Download or read book Experimental and numerical analysis of fracture processes in concrete written by Erik Schlangen and published by . This book was released on 1993 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fracture Processes of Concrete written by Jan G.M. van Mier and published by CRC Press. This book was released on 2017-07-14 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: Despite tremendous advances made in fracture mechanics of concrete in recent years, very little information has been available on the nature of fracture processes and on reliable test methods for determining parameters for the different models. Moreover, most texts on this topic discuss numerical modeling but fail to consider experimentation. This book fills these gaps and synthesizes progress in the field in a simple, straightforward manner geared to practical applications.
Download or read book Fracture Processes of Concrete written by Jan G.M. van Mier and published by CRC Press. This book was released on 1996-12-20 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: Despite tremendous advances made in fracture mechanics of concrete in recent years, very little information has been available on the nature of fracture processes and on reliable test methods for determining parameters for the different models. Moreover, most texts on this topic discuss numerical modeling but fail to consider experimentation. This book fills these gaps and synthesizes progress in the field in a simple, straightforward manner geared to practical applications.
Download or read book Hybrid Experimental numerical Analysis and Finite Element Modeling of Fracture of Aggregate Composite written by Sean He and published by . This book was released on 1993 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental and numerical study of mixed mode fracture in concrete written by and published by . This book was released on 2006 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fracture mechanics of concrete Structural application and numerical calculation written by George C. Sih and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 289 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concrete has traditionally been known as a material used widely in the construction of roads, bridges and buildings. Since cost effectiveness has always been one of the more important aspects of design, concrete, when reinforced and/or prestressed, is finding more use in other areas of application such as floating marine structures, storage tanks, nuclear vessel containments and a host of other structures. Because of the demand for concrete to operate under different loading and environmen tal conditions, increasing attention has been paid to study concrete specimens and structure behavior. A subject of major concern is how the localized segregation of the constituents in concrete would affect its global behavior. The degree of nonhomogeneity due to material property and damage. by yielding and/or cracking depends on the size scale and loading rate under consideration. Segregation or clustering of aggregates at the macroscopic level will affect specimen behavior to a larger degree than it would to a large structure such as a dam. Hence, a knowledge of concrete behavior over a wide range of scale is desired. The parameters governing micro-and macro-cracking and the techniques for evaluating and observing the damage in concrete need to be better understood. This volume is intended to be an attempt in this direction. The application of Linear Elastic Fracture Mechanics to concrete is discussed in several of the chapters.
Download or read book Continuous and Discontinuous Modelling of Fracture in Concrete Using FEM written by Jacek Tejchman and published by Springer Science & Business Media. This book was released on 2012-07-28 with total page 417 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book analyzes a quasi-static fracture process in concrete and reinforced concrete by means of constitutive models formulated within continuum mechanics. A continuous and discontinuous modelling approach was used. Using a continuous approach, numerical analyses were performed using a finite element method and four different enhanced continuum models: isotropic elasto-plastic, isotropic damage and anisotropic smeared crack one. The models were equipped with a characteristic length of micro-structure by means of a non-local and a second-gradient theory. So they could properly describe the formation of localized zones with a certain thickness and spacing and a related deterministic size effect. Using a discontinuous FE approach, numerical results of cracks using a cohesive crack model and XFEM were presented which were also properly regularized. Finite element analyses were performed with concrete elements under monotonic uniaxial compression, uniaxial tension, bending and shear-extension. Concrete beams under cyclic loading were also simulated using a coupled elasto-plastic-damage approach. Numerical simulations were performed at macro- and meso-level of concrete. A stochastic and deterministic size effect was carefully investigated. In the case of reinforced concrete specimens, FE calculations were carried out with bars, slender and short beams, columns, corbels and tanks. Tensile and shear failure mechanisms were studied. Numerical results were compared with results from corresponding own and known in the scientific literature laboratory and full-scale tests.
Download or read book Concrete Fracture written by Jan G.M. van Mier and published by CRC Press. This book was released on 2012-10-25 with total page 383 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of fracture mechanics of concrete has developed in recent years to the point where it can be used for assessing the durability of concrete structures and for the development of new concrete materials. The last decade has seen a gradual shift of interest toward fracture studies at increasingly smaller sizes and scales. Concrete Fracture: A Multiscale Approach explores fracture properties of cement and concrete based on their actual material structure. Concrete is a complex hierarchical material, containing material structural elements spanning scales from the nano- to micro- and meso-level. Therefore, multi-scale approaches are essential for a better understanding of mechanical properties and fracture in particular. This volume includes various examples of fracture analyses at the micro- and meso-level. The book presents models accompanied by reliable experiments and explains how these experiments are performed. It also provides numerous examples of test methods and requirements for evaluating quasi-brittle materials. More importantly, it proposes a new modeling approach based on multiscale interaction potential and examines the related experimental challenges facing research engineers and building professionals. The book’s comprehensive coverage is poised to encourage new initiatives for overcoming the difficulties encountered when performing fracture experiments on cement at the micro-size/scale and smaller. The author demonstrates how the obtained results can fit into the larger picture of the material science of concrete—particularly the design of new high-performance concrete materials which can be put to good use in the development of efficient and durable structures.
Download or read book The Combined Finite Discrete Element Method written by Antonio A. Munjiza and published by John Wiley & Sons. This book was released on 2004-04-21 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: The combined finite discrete element method is a relatively new computational tool aimed at problems involving static and / or dynamic behaviour of systems involving a large number of solid deformable bodies. Such problems include fragmentation using explosives (e.g rock blasting), impacts, demolition (collapsing buildings), blast loads, digging and loading processes, and powder technology. The combined finite-discrete element method - a natural extension of both discrete and finite element methods - allows researchers to model problems involving the deformability of either one solid body, a large number of bodies, or a solid body which fragments (e.g. in rock blasting applications a more or less intact rock mass is transformed into a pile of solid rock fragments of different sizes, which interact with each other). The topic is gaining in importance, and is at the forefront of some of the current efforts in computational modeling of the failure of solids. * Accompanying source codes plus input and output files available on the Internet * Important applications such as mining engineering, rock blasting and petroleum engineering * Includes practical examples of applications areas Essential reading for postgraduates, researchers and software engineers working in mechanical engineering.
Download or read book Fracture Mechanics of Concrete Structures written by Z.P. Bazant and published by CRC Press. This book was released on 2003-10-04 with total page 1022 pages. Available in PDF, EPUB and Kindle. Book excerpt: This conference is the first in a series of conferences dedicated to Fracture Mechanics of Concrete Structures. Due to the recent explosion of interest in research on fracture in concrete, the conference has brought together the world's leading researchers in fracture of concrete and this book contains the proceedings.
Download or read book Numerical Methods in Fracture Mechanics written by D. R. J. Owen and published by . This book was released on 1980 with total page 840 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Numerical Analysis of Cracking in Concrete Pavements Subjected to Wheel Load and Thermal Curling written by Temesgen W. Aure and published by . This book was released on 2013 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main goal of this research is to implement recent advances in nonlinear fracture mechanics, most notably the introduction of the cohesive zone concept, in investigating the post-cracking behavior of concrete pavements, subjected to wheel load and curling. The cohesive zone is assumed to lie along a specified direction known a priori, and cohesive elements are inserted along this path. The study follows a step-by-step approach, beginning with fracture analysis of simply supported beams. In this initial step, experimental and numerical studies available in literature are reproduced and excellent agreement is observed. Furthermore, important fracture parameters and numerical challenges are identified, pertinent to the cohesive zone concept. It is observed that post-crack responses of the beams are sensitive to choices regarding the solution type, the concrete softening curve, and the uncracked region mesh sizes. Single slabs-on-grade under wheel loads located at the slab edge or interior are considered next. In this phase, it is observed that the increased size of the problem inhibits generating as refined mesh as for the beams, and consequently obtaining a convergent solution poses a significant challenge. This is resolved by using so-called viscous regularization, in which a small viscosity term is introduced. Accordingly, a small deviation of traction stresses beyond the pre-defined material softening curve can be tolerated. Once again, the simulation in this phase is verified by reproducing experimental and numerical results available in literature. The effects of concrete softening curve, cohesive zone mesh, solution method, fracture energy, and tensile strength on the fracture process are investigated. It is observed that the fracture energy is the major parameter that influences the responses. In a third phase of the study, a single slab-on-grade is subjected to wheel load and curling, individually or in combination. In both cases, it is observed that the diurnal temperature cycle and the shape of its profile through the slab thickness plays a significant role on the post-crack responses of the slab. When the slab top is warmer, unstable cracks form; in contrast, a warmer bottom results in stable cracks, thereby increasing the resistance of the slab and avoiding sudden failure. The final two phases of the research are devoted to the study of jointed concrete pavements, also subjected to wheel load and temperature variations: the fourth phase encompasses aggregate interlock joints and the fifth phase pertains to dowel bar joints. Linear and nonlinear aggregate interlock mechanisms are simulated and their repercussions on the fracture responses of the slabs are examined. Similarly, the effects of numerical idealization techniques for the dowel-slab interaction, joint size and dowel looseness on the fracture process are examined. It is concluded that the cohesive zone approach is a very promising tool in the ongoing exploration of fracture behavior in concrete pavements. The techniques can be extended to general loading situations that involve fatigue and crack branching. The results from this study will contribute to the development of a more mechanistic failure analysis of concrete pavements.
Download or read book IUTAM Symposium on Analytical and Computational Fracture Mechanics of Non Homogeneous Materials written by B.L. Karihaloo and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 509 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume constitutes the Proceedings of the IUTAM Symposium on "Analytical and Computational Fracture Mechanics of Non-homogeneous Materials", held in Cardiff from 18th to 22nd June 2001. The Symposium was convened to address and place on record topical issues in analytical and computational aspects of the fracture of non-homogeneous materials as they are approached by specialists in mechanics, materials science and related fields. The expertise represented in the Symposium was accordingly very wide, and many of the world's greatest authorities in their respective fields participated. Given the extensive range and scale of non-homogeneous materials, it had to be focussed to enhance the quality and impact of the Symposium. The range of non-homogeneous materials was limited to those that are inhomogeneous at the macroscopic level and/or exhibit strain softening. The issues of micro to macro scaling were not excluded even within this restricted range which covered materials such as rock, concrete, ceramics and composites on the one hand, and, on the other, those metallic materials whose ductile fracture is strongly influenced by the presence of inhomogeneities. The Symposium remained focussed on fundamental research issues of practical significance. These issues have many common features among seemingly disparate non-homogeneous materials.
Download or read book Fracture and Damage in Quasibrittle Structures written by Z.P. Bazant and published by CRC Press. This book was released on 2004-01-14 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding of failure of quasibrittle materials is of paramount importance in many engineering fields. This subject has become a broad and important field of considerable mathematical complexity, with many competing models and unsolved problems. Attention in this volume focuses on concrete, rock, masonry, toughened ceramics, ice and other quasibrittle materials characterized by the development of large zones of cracking or other microstructural damage, and its localization into major fractures.
Download or read book Computational Fracture Mechanics in Concrete Technology written by Alberto Carpinteri and published by Computational Mechanics. This book was released on 1999 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bringing together the latest research on fracture of rocks, this state-of-the-art volume covers a wide range of subjects including hydraulic fracturing, blasting and fragmentation, transport problems and creep.
Download or read book DIANA Computational Mechanics 94 written by Ger M.A. Kusters and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 405 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in computational mechanics can only be achieved on the basis of fruitful discussion between researchers and practising engineers. This has been achieved in the present publication, which contains all the papers presented at the first International DIANA Conference on Computational Mechanics. Nearly all papers show the results of calculations achieved with the DIANATM Finite Element System. Broadly, the book follows the line of research from the material level, via the element level, to the structural level. But it should be emphasised that much current research passes from one level to the other, and such an interaction is also reflected here. The following domains are treated: (hyper)elasticity, (visco)plasticity and cracking; (enriched) damaging continua models; material experiments vs. computational models; stochastic approaches; fluid--structure interactions; element technology; geometrical nonlinearity and structural instability; nonlinear dynamics; solution procedures.
Download or read book Damage and Fracture of Disordered Materials written by Dusan Krajcinovic and published by Springer. This book was released on 2014-05-04 with total page 265 pages. Available in PDF, EPUB and Kindle. Book excerpt: The principal objective of this book is to relate the random distributions of defects and material strength on the microscopic scale with the deformation and residual strength of materials on the macroscopic scale. To reach this goal the authors considered experimental, analytical and computational models on atomic, microscopic and macroscopic scales.
