Download or read book Limits of Linear Viscoelastic Behavior Pf an Asphalt Concrete in Tension and Compression written by Robert Louis Alexander and published by . This book was released on 1964 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Comprehensive Evaluation of Small Strain Viscoelastic Behavior of Asphalt Concrete written by B. Shane Underwood and published by . This book was released on 2012 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: Asphalt concrete (AC) is a heterogeneous material affected by viscoelastic and viscoplastic processes, as well as by damage and localized irregularities in the material fabric. However, under specific strain regimens, certain of these mechanisms are less active, and the constitutive relationships of the material can be modeled using simplified mechanistic principles. One simplifying assumption that is typically applied to AC for the purposes of response and performance modeling is that of linear viscoelasticity (LVE). In this paper, the behavior of AC at small strain levels, when LVE models can most accurately describe the constitutive relationship, is described. This work differs from the significant literature presented elsewhere because a more strict definition of the LVE strain regimen has been adhered to. This protocol limits the total peak-to-peak strain amplitude to 50 to 75 microstrains, the tensile strain amplitude to 37.5 microstrains, the total accumulated compressive strain to 1500 microstrains, and the total accumulated tensile strain to 150 microstrains. It is shown that when this stricter protocol is followed, AC exhibits the same fundamental characteristics whether loaded in compression, tension, or indirect tension. Evidence is also presented showing that AC, when compacted by gyratory compaction, does not show anisotropic tendencies at these strain levels. AC shows stress state and strain level dependencies that are inconsistent with rigorous LVE theory. Due to the inconsistencies between the material responses and the theory, the behavior of AC at even the small strain levels used in this research cannot be rigorously referred to as LVE. Further study is needed in order to fully assess the implications of this finding as it relates to day-to-day engineering practice and to the advanced mechanistic modeling of AC materials.
Download or read book Mechanical Behavior of Engineering Materials written by Y.M. Haddad and published by Springer Science & Business Media. This book was released on 2000-08-31 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph consists of two volumes and provides a unified, comprehensive presentation of the important topics pertaining to the understanding and determination of the mechanical behaviour of engineering materials under different regimes of loading. The large subject area is separated into eighteen chapters and four appendices, all self-contained, which give a complete picture and allow a thorough understanding of the current status and future direction of individual topics. Volume I contains eight chapters and three appendices, and concerns itself with the basic concepts pertaining to the entire monograph, together with the response behaviour of engineering materials under static and quasi-static loading. Thus, Volume I is dedicated to the introduction, the basic concepts and principles of the mechanical response of engineering materials, together with the relevant analysis of elastic, elastic-plastic, and viscoelastic behaviour. Volume II consists of ten chapters and one appendix, and concerns itself with the mechanical behaviour of various classes of materials under dynamic loading, together with the effects of local and microstructural phenomena on the response behaviour of the material. Volume II also contains selected topics concerning intelligent material systems, and pattern recognition and classification methodology for the characterization of material response states. The monograph contains a large number of illustrations, numerical examples and solved problems. The majority of chapters also contain a large number of review problems to challenge the reader. The monograph can be used as a textbook in science and engineering, for third and fourth undergraduate levels, as well as for the graduate levels. It is also a definitive reference work for scientists and engineers involved in the production, processing and applications of engineering materials, as well as for other professionals who are involved in the engineering design process.
Download or read book Viscoelastic Properties of Asphalts Based on Penetration and Softening Point written by Boris Radovskiy and published by Springer. This book was released on 2017-11-11 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work deals with conventional and new relationships between various viscoelastic properties of road bitumen, determined under different test modes, such as constant stress, constant deformation or cyclic load. Approximate formulas have been derived for prediction of the rheological properties of asphalt based on its standard parameters such as penetration and softening point. The work is intended for researchers and engineers in road paving industry. It may be also of interest for teachers and Civil Engineering students.
Download or read book Nonlinear Viscoelastic Behaviour of Asphalt Concrete in Stress Relaxation written by and published by . This book was released on 1906 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Asphalt concrete for paving roads is a viscoelastic material. Although a previous study revealed that asphalt concrete has an exceptionally low linear limit so that it behaves nonlinearly in the field, the material is nevertheless assumed to be linear in the practice of pavement design. This research investigates the viscoelastic nonlinearity of asphalt concrete, with emphasis on thermal stress of pavements. This research also deals with the variability of the thermal coefficient of asphalt concrete, a necessary property in predicting, the thermal stress. Based on an extensive review, Schapery's theory for nonlinear viscoelastic materials was selected as the way to best characterize asphalt concrete. A series of direct tensile relaxation tests, on a single type of asphalt concrete, were for the first time conducted at temperatures from 40 to $-$40$\sp\circ$C and at strains up to.0.8% to determine the material properties. A constant-strain-rate test, a Thermal Stress Restrained Specimen Test, and a thermal coefficient test were also conducted for evaluation purposes. Results of the relaxation tests showed that asphalt concrete is nonlinear from the very beginning of being strained. The importance of nonlinearity increases with increasing strain at a decreasing rate and increases with decreasing temperature. The Schapery theory proved capable of characterizing asphalt concrete. It was also found from the test that the thermal coefficient of asphalt concrete is obviously variable, resulting from the nonlinear relationship between temperature and thermal deformation. The effects of the mechanical and thermal nonlinearities on stress predictions were evaluated through three typical problems of interest to engineers.
Download or read book Special Report written by National Research Council (U.S.). Highway Research Board and published by . This book was released on 1971 with total page 636 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Special Report Highway Research Board written by National Research Council (U.S.). Highway Research Board and published by . This book was released on 1971 with total page 802 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monthly Checklist of State Publications written by Library of Congress. Exchange and Gift Division and published by . This book was released on 1965 with total page 922 pages. Available in PDF, EPUB and Kindle. Book excerpt: June and Dec. issues contain listings of periodicals.
Download or read book Proceedings Technical Sessions written by Association of Asphalt Paving Technologists and published by . This book was released on 1965 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Symposium on Rheology written by Andrew W. Marris and published by . This book was released on 1965 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Commencement Programs written by University of California, Berkeley and published by . This book was released on 1962 with total page 1032 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Highway Research Record written by and published by . This book was released on 1968 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book PRO 28 6th International RILEM Symposium on Performance Testing and Evaluation of Bituminous Materials PTEBM 03 written by Manfred N. Partl and published by RILEM Publications. This book was released on 2003 with total page 658 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Viscoelastic and Permanent Deformation Characteristics of Asphalt Aggregate Mixes Tested as Hollow Cylinders and Subjected to Dynamic Axiel and Shear Loads written by Sirous Heydari Alavi and published by . This book was released on 1992 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings Association of Asphalt Paving Technologists Technical Sessions written by Association of Asphalt Paving Technologists and published by . This book was released on 1965 with total page 734 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Asphalt Paving Technology written by Association of Asphalt Paving Technologists and published by . This book was released on 2002 with total page 938 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Highway Research Abstracts written by and published by . This book was released on 1974 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt:
