Download or read book Nondestructive Evaluation of Wood Utility Poles written by Jozsef Bodig and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nondestructuve Evaluation of Wood Utility Poles written by J. Bodig and published by . This book was released on 1988 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Longitudinal Nondestructive Evaluation of New Wood Utility Poles written by Ronald W. Anthony and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Non destructive Evaluation of Wood Utility Poles Using Computed Axial Tomography Imaging written by Howard David Thomas and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Of the more than 130 million wooden utility poles in service, there are approximately 2 million that are replaced annually. A quick, yet accurate non-destructive method of evaluation of the in-service poles could provide substantial savings by reducing both the number of replacements and the number of failures. Research has been conducted to determine the possible use of Computerized Axial Tomography or CAT Imaging for pole evaluation. This involved correlating actual physical strengths determined by destructive testing with predicted strengths that were calculated using basic laws of material behavior and the cross-sectional scan image of wood density values that were measured using the prototype CAT scanner. The statistical analysis of the correlation between the measured and predicted strengths used a data set of 31 pole specimens. A predictive model was developed assuming several different relationships between wood density and the assumed stress vs. strain diagrams. The predictive model also made adjustments for areas of decay and the average moisture content of the wood specimens. The most accurate predictive model developed had average error of estimate of approximately 24% and a coefficient of variation for the difference between the measured and predicted values of approximately 21%.
Download or read book Nondestructive Evaluation Testing and Procedures for Restoration and Replacement of Wooden Utility Poles written by Lam Tich Ma and published by . This book was released on 1993 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Longitudinal Nondestructive Evaluation of New Utility Wood Poles written by and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nondestructive Evaluation of Wood written by Forest Service (U S ) and published by Government Printing Office. This book was released on 2015 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nature's engineering of wood through genetics, wind, and weather creates a wide variability in wood as a material. Consequently, manufacture and users of wood products are frequently frustrated in dealing with the forest resource. Manufacturers sometimes argue that wood is difficult to consistently process into quality products because of the wide range of properties that exist in this raw material. Users of wood products can be equally frustrated with the performance variability found in finished products. Nondestructive evaluation (NDE) technologies have contributed significantly toward eliminating the cause of these frustrations. NDE technologies have been developed and are currently used in lumber and veneer grading programs that result in engineered materials that have consistent well-defined performance characteristics. This brief volume explores some of the processes that are used to manufacture wood, including green wood technology and provides a bit of history to wood production and its uses too. Other products that may interest you from the US Forest Service can be found at this link: https://bookstore.gpo.gov/agency/819
Download or read book Nondestructive Testing of Wood Utility Poles Using a Sonic Test Device written by Robert H. Falk and published by . This book was released on 1983 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nondestructive Strength Classification of New Wood Utility Poles written by and published by . This book was released on 1994 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper provides information on the latest developments in nondestructive strength classification of new wood utility poles, including the ability to predict pole tip-load capacity with a higher accuracy than is possible with the currently used visual grading method using the the developed nondestructive evaluation (NDE) method and the proposed strength classification approach.
Download or read book A Nondestructive Evaluation Technique for Wood Poles written by D. E. Franklin and published by Canadian Electrical Association. This book was released on 1985 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Non destructive Testing NDT Methods for Wood Power Poles written by Melisa Nallar and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scanning Nondestructive Evaluation of Wood Poles written by Egon R. H. Teodorson and published by . This book was released on 1983 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Further Development of a Nondestructive Evaluation Technique for Wood Poles Phase II written by C. J. Fingler and published by Montréal : Canadian Electrical Association. This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Non Destructive Testing And Evaluation For Manufacturing And Construction written by H. Dos Reis and published by CRC Press. This book was released on 1989-12-01 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt: Exploring advances and strengthening communications among researchers in manufacturing and construction technologies, this book covers nondestructive testing and evaluation methods. Drawing on a wide range of experts, it provides insights from every sector of the field. Based on a three-day conference titled "Nondestructive Testing and Evaluation for Manufacturing and Construction" held on the campus of the University of Illinois at Urbana-Champaign, the papers presented in the book foster development of new and innovative methods.
Download or read book Nondestructive Testing for Assessing Wood Members in Structures written by Robert Jon Ross and published by . This book was released on 1994 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of a Vibration based Non destructive Testing Method for In service Utility Poles written by Mohammadhadi Jalali Nodoushan and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Wooden utility poles for electric networks are widely used, with approximately two million poles in North America. A reliable and cost-effective non-destructive testing (NDT) method is necessary for strength evaluation during the life span of the poles. To improve an emerging modal testing-based NDT method, this thesis develops a novel method to measure natural frequencies and damping ratios of poles even though they are connected to conductors. This thesis makes contributions to the wood pole NDT state of the art in two major areas - analytical and numerical modeling of pole-cable systems, and frequency-domain decoupling methods to identify pole properties despite their connection to cables. Improved analytical models of the "cable-beam" system were developed in order to understand the coupled vibration behavior of the system. Bending stiffness and sag of the cable were considered in the modeling and the effects of them on vibration behavior of the system was studied. Two-dimensional and three-dimensional dynamic models using bond graph method were developed for vibration of stranded cables and vibration of the cable-beam system. The models were verified by experiments in free and forced vibration. The second contribution area is the development of substructure decoupling-related methods to decouple the beam frequency response function (FRF) from the assembled cable-beam system. The FRF of the beam was obtained as an independent substructure after decoupling analysis and the FRF was compared to the directly measured FRF from modal testing of the beam substructure. A good agreement showed that the substructure decoupling method can be used to filter out the effects of cables from the assembled system in cabled structures, assuming that all points in the system are accessible for measurement. An FRF-based finite element model updating was then developed to overcome the practical limitation of accessing some measurement points in the field. The FRFs of accessible points were used as a basis for updating the FE model and then the FRFs of inaccessible points were obtained from the updated (optimized) FE model. A substructural damage detection was also developed for the systems that consist of a few substructures but only the main (target) substructure is susceptible to damage. In the developed method, FRF of the main substructure is first obtained using the substructure decoupling method and then FRF-based finite element model updating is used for damage detection, localization and quantification. The method was successfully able to identify location and magnitude of damage, which was modeled as a localized reduced stiffness due to material degradation or cracking. Finally, in support of the larger ongoing NDT research project, full-scale pole modal testing was done in the field. In-ground pole FRF's with and without cables were generated, for future use in model validation. In-ground poles without cables were subjected to modal testing, and then brought to the lab for modal and destructive testing. The differences in the resulting FRF's allow future simulation-based prediction of the foundation properties, and the destructive tests have added to the research group's database for correlation of modal properties and pole strength.
Download or read book Proceedings written by and published by . This book was released on 1988 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
