Download or read book Dynamic Response of Polymeric Materials Subject to Extreme Environments Under Dynamic Fracture and Impact Conditions written by Rodrigo Enrique Chavez Morales and published by . This book was released on 2020 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymeric materials, in particular composite materials, have seen an increase in use in naval applications. Under these conditions, structural materials need to be able to withstand dynamic loads such as those from underwater blast and wave slamming, as well as environmental factors like moisture absorption and ultraviolet radiation. Both conditions add challenges in the design process due to complex loading conditions and change in material behavior. This dissertation presents an experimental study to understand the dynamic fracture behavior of poly(methyl methacrylate) (PMMA) and carbon fiber/epoxy. Dynamic loading was obtained by launching projectiles from a gas gun onto the specimen. A combination of ultra high-speed photography and digital image correlation was used to gather full-field experimental data. First, a methodology was established using PMMA to obtain pure mode-II fracture loading conditions. This study generated valuable experimental results, which updated current data available to the fracture community. Sharp transitions from mode-II to mode-I fracture loading were observed in addition to the effect of crack-tip sharpness and loading conditions on the crack path. Next, carbon fiber/epoxy specimens were studied after developing an experimental setup capable of obtaining dynamic mode-II loading conditions. The effect of moisture absorption on the fracture behavior of unidirectional carbon fiber/epoxy samples was studied. Two different methods were used to obtain significant moisture contents, first, samples were hygrothermally aged at 65°C for 28 days and second, submersion in room temperature distilled water for 400 days. Additionally, a control group of samples with no moisture content was used to compare results. This study determined that moisture absorption decreased the fracture toughness of the material, however no differences were observed between the different aging methods. Last, unidirectional and woven carbon fiber samples were subject to mixed mode loading. The samples were hygrothermally aged at 65°C until they achieved moisture saturation. Mixed mode loading and woven composites allowed for the opportunity to create more realistic conditions compared to unidirectional composites under pure mode-II fracture. At the same time, these changes introduced complexities at the onset of crack growth. Unlike the previous experiment, the samples showed no sensitivity to moisture.
Download or read book Dynamic Behavior of Materials Volume 1 written by Jamie Kimberley and published by Springer. This book was released on 2018-10-27 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dynamic Behavior of Materials, Volume 1 of the Proceedings of the 2018 SEM Annual Conference & Exposition on Experimental and Applied Mechanics, the first volume of eight from the Conference, brings together contributions to this important area of research and engineering. The collection presents early findings and case studies on fundamental and applied aspects of Experimental Mechanics, including papers on: Synchrotron Applications/Advanced Dynamic Imaging Quantitative Visualization of Dynamic Events Novel Experimental Techniques Dynamic Behavior of Geomaterials Dynamic Failure & Fragmentation Dynamic Response of Low Impedance Materials Hybrid Experimental/Computational Studies Shock and Blast Loading Advances in Material Modeling Industrial Applications
Download or read book Dynamic Impact Response Behavior of Polymeric Materials written by William B. Hillig and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dynamic Fracture of Medium Density Polyethylene Under Impact Loading Conditions written by Carla Ferreira Martins and published by . This book was released on 2001 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dynamic Impact Response Behavior of Polymeric Materials 2 written by and published by . This book was released on 1979 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the work performed in the 14-month period beginning August 26, 1977, relating to a basic study of the materials response processes primarily of polymethylmethacrylate PMMA, polycarbonate PC, and epoxy resins during a ballistic impact encounter. Experimental impact data on PMMA, PC, and epoxy have been obtained using 19 and 4.5 mm diameter strikers at impact velocities of 1.77 and 2.93 m/sec. The data have been analyzed. The irreversible work absorbed by the specimen for a given impact energy, the depth of penetration, and the pulse duration increase in the order PMMA
Download or read book Impact Response of Polymeric Materials at Varying Depths of Penetration written by ML. Jurosek and published by . This book was released on 1986 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: Usually, an impact test is conducted to the point of fracture, so that the fracture energy and other fracture properties of a material under impact loading conditions can be assessed. To understand the fundamentals of and gain insight into impact phenomena, it would be valuable to monitor and quantify the deformation mechanics in a material leading to fracture and to relate the deformation profile history to the resulting impact traces. This task is accomplished in the present paper by carrying out impact tests at varying depths of penetration using a Rheometrics impact tester. The materials under investigation are a rubber-modified polystyrene [high-impact polystyrene (HIPS)] and a high-density polyethylene (HDPE).
Download or read book Advances in Thick Section Composite and Sandwich Structures written by Sung W. Lee and published by Springer Nature. This book was released on 2020-01-28 with total page 673 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes recent research findings on response and integrity of thick section composite and sandwich structures. In particular, it deals with these structures for marine applications under static and dynamic loads such as shock and slamming loads in severe sea environment including sea water, temperature extremes, hydrostatic pressure and Arctic conditions. Three-dimensional constitutive equations and failure criteria for structural response and integrity are considered. The book serves as an excellent repository of major advances in research on response and integrity of composite and sandwich structures made through research grants sponsored by the U.S. Office of Naval Research in the past decade. Collects major advances in response and integrity research; Emphasizes phenomena within severe environments; Illustrates underwater fluid-structure interactions, shock/blast loads, and slamming loads.
Download or read book Photomechanics written by Pramod K. Rastogi and published by Springer Science & Business Media. This book was released on 2003-07-01 with total page 485 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presenting the use of photonics techniques for measurement in mechanics, this book provides a state-of-the-art review of this active and rapidly growing field. It serves as an invaluable resource for readers to explore the current status and includes a wealth of information on the essential principles and methods. It provides a substantial background in a concise and simple way to enable physicists and engineers to assess, analyze and implement experimental systems needed to solve their specific measurement problems.
Download or read book Lightweight Ballistic Composites written by Ashok Bhatnagar and published by Woodhead Publishing. This book was released on 2016-04-19 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lightweight Ballistic Composites: Military and Law-Enforcement Applications, Second Edition, is a fully revised and updated version of this informative book that explores the many changes in composite materials technology that have occurred since the book's first release in 2008, especially the type of commercial products used by armed forces around the world. Some changes can be attributed to the wars in Iraq and Afghanistan, whereas others are due to massive investment by private companies to neutralize the ever-increasing global threats and fulfill the military's appetite for lighter materials. Soldiers are now better protected against new ballistic threats and the overall weight of body protection has been reduced, while comfort has increased. New military vehicles are no longer purely armored with steel, and are instead lined with lightweight ballistic materials that increase the distance military vehicles can travel without refueling and also improve maneuverability. The book considers all aspects of lightweight ballistic composites from fiber manufacturing to commercial products and testing. Chapters also cover the many uses of lightweight ballistic composites in the military and law-enforcement industries. It will be an invaluable reference for ballistic composite design engineers, product development engineers, and all those involved in promoting new products for both defense and the law-enforcement industry. - Gives comprehensive coverage on all aspects of lightweight ballistic composites, from fiber manufacturing, to commercial products and testing - Discusses the wider applications of lightweight ballistic composites in military and law-enforcement industries - Edited by a highly respected industry expert with over thirty years' experience developing lightweight composite ballistic materials and products
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied mechanics reviews written by and published by . This book was released on 1948 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mechanics of Solid Polymers written by Jorgen S Bergstrom and published by William Andrew. This book was released on 2015-07-11 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt: Very few polymer mechanics problems are solved with only pen and paper today, and virtually all academic research and industrial work relies heavily on finite element simulations and specialized computer software. Introducing and demonstrating the utility of computational tools and simulations, Mechanics of Solid Polymers provides a modern view of how solid polymers behave, how they can be experimentally characterized, and how to predict their behavior in different load environments. Reflecting the significant progress made in the understanding of polymer behaviour over the last two decades, this book will discuss recent developments and compare them to classical theories. The book shows how best to make use of commercially available finite element software to solve polymer mechanics problems, introducing readers to the current state of the art in predicting failure using a combination of experiment and computational techniques. Case studies and example Matlab code are also included. As industry and academia are increasingly reliant on advanced computational mechanics software to implement sophisticated constitutive models – and authoritative information is hard to find in one place - this book provides engineers with what they need to know to make best use of the technology available. - Helps professionals deploy the latest experimental polymer testing methods to assess suitability for applications - Discusses material models for different polymer types - Shows how to best make use of available finite element software to model polymer behaviour, and includes case studies and example code to help engineers and researchers apply it to their work
Download or read book Energy Research Abstracts written by and published by . This book was released on 1988 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Repair of Polymer Composites written by Andrew J. Jefferson and published by Woodhead Publishing. This book was released on 2018-02-27 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Repair of Polymer Composites: Methodology, Techniques, and Challenges discusses fundamental issues related to the repair of composites and their suitability in various industrial sectors, such as aerospace, automotive, marine and construction, etc. The repair of composites is complex and requires a thorough understanding of the various types of damage mechanisms in order to apply the appropriate NDT techniques. This book explores these issues in significant detail and presents systematic procedures and methods, thus serving as a useful reference for both undergraduate and postgraduate students, academic researchers, engineers and other professionals who are interested in this exciting field of research.
Download or read book Government Reports Annual Index written by and published by . This book was released on 1994 with total page 1688 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dynamic Fracture Mechanics written by Arun Shukla and published by World Scientific. This book was released on 2006 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering a wide variety of topics in dynamic fracture mechanics, this volume presents state-of-the-art experimental techniques and theoretical analysis on dynamic fracture in standard and exotic materials. Written by world renowned researchers, this valuable compendium contains eleven chapters on crack initiation, crack propagation, crack arrest, crack-stress wave interactions, and experimental, analytical and numerical methods in dynamic fracture mechanics. Contents: Modeling Dynamic Fracture Using Large-Scale Atomistic Simulations (H-J Gao & M J Buehler); Dynamic Crack Initiation Toughness (D Rittel); The Dynamics of Rapidly Moving Tensile Cracks in Brittle Amorphous Material (J Fineberg); Optical Methods for Dynamic Fracture Mechanics (H V Tippur); On the Use of Strain Gages in Dynamic Fracture (V Parameswaran & A Shukla); Dynamic and Crack Arrest Fracture Toughness (R E Link & R Chona); Dynamic Fracture in Graded Materials (A Shukla & N Jain); Dynamic Fracture Initiation Toughness at Elevated Temperatures with Application to the New Generation of Titanium Aluminides Alloys (M Shazly et al.); Dynamic Fracture of Nanocomposite Materials (A Shukla et al.). Readership: Researchers, practitioners, and graduate students in fracture mechanics and materials science.
Download or read book Solid Mechanics Research Trends and Oppotunities written by and published by . This book was released on 1985 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
