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Dynamic Fracture In Orthotropic Fiber Composites
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Book Synopsis Dynamic Fracture in Orthotropic Fiber Composites by : James H Williams (Jr)
Download or read book Dynamic Fracture in Orthotropic Fiber Composites written by James H Williams (Jr) and published by . This book was released on 1978 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt: The underlying principles of dynamic fracture and crack arrest in fiber composites are reviewed in terms of the conservation of mechanical energy. An approximate Mode 1 dynamic crack extension force for a highly orthotropic 0 degree unidirectional fiber composite is derived. The governing partial differential equations for dynamic crack propagation in double cantilever beam unidirectional composite specimens are derived. A finite-difference scheme for solving these equations is presented along with the stability and convergence criteria for a numerical solution. A conductive grid system for measuring the crack-tip velocity profile is described. This system is capable of assisting in the measurement of the dynamic fracture toughness of fiber composites. (Author).
Book Synopsis Fracture and Fatigue by : Lawrence J. Broutman
Download or read book Fracture and Fatigue written by Lawrence J. Broutman and published by Elsevier. This book was released on 2016-06-15 with total page 485 pages. Available in PDF, EPUB and Kindle. Book excerpt: Composite Materials, Volume 5: Fracture and Fatigue covers the concepts, theories, and experiments on fracture and fatigue behavior of composite materials. The book discusses the fracture of particulate composites, including metal, polymer, and ceramic matrices; relates micromechanics effects to composite strength; and summarizes the various theories relating constituent properties and microstructure to fracture. The text also describes differing theories regarding the strength and fracture of composites; and the theory and experiment relating to time-dependent fracture covering both long-term as well as dynamic fracture. The fatigue of both polymer- and metal-matrix composites and the factors influencing the toughness of both brittle and ductile matrix composites are also considered. Design engineers, materials scientist, materials engineers, and metallurgists will find the book useful.
Book Synopsis Dynamic Fracture Mechanics by : Arun Shukla
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.
Book Synopsis Application of Dynamic Fracture Mechanics Concepts to Composites by :
Download or read book Application of Dynamic Fracture Mechanics Concepts to Composites written by and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report is divided into five chapters covering new analytical solutions for dynamic cracks in orthotropic composites. Each chapter stands alone and has been submitted, accepted or prepared for publication in a refereed journal. First, closed form solutions for uniformly loaded semi-infinite cracks in orthotropic materials are presented. Next, solutions regarding the stress intensity factor at the tip of propagating cracks in orthotropic materials are presented. In addition, closed form, dynamic Green's functions solutions are given for semi-infinite cracks in orthotropic materials. Previously, in last year's report, numerical Green's function solutions were presented for this case the first time. These newer, closed form solutions are much easier to produce and implement in more complex solutions. The problem of having a crack in transversely isotropic material rotated with respect to the crack front is also solved with some effort. The methodology used in finding all these solutions may be used in other problems including penetration mechanics. Such applications are currently being explored. Finally, experimental investigation of the application of these solutions to dynamic crack initiation in composites under impact conditions is being completed.
Book Synopsis Fracture and Damage of Composites by : M. H. Aliabadi
Download or read book Fracture and Damage of Composites written by M. H. Aliabadi and published by WIT Press. This book was released on 2006 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering various aspects of dynamic fractures this book contains state-of-the-art contributions from leading scientists in the field of crack dynamics.
Book Synopsis Investigation of Static and Dynamic Fracture of Orthotropic Media by Photomechanics by : Elizabeth Ann Fuchs
Download or read book Investigation of Static and Dynamic Fracture of Orthotropic Media by Photomechanics written by Elizabeth Ann Fuchs and published by . This book was released on 1983 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Application of Dynamic Fracture Mechanics to Composites by :
Download or read book Application of Dynamic Fracture Mechanics to Composites written by and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report is divided into two parts, one covering the work on orthotropic composites and the other covering the work on isotropic metals. Each part consists of two chapters which stand alone, each having been submitted, accepted or prepared for publication in a referred journal. Separate bibliographies are given for parts 1 and 2. The work on composites has succeeded in producing fundamental, dynamic Green's functions solutions for cracks in orthotropic materials. These solutions may be used in calculating the stress intensity factor history on stationary cracks subjected to dynamic loading and may be very useful in predicting crack initiation under such conditions. Currently, experimental investigation of the application of these solutions to crack initiation in composites in two different configurations is beginning. It is expected that a report on that work will be submitted next year. The work on metals has been successful in experimentally demonstrating the usefulness of the dynamic stress intensity factor in predicting shear failure in metals under impact loads. This demonstration is predicted on the assumption that small scale yielding conditions exist in the experiments. The last chapter reflects an ongoing experimental investigation into the validity of that assumption. It seems to suggest that the assumption is correct, but further, more conclusive results are sought.
Book Synopsis Effect of Reinforcement and Fiber-matrix Interface on Dynamic Fracture of Fiber Reinforced Composite Materials by :
Download or read book Effect of Reinforcement and Fiber-matrix Interface on Dynamic Fracture of Fiber Reinforced Composite Materials written by and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Reinforcement and Fiber-matrix Interface on Dynamic Fracture of Fiber Reinforced Composite Materials by : Sanjeev K. Khanna
Download or read book Effect of Reinforcement and Fiber-matrix Interface on Dynamic Fracture of Fiber Reinforced Composite Materials written by Sanjeev K. Khanna and published by . This book was released on 1992 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fracture Mechanics of Composites by : G. P. Sendeckyj
Download or read book Fracture Mechanics of Composites written by G. P. Sendeckyj and published by ASTM International. This book was released on 1975 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis On the Application of Dynamic Fracture Mechanics to Continuous Fiber Reinforced Composite Materials by :
Download or read book On the Application of Dynamic Fracture Mechanics to Continuous Fiber Reinforced Composite Materials written by and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Progress is reviewed with emphasis on a model of stress intensity factors in dynamic punch test. The specimen is assumed to be initially at rest and the projectile is rigid. Impact of the rigid projectile is modeled by a constant velocity condition on the impact surface. Three support geometries are considered for each specimen geometry: a free back surface, a fixed back surface, and a two dimensional punch. Analytical approximations for the stress intensity factor history are given for short times, while dynamic quarter point finite element solutions are included for longer times. The stress intensity factor is shown to increase with time due to wave reflection in the two dimensional punch and fixed back support geometries, while it decreases with time for the free back surface. The stress intensity factors in the plate specimen are also greater than those in the edge notched specimen in all tests. For applicability to manufacturing operations and increased chance of shear dominated failure, it is recommended that the two dimensional punch or fixed back surface geometries of the plate specimen be used in experimental studies.
Book Synopsis Impact and Dynamic Fracture of Polymers and Composites (ESIS 19) by : J. G. Williams
Download or read book Impact and Dynamic Fracture of Polymers and Composites (ESIS 19) written by J. G. Williams and published by Wiley-Blackwell. This book was released on 1995 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: Impact and Dynamic Fracture of Polymers an Composites consist of thirty-nine reviewed and revised papers presented at the European Symposium on Impact and Dynamic Fractures of Polymers and composites held in Sardinia. The volume is divided into four sections. The first section deals with experimental methods and concepts in high-speed loading. Dynamic crack propagation is described in section 2, and rate-dependence and impact fracture toughness of plastics is dealt with in section 3. the last section is concerned with the impact damage of composites. Finally an extensive index facilitates the location of specific information for readers. This volume is the nineteenth in a series of special technical publications produced by the European Structural Integrity Society. It is an informative and original piece of work and can be thoroughly recommended to engineering designers, manufacturing engineers, and material scientists. Indeed, Impact and Dynamic Fracture of Polymers and Composites makes a significant contribution to the literature on this important subject, and will make essential reading to all those involved in this field of mechanical engineering.
Book Synopsis Dynamic Failure in Composite Materials and Structures by : Y. Rajapakse
Download or read book Dynamic Failure in Composite Materials and Structures written by Y. Rajapakse and published by . This book was released on 2000 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains 13 papers from the November 2000 symposium that review and update the progress of research in dynamic failure of composites. The main subject areas are dynamic compressive failure, dynamic fracture and delamination, impact response and damage, energy absorption, and experimental
Book Synopsis Damage and Fracture of Composite Materials and Structures by : Mohd Nasir Tamin
Download or read book Damage and Fracture of Composite Materials and Structures written by Mohd Nasir Tamin and published by Springer Science & Business Media. This book was released on 2012-01-03 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph presents recent research findings on fracture properties and behavior of the composites, and their damage and cracking process under both quasi-static and impact loading conditions. Theoretical treatment, experimental investigation and numerical simulation aspects of the mechanics of composites, including sandwich structures are included.
Book Synopsis Dynamic Failure in Composite Materials and Structures by : Y. Rajapakse
Download or read book Dynamic Failure in Composite Materials and Structures written by Y. Rajapakse and published by . This book was released on 2001 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Improving the Impact and Fracture Resistance of Fibrous Composites by : Peter William Robert Beaumont
Download or read book Improving the Impact and Fracture Resistance of Fibrous Composites written by Peter William Robert Beaumont and published by . This book was released on 1975 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: A three phase program to improve the impact resistance of composite materials was undertaken. In the first phase, the Charpy impact test is investigated as a method for characterising dynamic behavior. The importance of differentiating between the energies of crack initiation and crack propagation is discussed, and a parameter called the Ductility Index is proposed, together with maximum stress and work of fracture for comparing the dynamic fracture behavior of fiber composites. Slow three point bending and instrumented impact tests were carried out to investigate the quasi-static and dynamic fracture behavior of (1) unidirectional fiber composites consisting of carbon and glass fibers embedded in an epoxy resin matrix; (2) cross-ply carbon fiber-reinforced epoxy resin composites, and (3) a carbon fiber/glass fiber/epoxy resin hybrid composite. It was found that fiber hybridization could raise both the fracture stress and toughness, and ductility index of carbon fiber composite materials.
Book Synopsis Dynamic Fracture Toughness of Polymer Composites by : Harmeet Kaur
Download or read book Dynamic Fracture Toughness of Polymer Composites written by Harmeet Kaur and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymer composites are engineered materials widely being used and yet not completely understood for their dynamic response. It is important to fully characterize material properties before using them for applications in critical industries, like that of defense or transport. In this project, the focus is on determining dynamic fracture toughness property of fiber reinforced polymer composites by using a combined numerical- experimental methodology. Impact tests are conducted on Split-Hopkinson pressure bar with required instrumentation to obtain load-history and initiation of crack propagation parameters followed by finite element analysis to determine desired dynamic properties. Single edge notch bend(SENB) type geometry is used for Mode-I fracture testing and similarly end-notched flexure (ENF) type of geometry is proposed to test the samples for Mode-II type of fracture. Two different linear elastic fracture mechanics approaches are used- crack opening displacement and strain energy release rates. Dynamic fracture toughness values of around 50 MPa[square root of m] and 100 MPa[square root of m] in Mode-I, whereas, around 40 MPa[square root of m] and 6 MPa[square root of m] in Mode-II are observed for carbon-epoxy and fiberglass-epoxy composites respectively. To provide a better estimate of material response, Hashin damage model is employed which takes into account non-linear behavior of composites. As observed in previous studies, values estimated using a non-linear response of composite laminates are nearly three times as high, therefore, using a linear elastic material model could underestimate a material's capacity to sustain dynamic loads without failure. It is concluded that fracture initiation toughness property is rate dependent and is higher when subjected to dynamic loads. Microscopic examination of damaged samples and a higher value of dynamic fracture toughness for fiberglass-epoxy laminates as compared to carbon-epoxy laminates suggest that dynamic fracture toughness is also a function of many other variables like mode of fracture, dominant damage criteria, manufacturing process, constituent materials and their ratios.
