Download or read book Mechanical Behavior of Sand Subjected to Impact Loading written by Sudheer Sudhakaran Prabhu and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Sand is generally subjected to quasi-static loading in the field. However, for applications involving projectile impacts and surface or mine blasts, sand is subjected to high strain-rate loading. To predict the response of underground structures under these loading conditions, there is a need to accurately understand the high strain-rate response of sand overlaying these structures. Researchers noted that the split Hopkinson pressure bar (SHPB) tests provide reliable data on the high strain-rate response of sand and have been extensively used. SHPB studies on sand showed that the stress-strain response of sand is dependent on the water content of the specimen and the particle breakage of sand grains. Several numerical models have been developed through the years to capture the high strain-rate sand response accurately. However, these models were developed mainly for dry sands, completely saturated sands, and sand with high water contents. These numerical models are unable to capture the softening and subsequent stiffening stress-strain behavior observed in sands at low water contents and low stresses. In this study, SHPB tests of sands are numerically simulated and the equations of state (EOS) at different water contents are calibrated using back calculation. The back-calculated EOSs are used to calibrate a three-phase model capable of capturing the sand response at varying water contents. The response predicted by the three-phase model is validated by comparing the numerical and experimental stress-strain responses. A parametric study was carried out to understand the effect of interface friction and aspect ratio on the validity of the SHPB results by considering different aspect ratios and interface frictions for the specimens. The results iv showed that specimens with higher aspect ratio take longer time to achieve stress equilibrium while specimens with interface friction never attain perfect stress equilibrium. Another important factor that affects the high strain-rate stress-strain response of sand is the particle breakage of sand grains. Due to the difficulty of continuum-scale models in capturing particle breakage in sands, discrete element method (DEM) is used to model high strain-rate loading of sand specimens. The study tries to understand the effectiveness of particle upscaling-downscaling procedure adopted in DEM in modeling high strain-rate problems. In this study, several SHPB tests reported in literature are modeled in DEM with particle breakage introduced in these simulations. The results showed that with well-calibrated parameters for contact behavior and particle crushing, specimens with upscaled particle size distribution (PSD) provide similar dynamic stress-strain response and PSD evolution as those reported in literature. This study shows the importance of particle breakage in the stress-strain response under high stresses as the specimens without particle breakage yield a much stiffer response compared to the specimens with particle breakage. The developed DEM model will be a useful tool to model the complete SHPB test setup as the incident, reflected and transmitted stress waves can be accurately replicated.

Download or read book The Liquefaction Behavior of Sands Subjected to Cyclic Loading written by Karl Rocker and published by . This book was released on 1968 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Vibrations of Soils and Foundations written by Frank Edwin Richart and published by Prentice Hall. This book was released on 1970 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: For graduate students in soil dynamics with a background in statics and elementary dynamics.

Download or read book Mechanical Behavior of a Sand During Incremental Stress Probing written by Khaled Sobhan and published by . This book was released on 1991 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mechanical Behaviour of Engineering Materials written by Joachim Roesler and published by Springer Science & Business Media. This book was released on 2007-10-16 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt: How do engineering materials deform when bearing mechanical loads? To answer this crucial question, the book bridges the gap between continuum mechanics and materials science. The different kinds of material deformation are explained in detail. The book also discusses the physical processes occurring during the deformation of all classes of engineering materials and shows how these materials can be strengthened to meet the design requirements. It provides the knowledge needed in selecting the appropriate engineering material for a certain design problem. This book is both a valuable textbook and a useful reference for graduate students and practising engineers.

Download or read book Advances in Transportation Geotechnics IV written by Erol Tutumluer and published by Springer Nature. This book was released on 2021-08-30 with total page 971 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents selected papers presented during the 4th International Conference on Transportation Geotechnics (ICTG). The papers address the geotechnical challenges in design, construction, maintenance, monitoring, and upgrading of roads, railways, airfields, and harbor facilities and other ground transportation infrastructure with the goal of providing safe, economic, environmental, reliable and sustainable infrastructures. This volume will be of interest to postgraduate students, academics, researchers, and consultants working in the field of civil and transport infrastructure.

Download or read book Dynamic Behavior of Materials Volume 1 written by Bo Song and published by Springer. This book was released on 2014-08-08 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dynamic Behavior of Materials, Volume 1: Proceedings of the 2014 Annual Conference 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: · General Dynamic Materials Response · Novel Dynamic Testing Techniques · Dynamic Fracture and Failure · Dynamic Behavior of Geo-materials · Dynamic Behavior of Composites and Multifunctional materials · Dynamic Behavior of Low-Impedance materials · Dynamic Modeling and Simulation of Dynamic Behavior of Materials · Quantitative Visualization of Dynamic Behavior of Materials · Shock/Blast Loading of Materials · Interface and Structural Dynamics · Material Response

Download or read book Deformation Characteristics of Sand Subjected to Anisotropic Cyclic Dynamic Loading written by David Harold Timmerman and published by . This book was released on 1969 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mechanics of Structures and Materials XXIV written by Hong Hao and published by CRC Press. This book was released on 2019-08-08 with total page 1966 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mechanics of Structures and Materials: Advancements and Challenges is a collection of peer-reviewed papers presented at the 24th Australasian Conference on the Mechanics of Structures and Materials (ACMSM24, Curtin University, Perth, Western Australia, 6-9 December 2016). The contributions from academics, researchers and practising engineers from Australasian, Asia-pacific region and around the world, cover a wide range of topics, including: • Structural mechanics • Computational mechanics • Reinforced and prestressed concrete structures • Steel structures • Composite structures • Civil engineering materials • Fire engineering • Coastal and offshore structures • Dynamic analysis of structures • Structural health monitoring and damage identification • Structural reliability analysis and design • Structural optimization • Fracture and damage mechanics • Soil mechanics and foundation engineering • Pavement materials and technology • Shock and impact loading • Earthquake loading • Traffic and other man-made loadings • Wave and wind loading • Thermal effects • Design codes Mechanics of Structures and Materials: Advancements and Challenges will be of interest to academics and professionals involved in Structural Engineering and Materials Science.

Download or read book Inverse Dynamics Problems written by Hamed Kalhori and published by MDPI. This book was released on 2021-06-15 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: The inverse dynamics problem was developed in order to provide researchers with the state of the art in inverse problems for dynamic and vibrational systems. Contrasted with a forward problem, which solves for the system output in a straightforward manner, an inverse problem searches for the system input through a procedure contaminated with errors and uncertainties. An inverse problem, with a focus on structural dynamics, determines the changes made to the system and estimates the inputs, including forces and moments, to the system, utilizing measurements of structural vibration responses only. With its complex mathematical structure and need for more reliable input estimations, the inverse problem is still a fundamental subject of research among mathematicians and engineering scientists. This book contains 11 articles that touch upon various aspects of inverse dynamic problems.

Download or read book Impact of Sandwich Structures written by Jianxun Zhang and published by Scientific Research Publishing, Inc. USA. This book was released on 2024-03-11 with total page 337 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book focuses on the impact response of lightweight sandwich structures. As a kind of lightweight structure, sandwich structure has been widely used in various engineering fields, such as aerospace, ships, vehicles and so on, because of its high specific stiffness, high specific strength and versatility. During service, the sandwich structures may be subjected to various impact loads, which may result in serious damage, thereby reducing the stiffness, strength and load-bearing ca-pacity, thereby shortening the service life and bringing safety hazards. Therefore, an in-depth understanding of impact behavior and failure mechanisms is of great significance for the wider application of sandwich structures. In the past decades, many scholars have conducted in-depth research on related topics. But it is difficult for readers to systematically read all the literature in a short time. This book seeks to succinctly summarize the development and the results achieved in this field. This book focuses on simple, classical structures, such as beams, plates, and shells, under loads such as low-velocity impact, explosive load, and bullet penetrations. The main research methods are theoretical analysis, numerical simulation and experimental investigation. The purpose is to reveal the deep mechanism and lay a foundation for the application of sandwich structure in engineering practice.

Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1974 with total page 620 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 1994 with total page 836 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Behavior of Sands Under Seismic Loading Conditions written by Marshall L. Silver and published by . This book was released on 1969 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: The volume change characteristics and the dynamic stress-strain properties of dry sand subjected to cyclic shear strains have been investigated and used to check the applicability of a simple method for predicting the vertical settlements due to compaction in layers of dry cohesionless soils subjected to seismic loading conditions. Dynamic testing of a medium quartz sand, performed by repeated load simple shear equipment, indicated that the shear modulus increased slightly with increasing numbers of cycles and with increasing relative density and decreases significantly with increasing values of shear strain amplitude. Modulus values determined near the upper limit of shear strain amplitude that might be expected to be induced by seismic shaking (0.1 percent) were as much as 40 percent lower than modulus values obtained at the lowest values of shear strain that were investigated (0.01 percent). (Author).

Download or read book Mechanical Behaviour of Materials VI written by M. Jono and published by Elsevier. This book was released on 2013-10-22 with total page 3510 pages. Available in PDF, EPUB and Kindle. Book excerpt: Significant progress in the science and technology of the mechanical behaviour of materials has been made in recent years. The greatest strides forward have occurred in the field of advanced materials with high performance, such as ceramics, composite materials, and intermetallic compounds. The Sixth International Conference on Mechanical Behaviour of Materials (ICM-6), taking place in Kyoto, Japan, 29 July - 2 August 1991 addressed these issues. In commemorating the fortieth anniversary of the Japan Society of Materials Science, organised by the Foundation for Advancement of International Science and supported by the Science Council of Japan, the information provided in these proceedings reflects the international nature of the meeting. It provides a valuable account of recent developments and problems in the field of mechanical behaviour of materials.

Download or read book Mechanical Properties of Reid Bedford Model Sand written by Bruce R. Phillips and published by . This book was released on 1986 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report documents (a) the results of laboratory tests performed to supplement data previously reported on Reid-Bedford Model (RB) sand and (b) the results of an analysis of all of the RB laboratory data to develop representative laboratory material properties. The laboratory tests and analysis were conducted for use in evaluating the ability of mathematical constitutive models to simulate the behavior of soils subjected to complex dynamic loadings produced by both explosive- and earthquake-induced ground shock. RB sand is a fine-grained, uniform sand obtained along the Big Black River in Mississippi. The laboratory tests reported consist of consolidated-drained tests and consolidated-undrained tests on saturated sand. The analysis considered the response of the sand under three different test conditions, i.e., unconsolidated-undrained tests on dry sand, consolidated-drained tests on saturated sand, and consolidated-undrained tests on saturated sand. Representative responses of RB sand in terms of uniaxial strains (UX) compressibility; UX stress path; and triaxial compression stress-strain, stress path, and failure are presented for each of the test conditions. (Author).

Download or read book Dynamic Geotechnical Testing II written by Ronald J. Ebelhar and published by ASTM International. This book was released on 1994 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt: