews NDI processes for finding and identifying defects in composite materials Relating defect detection methods to defect type, the author merges his experience in the field of in-service activities for composite airframe maintenance and repair with indispensable reports and articles on defects and damage in advanced composite materials from the last 50 years.

Fundamentals of Radiation Materials Science

Fundamentals of Radiation Materials Science
Author: Gary S. Was
Publisher: Springer Science & Business Media
Total Pages: 839
Release: 2007-07-16
Genre: Technology & Engineering
ISBN: 3540494715

This book is an eye-opening treatise on the fundamentals of the effects of radiation on metals and alloys. When energetic particles strike a solid, numerous processes occur that can change the physical and mechanical properties of the material. Metals and alloys represent an important class of materials that are subject to intense radiation fields. Radiation causes metals and alloys to swell, distort, blister, harden, soften and deform. This textbook and reference covers the basics of particle-atom interaction for a range of particle types, the amount and spatial extent of the resulting radiation damage, the physical effects of irradiation and the changes in mechanical behavior of irradiated metals and alloys.

Optical Microscopy of Fiber-Reinforced Composites

Optical Microscopy of Fiber-Reinforced Composites
Author: Brian S. Hayes
Publisher: ASM International
Total Pages: 274
Release: 2010-01-01
Genre: Technology & Engineering
ISBN: 161503143X

Optical microscopy is one of the most valuable--but under utilized--tools for analyzing fiber reinforced polymer matrix composites. This hands-on instructional book covers everything: sample preparation, microscopic techniques, and applications. The power of optical microscopy to study the microstructure of these heterogeneous, anisotropic materials is illustrated with over 180 full color images.

Finite Element Analysis of Composite Materials

Finite Element Analysis of Composite Materials
Author: Ever J. Barbero
Publisher: CRC Press
Total Pages: 352
Release: 2007-08-03
Genre: Technology & Engineering
ISBN: 1420054341

Designing structures using composite materials poses unique challenges due especially to the need for concurrent design of both material and structure. Students are faced with two options: textbooks that teach the theory of advanced mechanics of composites, but lack computational examples of advanced analysis; and books on finite element analysis that may or may not demonstrate very limited applications to composites. But now there is third option that makes the other two obsolete: Ever J. Barbero's Finite Element Analysis of Composite Materials. By layering detailed theoretical and conceptual discussions with fully developed examples, this text supplies the missing link between theory and implementation. In-depth discussions cover all of the major aspects of advanced analysis, including three-dimensional effects, viscoelasticity, edge effects, elastic instability, damage, and delamination. More than 50 complete examples using mainly ANSYSTM, but also including some use of MATLAB®, demonstrate how to use the concepts to formulate and execute finite element analyses and how to interpret the results in engineering terms. Additionally, the source code for each example is available for download online. Cementing applied computational and analytical experience to a firm foundation of basic concepts and theory, Finite Element Analysis of Composite Materials offers a modern, practical, and versatile classroom tool for today's engineering classroom.

Imaging Methods for Novel Materials and Challenging Applications, Volume 3

Imaging Methods for Novel Materials and Challenging Applications, Volume 3
Author: Helena Jin
Publisher: Springer Science & Business Media
Total Pages: 433
Release: 2012-09-22
Genre: Science
ISBN: 1461442354

Imaging Methods for Novel Materials and Challenging Applications, Volume 3: Proceedings of the 2012 Annual Conference on Experimental and Applied Mechanics, the third volume of seven from the Conference, brings together 62 contributions to this important area of research and engineering. The collection presents early findings and case studies on fundamental and applied aspects of Experimental and Applied Mechanics, including papers on: Role of optical interferometry in advancement of material characterization Three-dimensional imaging and volumetric correlation Digital holography and experimental mechanics Digital image correlation Metrology and displacement measurement at different scales Optical methods for dynamic tests Optical methods for and with MEMS and NEMS Thermomechanics and infrared imaging Imaging methods applied to biomaterials and soft materials Applied photoelasticity Optical measurement systems using polarized light Hybrid imaging techniques Contouring of surfaces Novel optical techniques

Failure Criteria in Fibre Reinforced Polymer Composites

Failure Criteria in Fibre Reinforced Polymer Composites
Author: M. Hinton
Publisher: Elsevier
Total Pages: 1276
Release: 2004-08-31
Genre: Science
ISBN: 9780080444758

Fiber reinforced polymer composites are an extremely broad and versatile class of material.Their high strength coupled with lightweight leads to their use wherever structural efficiency is at a premium. Applications can be found in aircraft, process plants, sporting goods and military equipment. However they are heterogeneous in construction and antisotropic, which makes making strength prediction extremely difficult especially compared to that of a metal. This book brings together the results of a 12year worldwide failure exercise encompassing 19 theories in a single volume. Each contributor describes their own theory and employs it to solve 14 challenging problems. The accuracy of predictions and the performance of the theories are assessed and recommendations made on the uses of the theories in engineering design. All the necessary information is provided for the methodology to be readily employed for validating and benchmarking new theories as they emerge. Brings together 19 failure theories, with many application examples. Compares the leading failure theories with one another and with experimental data Failure to apply these theories could result in potentially unsafe designs or over design.