scholarly journals Overview of the program to assess the reliability of emerging nondestructive techniques open testing and study of flaw type effect on NDE response

2016 ◽  
Author(s):  
Ryan M. Meyer ◽  
Ichiro Komura ◽  
Kyung-cho Kim ◽  
Tommy Zetterwall ◽  
Stephen E. Cumblidge ◽  
...  
Keyword(s):  
Nondestructive Techniques ◽  
Flaw Type

Utilization of nondestructive techniques for analysis of the Martian meteorite NWA 6963 and its implications for astrobiology

2017 ◽  
Vol 47 (1) ◽  
pp. 86-91 ◽  
Author(s):  
Bruno L. do Nascimento-Dias ◽  
Davi F. de Oliveira ◽  
Alessandra S. Machado ◽  
Olga M.O. Araújo ◽  
Ricardo T. Lopes ◽  
...  
Keyword(s):  
Martian Meteorite ◽  
Nondestructive Techniques

scholarly journals Current Trends in Integration of Nondestructive Testing Methods for Engineered Materials Testing

Sensors ◽  
2021 ◽  
Vol 21 (18) ◽  
pp. 6175
Author(s):  
Ramesh Kumpati ◽  
Wojciech Skarka ◽  
Sunith Kumar Ontipuli
Keyword(s):  
Nondestructive Testing ◽  
Data Acquisition ◽  
Mechanical Testing ◽  
Impact Testing ◽  
Materials Testing ◽  
Testing Methods ◽  
Molecular Arrangement ◽  
Nondestructive Techniques ◽  
Nondestructive Testing Methods ◽  
Engineered Materials

Material failure may occur in a variety of situations dependent on stress conditions, temperature, and internal or external load conditions. Many of the latest engineered materials combine several material types i.e., metals, carbon, glass, resins, adhesives, heterogeneous and nanomaterials (organic/inorganic) to produce multilayered, multifaceted structures that may fail in ductile, brittle, or both cases. Mechanical testing is a standard and basic component of any design and fabricating process. Mechanical testing also plays a vital role in maintaining cost-effectiveness in innovative advancement and predominance. Destructive tests include tensile testing, chemical analysis, hardness testing, fatigue testing, creep testing, shear testing, impact testing, stress rapture testing, fastener testing, residual stress measurement, and XRD. These tests can damage the molecular arrangement and even the microstructure of engineered materials. Nondestructive testing methods evaluate component/material/object quality without damaging the sample integrity. This review outlines advanced nondestructive techniques and explains predominantly used nondestructive techniques with respect to their applications, limitations, and advantages. The literature was further analyzed regarding experimental developments, data acquisition systems, and technologically upgraded accessory components. Additionally, the various combinations of methods applied for several types of material defects are reported. The ultimate goal of this review paper is to explain advanced nondestructive testing (NDT) techniques/tests, which are comprised of notable research work reporting evolved affordable systems with fast, precise, and repeatable systems with high accuracy for both experimental and data acquisition techniques. Furthermore, these advanced NDT approaches were assessed for their potential implementation at the industrial level for faster, more accurate, and secure operations.

Detection of decay damage in iron-wood living trees by nondestructive techniques

2015 ◽  
Vol 62 (1) ◽  
pp. 42-51 ◽  
Author(s):  
Cheng-Jung Lin ◽  
Yue-Hsing Huang ◽  
Gwo-Shyong Huang ◽  
Meng-Ling Wu
Keyword(s):  
Nondestructive Techniques

Nondestructive Quality Evaluation From a Horticulturist's Point of View

1978 ◽  
Vol 41 (1) ◽  
pp. 63-66 ◽  
Author(s):  
W. E. BALLINGER ◽  
W. F. McCLURE ◽  
E. P. MANESS ◽  
W. B. NESBITT ◽  
D. E. CARROLL ◽  
...  
Keyword(s):  
Quality Evaluation ◽  
Fruits And Vegetables ◽  
Quality Characteristics ◽  
Point Of View ◽  
High Quality ◽  
Nondestructive Techniques ◽  
Nondestructive Quality

Application of nondestructive sorting of fruits can be direct or indirect. Direct applications involve mainly objective means of establishing grades and quality of fruits and vegetables, as well as use of light-sorting and other nondestructive means for determining when a crop should be harvested or whether it should be marketed fresh or processed immediately. Indirect applications might be termed “research” usage of nondestructive sorting. Plant breeders would find nondestructive techniques useful for rapidly evaluating quality characteristics during the development of high quality cultivars. Physiologists could utilize it to rapidly determine the effects of treatments upon the quality of the commodity. Examples of development of techniques of light-sorting of blueberries and grapes for ripeness are discussed.

Research on Automatic Flaw Classification and Feature Extraction of Ultrasonic Testing

2008 ◽  
Vol 381-382 ◽  
pp. 631-634 ◽  
Author(s):  
Jian Li ◽  
X. Zhan ◽  
J. Zhuge ◽  
Z. Zeng ◽  
Shi Jiu Jin
Keyword(s):  
Neural Network ◽  
Bp Neural Network ◽  
Bp Network ◽  
Local Characteristics ◽  
Computational Speed ◽  
Ultrasonic Echo ◽  
Flaw Classification ◽  
Girth Welds ◽  
Flaw Type

In this paper, Lifted Wavelet Transform (LWT) and BP neural network are used for automatic flaw classification of pipeline girth welds. LWT is proposed to extract flaw feature from ultrasonic echo signals, ideally matched local characteristics of original signal and increasing the computational speed and flaw classification efficiency. After extracting features of all flaw echoes, a feature library is constructed. A modified BP neural network is followed as a classifier, trained by the library. When feature of any flaw echo is extracted and sent to BP network, flaw type is the output, realizing automatic flaw classification. Experiment results prove the proposed method, LWT with BP neural network, is more fit for automatic flaw classification than traditional methods.

NDE/SHM of Underwater Structures: A Review

2012 ◽  
Vol 83 ◽  
pp. 208-216 ◽  
Author(s):  
P. Rizzo
Keyword(s):  
Natural Gas ◽  
Retaining Walls ◽  
Offshore Structures ◽  
Structural Failure ◽  
The People ◽  
Nondestructive Techniques ◽  
Water Mains ◽  
Oil And Natural Gas ◽  
Underwater Structures

Subsea infrastructures and broadly speaking any structure containing or surrounded by water such as water mains represent an important element of modern civilization. An arbitrary classification could consist of five groups: offshore structures that serve to extract oil or natural gas from the sea bead; communication cables; pipelines that carry oil and natural gas; naval vessels (ships and submarines); waterfront facilities such as piers, retaining walls, and docks. The occurrence of structural failure of any of these systems can have serious consequences for the people, the environment, and the economy. In this paper we describe the most important nondestructive techniques adopted to assess the health of offshore structures, pipelines, and marine facilities.

Elastic-Plastic Analysis of Crack Opening, Stable Growth and Instability Behavior in Flawed 304 SS Piping

1983 ◽  
Vol 105 (4) ◽  
pp. 290-298 ◽  
Author(s):  
M. D. German ◽  
V. Kumar
Keyword(s):  
Applied Load ◽  
Failure Load ◽  
Crack Opening ◽  
Stress Criterion ◽  
Applied Loading ◽  
Area Of Interest ◽  
Bending Effect ◽  
Stable Growth ◽  
Flaw Type ◽  
Growing Cracks

Crack initiation, stable growth, instability and crack opening behavior in flawed 304 SS piping has been examined within the framework of the engineering approach developed by Kumar, German and Shih [1]. Crack geometries considered include part-through, complete circumferentially cracked pipe subjected to remote tension, and through-wall flawed pipe in tension and in bending. Effect of flaw type and size, pipe diameter and length, and applied loading on the failure load and mechanism is investigated. Results are employed to assess the net section stress criterion based on plastic collapse. Crack opening area of interest in leak rate evaluations is calculated as a function of applied load or pipe end deflection for stationary as well as growing cracks.

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