Download or read book A Laboratory Simulation of Low Velocity Projectile Impact on Thin Plates written by Paul Graham Cartmel and published by . This book was released on 1999 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Investigation of Spray Velocity Resulting from High velocity Penetration of Thin Plates by Disks written by John D. Di Battista and published by . This book was released on 1966 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: An analysis based on one-dimensional shock-wave theory is presented to study the maximum velocity of the spray emanating from the rear surface of a thin meteoroid bumper. A set of experiments was designed to evaluate the analytical results. The targets used were 0.0025-cm-thick 11 aluminum foil and 0.041-cm-thick 1100 H14 aluminum plate. The projectiles used were made of tungsten and were disk shaped, 0.56 cm in diameter, and either 0.076 cm or 0.038 cm in thickness. The target and projectile dimensions used in the experiments insured that the one-dimensional assumptions used in the theory were valid. In addition, using a very dense tungsten projectile to impact the aluminum targets produced aluminum spray velocities well in excess of the tungsten projectile velocity. With this technique, the projectile and target materials were clearly differentiable in the spray. The experiments were conducted in the impact velocity range of 0.089 to 0.295 cm/micronsec. The ratio of maximum target-material spray velocity to projectile impact velocity is defined and is plotted against projectile impact velocity. The ratio predicted by using the theory agrees well with the experimental results in the range of impact velocities investigated. Representative series of photographs are presented and analyzed for the experiments conducted in both thicknesses of aluminum targets.
Download or read book A Peridynamic Simulation of Repeated Projectile Impacts on a Steel Plate written by Jacob Williams and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding multi-projectile impact events is important for a wide range of military and aerospace applications. However, experimental studies in this field remain technologically challenging. In this thesis, simulations of two 20 mm caliber projectiles impacting a steel target above the ballistic limit were performed. Peridynamics, a non-local, particle-based computational method, was used to simulate the impacts. The spacing between the two impacts on target was varied to study the effects on projectile residual velocity, projectile deformation, and fragmentation. To optimize the Peridynamic parameters, the simulation results from a single impact were compared to experimental data available in the literature. Methods to track and quantify the kinetic energy, direction, mass, and velocity of individual fragments, including the projectile post impact, were developed. The size of the fragmentation field, the variation of individual fragments, and the residual velocity of the projectile post impact were studied. From the double impact study, we find increased projectile residual velocity, reduced projectile deformation, and greater variation in the fragmentation field with impacts from a second projectile compared to a single impact. It is observed that the increases in projectile residual velocity and reduction in projectile deformation diminish to near first impact levels as the projectile spacing is increased. The projectile is also found to ricochet in closer spacings causing large velocity components normal to the projectile's flight path and reduced damage to the plate. The overall size of the fragmentation field of double impact cases is found to be similar in size to single impacts, however, the number of fragments produced from the impacts are different. In cases where the second projectile impacted closer to the initial impact, only one fragment was formed, while cases with spacing 1.25 calibers and greater produced more fragments than the initial impact. This thesis proved to be successful in employing Peridynamic theory to study complex impact and fragmentation related problems.
Download or read book Computational and Experimental Simulations in Engineering written by Shaofan Li and published by Springer Nature. This book was released on 2023-11-30 with total page 1435 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers the latest advances, innovations, and applications in the field of computational engineering, as presented by leading international researchers and engineers at the 29th International Conference on Computational & Experimental Engineering and Sciences (ICCES), held in Shenzhen, China on May 26-29, 2023. ICCES covers all aspects of applied sciences and engineering: theoretical, analytical, computational, and experimental studies and solutions of problems in the physical, chemical, biological, mechanical, electrical, and mathematical sciences. As such, the book discusses highly diverse topics, including composites; bioengineering & biomechanics; geotechnical engineering; offshore & arctic engineering; multi-scale & multi-physics fluid engineering; structural integrity & longevity; materials design & simulation; and computer modeling methods in engineering. The contributions, which were selected by means of a rigorous international peer-review process, highlight numerous exciting ideas that will spur novel research directions and foster multidisciplinary collaborations.
Download or read book BALLISTICS 2014 written by Richard G. Ames and published by DEStech Publications, Inc. This book was released on 2014-10-01 with total page 951 pages. Available in PDF, EPUB and Kindle. Book excerpt: Original research from around the world on weapons-grade projectiles, warheads, missiles, guns and their effects on target materialsNew information on shaped charges, fire, control strategies, simulation, blast resistance, non-lethal systems and more190 original presentations in two printed volumes, plus searchable CD The first part of this 2-volume set, part of an ongoing series, presents previously unpublished research on the design and modeling of ballistic devices ranging from shells to missiles, including explosives, propellants and internal components. The second part investigates the effects of ballistic penetrants on a variety of targets, including human models, as well as hard targets and diverse armors made from engineered fibers, ceramics, metal alloys and concrete. Data is included on the modeling and testing of novel devices, explosives and shielding strategies. Papers in this text were presented at a symposium organized by the National Defense Industrial Association with the International Ballistics Society. The CD-ROM displays figures and illustrations in articles in full color along with a title screen and main menu screen. Each user can link to all papers from the Table of Contents and Author Index and also link to papers and front matter by using the global bookmarks which allow navigation of the entire CD-ROM from every article. Search features on the CD-ROM can be by full text including all key words, article title, author name, and session title. The CD-ROM has Autorun feature for Windows 2000 with Service Pack 4 or higher products along with the program for Adobe Acrobat Reader with Search 11.0. One year of technical support is included with your purchase of this product.
Download or read book World Scientific Handbook Of Experimental Results On High Speed Penetration Into Metals Concrete And Soils written by Gabi Ben-dor and published by World Scientific. This book was released on 2016-08-18 with total page 622 pages. Available in PDF, EPUB and Kindle. Book excerpt: This unique compendium contains a vast systematized data of 14,000 experiments on high-velocity penetration into metals, concrete, reinforced concrete, and geological media which were published in the open literature (journal papers, reports, conference proceedings) during the last 70 years. Data presented in this edition are related to the initial and final stages of penetration and include: parameters which characterize mechanical and geometric properties of the striker and the shield; striking and residual velocities of projectile or depth of penetration; changes of mass and size of projectile; angles that determine the initial and residual position of the projectile; ballistic limit velocity; basic characteristics of plug and deformation of the shield.Unified form of data representation and common notations are used throughout the book. All information is presented in numerical form in SI units. The book also contains indices which allow a fast search of the authors' publications and related experiments. Theoreticians, design engineers and experimentalists will find this handbook a valuable reference material.
Download or read book Mechanics of Projectile Impact Against Thin Plates written by Werner Goldsmith and published by . This book was released on 1984 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Comet Halley Micrometeoroid Hazard Workshop written by and published by . This book was released on 1979 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Projectile Shape on Thin Plate Perforation at Normal Incidence written by R. T. Sedgwick and published by . This book was released on 1971 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: Analytical, numerical and experimental results are compared in a systematic investigation of the effects of projectile shaped on thin plate perforation. The analysis of five low velocity impact involving optimal-, ogival-, Russian-, conical- and cylindrical-head projectile comprise the study. A three-way comparison of simple perforation theory predictions, HELP numerical solutions and available experimental data is made for the five problems. The HELP solutions are in excellent agreement with the experimental data. Although the simple perforation formulas are sensitive to projectile shape, they do not provide adequate residual energy predictions. Further numerical studies of this type should provide additional insight into the penetration process and eventually lead to improved perforation formulas. (Author).
Download or read book Laboratory Studies on the Velocity of Fragments from Impact Disruptions written by Akiko M. Nakamura and published by . This book was released on 1993 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government wide Index to Federal Research Development Reports written by and published by . This book was released on 1966 with total page 1336 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 Structures Under Shock and Impact IX written by Norman Jones and published by Wit Transactions on the Built. This book was released on 2006 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text examines the interaction between blast pressure and surface or underground structures, whether the blast is from civilian, military, dust and natural explosions, or any other source.
Download or read book Mechanics of Composite Materials and Structures written by Carlos A. Mota Soares and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt: A compact presentation of the foundations, current state of the art, recent developments and research directions of all essential techniques related to the mechanics of composite materials and structures. Special emphasis is placed on classic and recently developed theories of composite laminated beams, plates and shells, micromechanics, impact and damage analysis, mechanics of textile structural composites, high strain rate testing and non-destructive testing of composite materials and structures. Topics of growing importance are addressed, such as: numerical methods and optimisation, identification and damage monitoring. The latest results are presented on the art of modelling smart composites, optimal design with advanced materials, and industrial applications. Each section of the book is written by internationally recognised experts who have dedicated most of their research work to a particular field. Readership: Postgraduate students, researchers and engineers in the field of composites. Undergraduate students will benefit from the treatment of the foundations of the mechanics of composite materials and structures.
Download or read book An Investigation of Spray Velocity Resulting from High velocity Penetration of Thin Plates by Disks written by John D. Di Battista and published by . This book was released on 1966 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: An analysis based on one-dimensional shock-wave theory is presented to study the maximum velocity of the spray emanating from the rear surface of a thin meteoroid bumper. A set of experiments was designed to evaluate the analytical results. The targets used were 0.0025-cm-thick 11 aluminum foil and 0.041-cm-thick 1100 H14 aluminum plate. The projectiles used were made of tungsten and were disk shaped, 0.56 cm in diameter, and either 0.076 cm or 0.038 cm in thickness. The target and projectile dimensions used in the experiments insured that the one-dimensional assumptions used in the theory were valid. In addition, using a very dense tungsten projectile to impact the aluminum targets produced aluminum spray velocities well in excess of the tungsten projectile velocity. With this technique, the projectile and target materials were clearly differentiable in the spray. The experiments were conducted in the impact velocity range of 0.089 to 0.295 cm/micronsec. The ratio of maximum target-material spray velocity to projectile impact velocity is defined and is plotted against projectile impact velocity. The ratio predicted by using the theory agrees well with the experimental results in the range of impact velocities investigated. Representative series of photographs are presented and analyzed for the experiments conducted in both thicknesses of aluminum targets.
Download or read book Government Reports Index written by and published by . This book was released on 1970 with total page 1344 pages. Available in PDF, EPUB and Kindle. Book excerpt:
