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Wednesday, November 11, 2020 | History

2 edition of Nondestructive testing methods to predict effect of degradation on wood found in the catalog.

Nondestructive testing methods to predict effect of degradation on wood

J. Kaiserlik

Nondestructive testing methods to predict effect of degradation on wood

a critical assessment

by J. Kaiserlik

  • 141 Want to read
  • 9 Currently reading

Published by Dept. of Agriculture, Forest Service, Forest Products Laboratory in [Madison, Wis.] .
Written in English

    Subjects:
  • Wood -- Deterioration,
  • Wood -- Standards

  • Edition Notes

    Statementby J. Kaiserlik
    SeriesGeneral technical report FPL -- 19
    ContributionsForest Products Laboratory (U.S.)
    The Physical Object
    Pagination[53] p. :
    Number of Pages53
    ID Numbers
    Open LibraryOL13603208M

      Jiang J, Li J, Hu J, Fan D: Effect of nitrogen phosphorus flame retardants on thermal degradation of wood. Construction and Building Materials , – .   This book raises many questions but also helps to find answers. The following aspects of weathering and degradation are extensively discussed in the book: effect on materials, and methods.


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Nondestructive testing methods to predict effect of degradation on wood by J. Kaiserlik Download PDF EPUB FB2

Results are reported for an assessment of methods for predicting strength of wood, wood-based, or related material. nondestructive strength prediction was very limited. In wood, strength multiparameter "degradation models." application to wood include spectral response and techniques Cited by: 6.

CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Results are reported for an assessment of methods for predicting strength of wood, wood-based, or related material.

nondestructive strength prediction was very limited. In wood, strength multiparameter "degradation models." application to wood. DTIC ADA Nondestructive Testing Methods to Predict Effect on Degradation of Wood: A Critical Assessment. Item Preview. Nondestructive Testing and Evaluation of Wood Symposium Series The objective of this book is the same as that of the first edition—to serve as a primary reference on non-destructive evaluation of wood.

Sections of the book Cited by: 3. Studies using nondestructive evaluations have been used for in-place detection of decay in wood structures such as bridges, grandstands, piers and laminated arches.

We have prepared a comprehensive report that reviews nondestruc- tive testing of wood research and application techniques. Non-destructive testing (NDT) for health monitoring of trees is a suitable candidate for detecting signs of early decay [1]. Recent developments [2,3,4] have highlighted that ground-penetrating.

Acoustic NDT techniques appear to be relatively fast and affordable in-situ measuring methods, which have been already used to estimate wood properties in many cases (Sandoz et al. To help interpret the behavior of a complex material such as wood, a novelty of this study lies not only in combining ultrasonic and sclerometric nondestructive testing (NDT) methods so as to reduce measurement errors, but also in framing the outcomes from mechanical tests.

A few case studies highlighting the importance of non-destructive testing and evaluation for structural integrity assessment are also discussed based on the investigations carried out at the.

The 28th British Conference on NDT, the annual conference of The British Institute of Non-Destructive Testing, was held in Sheffield, UK, September Its theme was the impact of NDT, and it. Field methods for rapid determination of wood density in trees have evolved from increment borer, torsiometer, Pilodyn, and nail withdrawal into sophisticated electronic tools of resistance drilling measurement.

A partial resistance drilling approach coupled with knowledge of internal tree density distribution may offer an alternative solution for wood. The best model for predicting wood density presented R²cv of and RMSEcv of 15 kg.

m-³ ABSTRACT The objective of this study was to establish multivariate models for the prediction of wood. To help interpret the behavior of a complex material such as wood, a novelty of this study lies not only in combining ultrasonic and sclerometric nondestructive testing (NDT) methods so as to reduce.

By definition Nondestructive Testing (NDT) is the science of identifying physical and mechanical properties or defects of a piece of material or structure, without altering its end use capabilities. The NDT methods used in the forest products industry can be classified to the following groups: 1.) Defect detection.

Kaiserlik, J.: Nondestructive testing methods to predict effect of degradation on wood: A critical assessment. GTR-FPL, Gen. Tech. Rep. FPL US Department of Agriculture, Forest Service.

The procedure that utilizes the results of both described NDT methods was developed for improved methodology to assess tube condition and to predict its remaining life.

* Corresponding. The method of visual stress grading for sawn coniferous timber presently in force in the German Federal Republic is too complicated for practical use. Nondestructive testing methods to predict effect of degradation on wood.

Non-Destructive Testing (NDT) is a method proposed in the material studies to determine the physical and mechanical properties of a material without altering its end-use capabilities.

This paper reports the investigation made the bending strength properties of timber beams using ultrasonic wave non-destructive test method. Differences in terminology exist in the literature on acoustic methods applied to the nondestructive testing of wood.

several names, such as sonic stress waves, ultrasonic stress waves, ultrasonics, and ultrasonic pulse methods, these methods rely on the theory of acoustic wave propagation.

Developments in the Research on Nondestructive testing of wood-based Materials in China InShi, Yin and Ruan measured the sound velocities in wood using the sound pulse method. The mechanical strength test of wood. The main issue of wood is its sensitivity to Relative Humidity (RH) variations, affecting its dimensional stability, and thus leading to crack formations and propagations.

In situ structural health monitoring. Degradation analysis is an important data analysis technique for projecting failure data from the degradation history of a quality or performance characteristic that is associated with the reliability of a product. This approach typically requires that the degradation be measured for multiple units over time.

However, in some cases, destructive testing is necessary to obtain degradation. The choice of an appropriate NDT method or methods depends not only on the geometry and the material characteristics of the structures, but also on the anomalies that have to be detected [1].

This. The first test set of structural elements is made of steel fiber-reinforced concrete. The elements are evaluated using NDT methods and for comparison by destructive laboratory methods. The second part is the impact of structures using explosion and evaluation of the condition of structures using NDT methods.

Mechanical Testing, Nondestructive Testing and Microscopy. Wood Science Consulting houses a state of the art Tinius Olsen bench-top test machine, an Olympus light microscope with digital imaging, and a Resistograph for nondestructive testing.

All applicable industry standards are followed for mechanical testing, the determination of design values and for the inspection of wood and wood. This chapter will concentrate on the decay and weathering effects on the degradation of cellulose-reinforced fibers composites.

The book chapter also summarizes some points regarding the effects of biocomposite products on the decay and natural weathering properties that are analyzed to find out the effects. Nondestructive testing method.

Helms, D. and Niemz, P., (New Applications of the Drill Resistance Method for Quality Evaluation of Wood and Wood Products,)> Proceedings of the 9th International Symposium on Nondestructive Testing of Wood. Based on nondestructive testing data, this paper proposed a method for predicting the Ed of larch using the principle of information diffusion.

It selected the distance (D) from the bark to the pith in the cross-section of the wood and the height (H) from the base to the top in the radial section of the wood.

Several nondestructive evaluation methods were attempted for the estimation of the creep damage of degraded Cr-1Mo steel. The specimens of three different aging periods were prepared by an isothermal heat treatment at °C, °C, and °C.

The effect of probe configuration on the electrical resistivity was studied. Single configuration method and dual-configuration method. The paper deals with the problem of applicability of the metal magnetic memory (MMM) technique in the crane structural inspection and monitoring.

The MMM method does not require the external magnetization of a structure that results in reduction of downtime of maintenance operations. Measurement of the intensity of the self-magnetic leakage signal can be an alternative to other non-destructive.

Condition assessment and characterization of materials and structures by means of nondestructive testing (NDT) methods is a priority need around the world to meet the challenges associated with the. "Nondestructive Testing Methods to Predict Effect of Degradation on Wood, a Critical Assessment." USDA Forest Service General Technical Report FPL Forest Products Laboratory, Madison, Wisconsin.

Neal, D.W. "Establishment of Elastic Properties for In-Place Structures." Proceedings of the Fifth Nondestructive Testing of Wood. The field of nondestructive testing and evaluation of materials is constantly evolving. This is especially true in the wood and fiber based materials area.

For example, early research on nondestructive testing and evaluation technologies for wood products focused on methods. The American Society for Testing and Materials defines fatigue life, N f, as the number of stress cycles of a specified character that a specimen sustains before failure of a specified nature occurs.

For some. ASTM's nondestructive testing standards provide guides for the appropriate methods and techniques used to detect and evaluate flaws in materials and objects without destroying the specimen at hand.

In this study, viscoelastic properties of polymeric composites were investigated through a non-destructive test (NDT) method based on longitudinal free vibration. First, three different polyester composites reinforced separately with carbon, glass, and hemp fibers, as well as, one polyester composite sample reinforced with poplar wood.

Nondestructive Testing and Evaluation of Wood --Static Bending, Transverse Vibration, and Longitudinal Stress Wave Nondestructive Evaluation Methods --Ultrasonic-Based Nondestructive Evaluation Methods for Wood --Proof Loading --Sounding, Probing, Moisture Content, and Resistance Drilling Techniques --A Review of the Piezoelectric Effect.

Sensors, an international, peer-reviewed Open Access journal. Dear Colleagues, Non-destructive testing/evaluation (NDT/NDE) methods clearly have a significant role in both science and technology. Non-destructive testing (NDT) methods are an important means to detect and assess rock damage.

To better understand the accuracy of NDT methods for measuring damage in sandstone, this study compared three NDT methods, including ultrasonic testing, electrical impedance spectroscopy (EIS) testing, computed tomography (CT) scan testing, and a destructive test method, elastic modulus testing.

Several nondestructive testing methods have been shown to be feasible for the detection of knots, such as microwave detection technology and ultrasonic methods, which utilize the principle of the difference in dielectrical properties and acoustic properties between knots and normal wood.

In this work, a wood material was nondestructively characterized and a technique was developed to measure ultrasonic velocity in wood using automated data acquisition software. It is desirable to perform nondestructive evaluation (NDE) to assess material properties and absorption of wood because wood .In this paper, artificial creep degradation test and ultrasonic measurement for their creep degraded specimens (Cr-Mo alloy steel) were carried out for the purpose of evaluation for creep damage.

Absolute measuring method of quantitative ultrasonic measurement for material degradation was established, and long-term creep degradation tests using creep life prediction .The NDT methods included the longitudinal vibration method, in-plane and out-plane flexural vibration method.

The linear regression between dynamically elastic module and bending strength (MOR) and the effects of relative humidity on the reliability of NDT methods .