Non-Destructive Defectoscopy of Building Structures by Lock-In Thermography

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1122.173 ◽

2015 ◽

Vol 1122 ◽

pp. 173-176

Author(s):

Zdeněk Peřina ◽

Radek Fabian ◽

Marie Wolfová ◽

Pavel Valíček ◽

Vladan Panovec

Keyword(s):

Heat Flow ◽

Environmental Change ◽

Diagnostic Methods ◽

Building Structures ◽

Sinusoidal Wave ◽

Lock In ◽

Non Destructive ◽

Destructive Methods

Nowadays there are many diagnostic methods for the detection of different defects in building structures. Destructive methods, which do not enable purposeful redevelopment action or a potential cause prediction of the defect without damage to the structure, are mostly used. Lock-in thermography is based on the modulation of the controlled heat flow, which impact on the diagnosed object. Heat (usually sinusoidal) wave penetrates inside the element and in the place of environmental change, ie. anomalies / deviations in the structure of the material of the tested object are reflected back to the surface. The paper focuses on the possibility of using lock-in thermography in the detection of various defects in building structures.

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Analysis Of Damage Arising From Exploitation Of The Aircraft

Journal of Konbin ◽

10.2478/jok-2014-0027 ◽

2014 ◽

Vol 32 (1) ◽

pp. 5-18

Author(s):

Piotr Woźny ◽

Józef Błachnio

Keyword(s):

Research Methods ◽

Technical Condition ◽

Diagnostic Methods ◽

Non Destructive ◽

Destructive Methods

Abstract During exploitation, due to a variety of reasons, aircrafts are damaged or suffer from different failures. In the process of operation, using appropriate methods of diagnosis, failure, damage, and relative deregulation of individual elements or units can be detected. For this purpose, one can apply a number of indirect diagnostic methods with the use of recorded diagnostic signals or a direct diagnosis with the use of non-destructive methods. The proper identification of the technical condition allows to determine the causes of irregularities and take actions aimed at preventing their occurrence. The article presents the types of exploitation damage of a multi-purpose aircraft. In addition, the criteria for the division of damage and research methods of the causes of damage are presented. Furthermore, an analysis of the scope of activities to be performed during the research of causes of damage to the aircraft is made.

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State-of-the-art non-destructive methods for diagnostic testing of building structures – anticipated development trends

Archives of Civil and Mechanical Engineering ◽

10.1016/s1644-9665(12)60133-2 ◽

2010 ◽

Vol 10 (3) ◽

pp. 5-18 ◽

Cited By ~ 111

Author(s):

J. HOŁA ◽

K. SCHABOWICZ

Keyword(s):

State Of The Art ◽

Diagnostic Testing ◽

Building Structures ◽

Development Trends ◽

Non Destructive ◽

Destructive Methods

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The Existing Timber Structures – Possibilities and Limits of Diagnostic Methods in Assessment Process

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.923.17 ◽

2014 ◽

Vol 923 ◽

pp. 17-24

Author(s):

Jana Daňková ◽

Tereza Murínová ◽

Pavel Mec

Keyword(s):

Diagnostic Methods ◽

Assessment Process ◽

Building Structures ◽

Monitoring Methods ◽

Wood Structures ◽

Qualitative And Quantitative ◽

Quantitative Characteristics ◽

Destructive Measurement ◽

Non Destructive ◽

Qualitative And Quantitative Characteristics

The wood is traditionally been applied as the building material in building and bridge construction. The number of applications of wood in building structures increases in recent years. According with this trend, the emphasis is on the development of diagnostic and monitoring methods for existing wood structures. In the paper, published results of a survey of existing wood structures in relation to the evaluation of qualitative and quantitative characteristics of the investigated structures. There are finally discussed the possibility to reproduce the results of non-destructive measurement relative to evaluate the strength characteristics of wood.

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Verification of Filling of Cable Ducts by Modern Diagnostic Methods

Advances in Science and Technology ◽

10.4028/www.scientific.net/ast.109.47 ◽

2021 ◽

Vol 109 ◽

pp. 47-52

Author(s):

Jaroslav Šnédar ◽

Vojtěch Bartoň ◽

Petr Cikrle

Keyword(s):

Diagnostic Methods ◽

Entire Length ◽

Bridge Engineering ◽

Bridge Girders ◽

Non Destructive ◽

Insufficient Knowledge ◽

Destructive Methods

A mayor problem in bridge engineering is the insufficient knowledge concerning the condition of prestressing reinforcement, especially in prefabricated bridge girders, which is largely related to the measure of grouting of cable duct. Therefore, this article deals with non-destructive methods that could verify the filling of cable duct with grout along their entire length, not just randomly in a few selected places. That is why it was decided to use modern non-destructive devices like GPR Live (8000), HILTI PS 1000 and Pundit 250 Array.

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Main Provisions Of The Concept Of Technology Of Diamond Cutting And Drilling Of Building Structures

Promyshlennoe i Grazhdanskoe Stroitel stvo ◽

10.33622/0869-7019.2019.06.59-63 ◽

2019 ◽

pp. 59-63

Keyword(s):

Combustion Engine ◽

Front Surface ◽

The Body ◽

Building Structures ◽

Diamond Cutting ◽

Variable Diameter ◽

Diamond Drilling ◽

Single Structure ◽

New Construction ◽

Non Destructive

The main provisions of the concept of technology of diamond cutting and drilling of building structures are considered. The innovativeness of the technology, its main possibilities and advantages are presented. Carrying out works with the help of this technology in underwater conditions expands its use when constructing and reconstructing hydraulic structure. The use of diamond drilling equipment with motors equipped with an internal combustion engine is considered. Drilling holes with a variable diameter during the reconstruction of the runways of airfields makes it possible to combine the landing mats into a single structure. The ability to cut inside the concrete mass, parallel to the front surface, has no analogues among the methods of concrete treatment. The use of this technology for producing blind openings in the body of concrete without weakening the structure is also unique. Work with precision quality in cutting and diamond drilling of concrete and reinforced concrete was noted by architects and began to be implemented in the manufacture of inter-room and inter-floor openings. Non-destructive approach to the fragmentation of building structures allows them to be reused. The technology of diamond cutting and drilling is located at the junction of new construction, repair, reconstruction of buildings and structures, and dismantling of structures. Attention is paid to the complexity and combinatorial application of diamond technology. Economic efficiency and ecological safety of diamond technology are presented. The main directions of further research for the development of technology are indicated.

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Failure Analysis Strategies for Multistacked Memory Devices with TSV Interconnects

ISTFA 2015: Conference Proceedings from the 41st International Symposium for Testing and Failure Analysis ◽

10.31399/asm.cp.istfa2015p0135 ◽

2015 ◽

Author(s):

Frank Altmann ◽

Christian Grosse ◽

Falk Naumann ◽

Jens Beyersdorfer ◽

Tony Veches

Keyword(s):

Failure Analysis ◽

Focused Ion Beam ◽

Failure Modes ◽

Ion Beam ◽

Memory Devices ◽

Metallographic Cross Section ◽

Electron Beam Induced Current ◽

Thermal Simulations ◽

Lock In ◽

Non Destructive

Abstract In this paper we will demonstrate new approaches for failure analysis of memory devices with multiple stacked dies and TSV interconnects. Therefore, TSV specific failure modes are studied on daisy chain test samples. Two analysis flows for defect localization implementing Electron Beam Induced Current (EBAC) imaging and Lock-in-Thermography (LIT) as well as adapted Focused Ion Beam (FIB) preparation and defect characterization by electron microscopy will be discussed. The most challenging failure mode is an electrical short at the TSV sidewall isolation with sub-micrometer dimensions. It is shown that the leakage path to a certain TSV within the stack can firstly be located by applying LIT to a metallographic cross section and secondly pinpointing by FIB/SEM cross-sectioning. In order to evaluate the potential of non-destructive determination of the lateral defect position, as well as the defect depth from only one LIT measurement, 2D thermal simulations of TSV stacks with artificial leakages are performed calculating the phase shift values per die level.

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