Author: Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 702
Book Description
Modeling the Dynamic Load/Unload Behavior of Ceramics Under Impact Loading
Author: J. R. FurlongPublisher:
ISBN:
Category : Ceramics
Languages : en
Pages : 58
Book Description
The RDA ceramic failure model was used to model the behavior SiC and B4C during plate impact loading. The experiments modeled were performed at Sandia National Laboratory. The simulations were performed with a version of the Sandia WONDY-V hydrocode that was modified to run on a PC and to include the RDA ceramic failure model. The model adequately characterizes the two ceramic materials although B4C and SiC exhibit distinctly different degrees of work hardening, strain rate hardening, and damage sensitivity. Both materials experienced damaged (micro-making) on load which was predicated by the model. The experimental unloading data exhibits a reduced magnitude elastic unload wave which suggests that further damage has accumulated after the ceramic reaches peak stress. A strength reducing mechanism such as fatigue, or melting at grain boundaries are suspected as the cause of this unpredicted strength loss. No spall was evident in the measured signals and the model predicts spall will not occur. The predicted axial stress levels were significantly above the estimated spall strengths of the two ceramics. Failure was prevented by positive (compressive) mean stress levels that were maintained throughout the ceramic specimen during the experimental measurement. Therefore, a suggested conclusion is that for tensile failure to occur in these ceramics, the mean stress must be negative (tensile). (js).
Scientific and Technical Aerospace Reports
Author: Shock Compression of Condensed Matter - 1991
Author: S.C. SchmidtPublisher: Elsevier
ISBN: 1483291456
Category : Science
Languages : en
Pages : 1103
Book Description
The papers collected together in this volume constitute a review of recent research on the response of condensed matter to dynamic high pressures and temperatures. Inlcuded are sections on equations of state, phase transitions, material properties, explosive behavior, measurement techniques, and optical and laser studies. Recent developments in this area such as studies of impact and penetration phenomenology, the development of materials, especially ceramics and molecular dynamics and Monte Carlo simulations are also covered. These latest advances, in addition to the many other results and topics covered by the authors, serve to make this volume the most authoritative source for the shock wave physics community.
Dynamic Behavior of Materials
Author: Mikko HokkaPublisher: Elsevier
ISBN: 0323991548
Category : Technology & Engineering
Languages : en
Pages : 714
Book Description
Dynamic Behavior of Materials: Fundamentals, Material Models, and Microstructure Effects provides readers with the essential knowledge and tools necessary to determine best practice design, modeling, simulation and application strategies for a variety of materials while also covering the fundamentals of how material properties and behavior are affected by material structure and high strain rates. The book examines the relationships between material microstructure and consequent mechanical properties, enabling the development of materials with improved performance and more effective design of parts and components for high-rate applications. Sections cover the fundamentals of dynamic material behavior, with chapters studying dynamic elasticity and wave propagation, dynamic plasticity of crystalline materials, ductile fracture, brittle fracture, adiabatic heating and strain localization, response to shock loading, various material characterization methods, such as the Hopkinson Bar Technique, the Taylor Impact Experiment, different shock loading experiments, recent advances in dynamic material behavior, the dynamic behaviors of nanocrystalline materials, bulk metallic glasses, additively manufactured materials, ceramics, concrete and concrete-reinforced materials, geomaterials, polymers, composites, and biomaterials, and much more. - Focuses on the relationship between material microstructure and resulting mechanical responses - Covers the fundamentals, characterization methods, modeling techniques, applications and recent advances of the dynamic behavior of a broad array of materials - Includes insights into manufacturing and processing techniques that enable more effective material design and application
Government Reports Annual Index
Author: Publisher:
ISBN:
Category : Government reports announcements & index
Languages : en
Pages : 1096
Book Description
Ballistics Simulation and Simulation Work and Progress
Author: Michael J. ChinniPublisher:
ISBN:
Category : Science
Languages : en
Pages : 90
Book Description
Research in Progress
Author: Applied mechanics reviews
Author: Government Reports Announcements & Index
Author: Shock Compression of Condensed Matter--1989
Author: American Physical SocietyPublisher: North Holland
ISBN: 9780444882714
Category : Science
Languages : en
Pages : 1050
Book Description
This book presents the most up-to-date collection of research activities in the area of high-pressure shock compression. Current reviews and original research papers are given on theoretical and experimental aspects of high-pressure equations of state, on dynamic plastic response and strength of solids, on numerical simulation and modeling of material response, on fast optical techniques and other advances in experimental technique, on laser-driven shocks, on material modification and shock-induced defects, on geologic and geophysical materials, on dynamic compaction and on modeling and behavior of initiation in energetic materials. Six plenary, 13 invited and 203 research papers are presented.