Connolly and others published second order godunov sph for high velocity impact dynamics find, read and cite all the research you need on researchgate. Impact damage and failure response of various aircraft. Pdf analysis of multilayered materials under high velocity. Here, a systematic analysis of a single high density. This compendium of mathematical techniques for the modeling and simulation of high velocity impacts presents the various analytical and experimental aspects of impact dynamics and describes the responses of a variety of materials and structures under impact.
Ansys explicit dynamics and autodyn nonlinear dynamics programs components of ansys workbench model the nonlinear response of solids, fluids and gases and their interactions can be used to study a wide range of events involving impact and blast loadings provide a detailed understanding of the transient dynamics involved. Cameras were positioned perpendicular to the break. It doesnt matter if the behavior is elastic or inelastic, so the impulsemomentum relationship is widely applicable. The images of the highspeed video camera r evealed both the motion of the penetrator and the behavior of fragmented ice pieces with high temporal resolution. Roberts nasa glenn research center, 2 brookpark road, cleveland, oh 445 abstract ballistic impact experiments were performed on triaxially braided polymer. Depending on the impact velocity, relative magnitude of both energies could be different, but they should both be considered in a rigorous analysis of an inelastic impact. High speed thermal imaging on ballistic impact of triaxially. This compendium of mathematical techniques for the modelling and simulation of highvelocity impacts presents the various analytical and experimental aspects of impact dynamics, and. This paper proposes a combined molecular dynamics and material point method approach to simulate the highvelocity impact process. Truscott skip to main content accessibility help we use cookies to distinguish you from other users and to provide you with a better experience on our websites. Remember that the displacement refers to the change in position and the velocity is based upon this position change. High velocity impact welding hviw involves processes like the impact of metal structures and strong fluidstructure interactions with complex phenomena such as interfacial waves and jet generatio.
This approximation is valid for small angles of deflection. Then the eos parameters are adopted in the material point method simulation to model the impact process. This paper proposes a combined molecular dynamics and material point method approach to simulate the high velocity impact process. The effects of high velocity impact to the distal end of 122 human femurs were studied using one. Coverage is extended beyond that of the authors impact dynamics. Highvelocity impact of a liquid droplet on a rigid surface. American institute of aeronautics and astronautics 12700 sunrise valley drive, suite 200 reston, va 201915807 703. In mechanics, an impact is a high force or shock applied over a short time period when two or more bodies collide. Purchase highvelocity impact phenomena 1st edition. Pdf computer modeling of the dynamics of highvelocity. In this paper, deposition of polymer powders was studied numerically for the coldspray deposition technique. High impact velocity an overview sciencedirect topics.
As the fuselage and wings cut through the steel facade of. References to this book structural crashworthiness and failure. Introduction to impact dynamics wiley online library. Numerical study on high velocity impact welding using a. The high velocity impact resistant hvir materials are used for body armor such as coats, impact resistant shields, and helmets in the defense sector for selfprotection of soldiers from the enemy. The dam age mechanics methodology must hence be based on a. Numerical simulations of the highvelocity impact of a single. Highvelocity projectile impact induced 9r phase in ultrafine. Isbn shop our inventory for high velocity impact dynamics by jones a. High velocity impacts due to bird strike, tyre debris and other foreign object damage are critical safety issues. Although the impact force varies with time, an average or effective force feff can be assumed which acts over the impact duration. The bird strike on low flying aircraft is another situation where the high velocity impact occurs in aircraft structures. Numerical simulation of high velocity impacts on thin metallic. This paper presents the dynamic response of structures under high velocity impact loading using smooth particle hydrodynamics sph approach.
Since 2003, speeding has been a factor of nearly onethird of crash deaths. Bone fractures produced by high velocity impacts huelke. Molecular dynamics simulations reveal the formation mechanisms of the 9r phase in aluminium. Zukas with fast free shipping on every used book we have in stock. A multiscale framework for highvelocity impact process with. Pdf finite element modelling of high velocity impact on plate. Visualization of highspeed impact of penetrator into icy target. A computational study of highspeed droplet impact 331 where u is the velocity vector, e is the total energy and i is the identity tensor. Under high velocity impact, the deformation response of the. The highvelocity impactresistant hvir materials are used for body armor such as coats. However, when a yaw is impact induced and the resulting. Abacusexplicit are required to reduce certification and. Aug 18, 2019 high velocity impact dynamics edited by jonas a.
High velocity impact dynamic is a discipline that highly depends on experiments. Such a force or acceleration usually has a greater effect than a lower force applied over. Polymer nanocomposites for highvelocity impact applications. Fluid dynamics simulation of high speed jet under distinct. Impact dynamics by zukas abebooks passion for books. High velocity impact dynamics high velocity impact dynamics by jonas a. The fracture process is implicit within the stressstrain relationship for the composite material. Nov 21, 2017 molecular dynamics simulations reveal the formation mechanisms of the 9r phase in aluminium. High velocity impact dynamics 1990 edition open library. The aim of this study is to execute the fluid dynamics simulation of high speed jet under distinct input velocities i. Given an initial position and velocity of the the initial conditions of the body. In effect tne colliding solids can be treated as fluids in the early stages of impact.
The deformation and heating upon impact have been shown to be enough to result in particle deposition and adhesion even without melting the particle. Gelatine cavity dynamics of high speed sphere impact volume 880 akihito kiyama, mohammad m. The first concern the crash simulation of a generic airplane. Computer modeling of the dynamics of highvelocity impact and accompanying physical phenomena article pdf available in russian physics journal 358. The bird strike on low flying aircraft is another situation where the highvelocity impact occurs in aircraft structures. Coverage is extended beyond that of the authors impact dynamics and deals with new topics in impacts involving inert materials, including the dynamic response to energetic and inert materials.
Impact mechanics and highenergy absorbing materials. Isbn 9780471514442 this compendium of mathematical techniques for the modeling and simulation of highvelocity impacts presents the various analytical. The number of impacts achieved of assumption 5, the angle of incidence will equal the angle in a given time interval e. Me 230 kinematics and dynamics university of washington. Remember that the displacement refers to the change in position and the velocity is based upon this. High velocity impact of solid objects on nonnewtonian fluids. The board was also used to provide a secondary estimate of impact velocity via highspeed video hsv. Pdf impact dynamics of a supercavitating underwater. This site is like a library, use search box in the widget to get ebook that you want. High speed thermal imaging on ballistic impact of triaxially braided composites joel p. Although the impact force varies with time, an average or.
Silberschmidt, computational and exeperimental mechanics of. Highvelocity impact of solid objects on nonnewtonian fluids. In cold spray, a solid particle is impacted on a substrate at high velocity. The effect depends critically on the relative velocity of the bodies to one another. In this paper, the dynamic responses of structures under high velocity impact using smooth particle hydrodynamics sph approach is presented. Pmc can be highly strain rate dependent and nonlinear. This compendium of mathematical techniques for the. Multilayer armor containing ceramic and metallic layers has become more common in the past two decades. This compendium of mathematical techniques for the modelling and simulation of high velocity impacts presents the various analytical and experimental aspects of impact dynamics, and describes the responses of a variety of materials and structures under impact.
Apr 17, 2020 high velocity impact dynamics edited by jonas a. May 10, 2014 high velocity impact dynamics high velocity impact dynamics by jonas a. Isbn 9780471514442 this compendium of mathematical techniques for the modeling and simulation of high velocity impacts presents the various analytical and experimental aspects of impact dynamics and describes the responses of a variety of materials. All this is not meant to discourage you from the use of structural dynamics or wave. Highvelocity impact of solid objects on nonnewtonian. Typically, ceramics have high compressive strength. High velocity impact dynamic response of structures using sph method article pdf available in international journal of computational engineering science 502. Given an initial position and velocity of the tail, a series of impacts and reflections will occur. The field of highvelocity impact has been a subject of many research efforts for. The eos data are first obtained from a series of molecular dynamics computations, and the parameters are fitted. Pdf high velocity impact dynamic response of structures using. In particular, this study focuses on the impact velocity and velocity of twophase flow gasliquid.
However, when a yaw is impact induced and the resulting yaw velocity is high, the rotational component of the vehicles kinetic energy can be significant relative to the translational component. Numerical simulations of high velocity impact phenomena in two dimensions have been performed routinely for a number of years. In effect tne colliding solids can be treated as fluids in the early. In the lower velocity range, a drill hole fracture was produced with low energy expenditure, and the diameter of this type of fracture was. References to this book structural crashworthiness and zumas mader. Pdf high velocity impact dynamic response of structures.
Chapter 1 dynamic behavior of materials and structures. However, since her displacement is 0 meters, her average velocity is 0 ms. Coverage is extended beyond that of the authors impact dynamics and deals with new topics in impacts involving inert materials. A multiscale framework for highvelocity impact process. High velocity impact dynamics download ebook pdf, epub. At each impact, in view of assumption 5, the angle of incidence will equal the angle of reflection. Gelatine cavity dynamics of highspeed sphere impact. Impact dynamics of a supercavitating underwater projectile. Such a force or acceleration usually has a greater effect than a lower force applied over a proportionally longer period. Flows in one and two dimensions with and without azimuthal.
Gelatine cavity dynamics of highspeed sphere impact volume 880 akihito kiyama, mohammad m. The external columns were impacted at a very high speed and the process is controlled mainly by local inertia. Jul 05, 2019 high velocity impact dynamicsjedited by jonas a. High velocity impact dynamics and a great selection of related books, art and collectibles available now at. To enrich our knowledge about the penetration dynamics into the icy target, visualization is apparently the most powerful tool. It might help our understanding of dynamic phenomena in mechanics a bit if we. In this case of the teachers motion, there is a position change of 0 meters and thus an average velocity of 0 ms. This compendium of mathematical techniques for the modeling and simulation of highvelocity impacts presents the various analytical and experimental aspects of impact dynamics and describes the.
427 317 339 673 1281 343 232 558 894 1370 561 476 220 259 755 1533 771 1108 1209 184 770 971 153 392 110 1605 1299 1431 423 580 745 1227 474 578 1254 878 490 199 47 1458 993 619