Analysis of the possibility of non-destructive testing to detect defects in multi-layered composites reinforced fibers by optical IR thermography

2019 ◽  
Vol 213 ◽  
pp. 204-208 ◽  
Author(s):  
Monika Pracht ◽  
Waldemar Swiderski
Keyword(s):  
Non Destructive Testing ◽  
Layered Composites ◽  
Ir Thermography ◽  
Destructive Testing ◽  
Non Destructive

Application of Gradient Based IR Thermography to the GRP Structures Inspection

2011 ◽  
Vol 488-489 ◽  
pp. 682-685 ◽  
Author(s):  
Lovre Krstulović-Opara ◽  
Endri Garafulić ◽  
Branko Klarin ◽  
Željko Domazet
Keyword(s):  
Pulse Heating ◽  
Non Destructive Testing ◽  
Ir Thermography ◽  
Destructive Testing ◽  
Heat Flows ◽  
Testing Method ◽  
Reinforced Polymer ◽  
Gradient Based ◽  
Non Destructive ◽  
Gradient Approach

The article presents application of non destructive testing method based on the pulse heating infrared thermography used to detect material anomalies for the case of glass reinforced polymer structures. The goal of presented research, based on the thermal gradient approach, is to establish the procedure capable of filtering out anomalies from other thermal influences caused by thermal reflections of surrounding objects, geometry influences and heat flows for observed object.

scholarly journals A Cost-Effective System for Aerial 3D Thermography of Buildings

2020 ◽  
Vol 6 (8) ◽  
pp. 76
Author(s):  
Claudia Daffara ◽  
Riccardo Muradore ◽  
Nicola Piccinelli ◽  
Nicola Gaburro ◽  
Tullio de Rubeis ◽  
...  
Keyword(s):  
3D Imaging ◽  
Three Dimensional ◽  
Cost Effective ◽  
Complex Structures ◽  
Non Destructive Testing ◽  
Ir Thermography ◽  
Destructive Testing ◽  
Effective System ◽  
Reconstruction Software ◽  
Non Destructive

Three-dimensional (3D) imaging and infrared (IR) thermography are powerful tools in many areas in engineering and sciences. Their joint use is of great interest in the buildings sector, allowing inspection and non-destructive testing of elements as well as an evaluation of the energy efficiency. When dealing with large and complex structures, as buildings (particularly historical) generally are, 3D thermography inspection is enhanced by Unmanned Aerial Vehicles (UAV—also known as drones). The aim of this paper is to propose a simple and cost-effective system for aerial 3D thermography of buildings. Special attention is thus payed to instrument and reconstruction software choice. After a very brief introduction to IR thermography for buildings and 3D thermography, the system is described. Some experimental results are given to validate the proposal.

NDT Analysis of Metal Materials with Internal Defects Using Active Infrared Thermography Method

2006 ◽  
Vol 321-323 ◽  
pp. 835-840 ◽  
Author(s):  
Won Tae Kim ◽  
Man Yong Choi ◽  
Jung Hak Park
Keyword(s):  
Infrared Thermography ◽  
Thermal Imaging ◽  
Non Destructive Testing ◽  
Ir Thermography ◽  
Internal Defects ◽  
Destructive Testing ◽  
Active Infrared Thermography ◽  
Thermal Patterns ◽  
Metal Materials ◽  
Non Destructive

This study is aimed to analyze the thermal imaging patterns presented by infrared(IR) thermography at which the metal with internal defects are thermally heated. Through the knowledge of non-destructive testing which infrared thermography can be applied to detect the defects inside the materials, there are two materials experimented; one is stainless steel and the other is cast-iron. Thermally, each material of specimens is heated at the base of the material and kept with constant temperature, The artificial defects in the specimen are formulated. Under the shape and location of the defects, temperature profiles are also measured and validated using the computer simulation. It is concluded that the characteristics of thermal patterns obtained from IR thermography are consistent with those of measurement and computations.

scholarly journals CFRP Non-Destructive Testing Using IR Thermography Methods

Proceedings ◽  
2019 ◽  
Vol 27 (1) ◽  
pp. 30
Author(s):  
Swiderski
Keyword(s):  
Construction Materials ◽  
Non Destructive Testing ◽  
Ir Thermography ◽  
Destructive Testing ◽  
Active Infrared Thermography ◽  
Multilayer Composites ◽  
Military Applications ◽  
Different Types ◽  
The Many ◽  
Non Destructive

Multilayer composites reinforced fibres are often used in military applications as construction materials for lightweight ballistic covers that protect against fragments and projectiles. The basic fibre used in these applications is aramid fibre, but research is also conducted using carbon fibres. One of the many methods used in non-destructive testing of composites is active infrared thermography, in which different types of sources can be used to thermally stimulate the material being tested. This paper compares the results obtained with various methods of thermal stimulation in the study of samples made with CFRP with deliberately introduced defects and destructive tests.

scholarly journals Non-Destructive Evaluation of Composite Helmets Using IR Thermography and Ultrasonic Excitation

2021 ◽  
Vol 25 (4) ◽  
pp. 89-92
Author(s):  
Waldemar Świderski ◽  
Monika Pracht
Keyword(s):  
Infrared Thermography ◽  
Non Destructive Testing ◽  
Ir Thermography ◽  
Destructive Testing ◽  
Non Destructive Evaluation ◽  
Non Destructive ◽  
Pulsed Infrared Thermography

The paper presents selected results of non-destructive testing of composite helmets with deliberately introduced defects. Ultrasound pulsed infrared thermography was used for the tests. In order to determine the initial possibilities of this method, artificial defects made of Teflon featuring different area sizes and designed to simulate delamination were placed between layers of the aramid composite from which the helmet was made. The obtained results confirmed the effectiveness of the NDT method used in these tests.

Active Thermografy as a Method for Non-destructive Testing of Polymer Composite Materials

2021 ◽  
Vol 16 (2) ◽  
pp. 5-9
Author(s):  
Eva Popardovská ◽  
◽  
Vladimír Popardovský ◽  
Keyword(s):  
Composite Materials ◽  
Real Time ◽  
Material Surface ◽  
Non Destructive Testing ◽  
Ir Thermography ◽  
Testing Methods ◽  
Destructive Testing ◽  
Thermal Fields ◽  
Active Thermography ◽  
Non Destructive

Infrared (IR) thermography is a method for imaging thermal fields on the target surfaces in real time. It is a noncontact and non-destructive method of obtaining thermogram of tested material surface or inside of it. We can divide the IR thermographic testing methods into two basic groups – passive and active thermography. This article introduces a basic overview of IR active thermography.

scholarly journals NMR Relaxometry and IR Thermography to Study Ancient Cotton Paper Bookbinding

2019 ◽  
Vol 9 (16) ◽  
pp. 3406 ◽  
Author(s):  
Mariagrazia Tortora ◽  
Stefano Sfarra ◽  
Cinzia Casieri
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Conservation Status ◽  
Non Destructive Testing ◽  
Ir Thermography ◽  
Combined Method ◽  
Destructive Testing ◽  
Nmr Relaxometry ◽  
Comprehensive Knowledge ◽  
Nuclear Magnetic Resonance Relaxometry ◽  
Non Destructive

Defects related to degradation were observed in an ancient book paperboard cover through nuclear magnetic resonance relaxometry and infrared thermography. Data collected with this combined method allowed identifying areas with moisture content and thermal diffusivity anomalies within the front board, corresponding to the different conservation status of the cellulose-based material. Non-destructive testing analytical procedures provide comprehensive knowledge for preserving precious library archives.

scholarly journals Experimental Testing of Aramid Composite Applied in Ballistic Armour by Ultrasonic IR Thermography

2019 ◽  
Vol 10 (2) ◽  
pp. 79-88
Author(s):  
Monika PRACHT ◽  
Waldemar ŚWIDERSKI
Keyword(s):  
Experimental Testing ◽  
Source Parameters ◽  
Non Destructive Testing ◽  
Ir Thermography ◽  
Destructive Testing ◽  
X Ray ◽  
Testing Procedures ◽  
Input Source ◽  
Non Destructive ◽  
Reference Samples

Reference samples, in which artificial discontinuities (defects) are fabricated, are used to verify non-destructive testing procedures. Artificial discontinuities are known defects of reference samples and enable verification the feasibility of the verified NDT method for the identification of location and depth of discontinuities. Thermographic inspection of reference samples also helps to determine the required thermal input source parameters to test samples. This paper presents the results of experimental testing for ultrasonic IR thermography of defects in aramid composite laminate intended for light ballistic armour. Specimens of the aramid composite material included artificial defects and were inspected at various ultrasonic frequencies. Optical thermography and X-ray inspection were carried out on the same specimens, and their results were compared to those determined with ultrasonic IR thermography.

DAMAGE IDENTIFICATION AND REPAIR OF COMPOSITE ARMOUR

2011 ◽  
Vol 159 (1) ◽  
pp. 261-270
Author(s):  
Marek SZUDROWICZ ◽  
Waldemar ŚWIDERSKI
Keyword(s):  
Damage Identification ◽  
Non Destructive Testing ◽  
Ir Thermography ◽  
Destructive Testing ◽  
Internal Damage ◽  
Testing Method ◽  
Present Composite ◽  
Non Destructive ◽  
External Damage

Composite armour is a preferred solution against military and paramilitary threats at present. Composite armour has to be resistant against impacts of fragments and bullets as well as mines and grenades. Except visible external damage of composite armour, its internal damage is equally essential. An IR thermography non-destructive testing method was used to identify delamination areas in composite armour. The results of these tests are presented in the paper. The authors also discuss the possibilities of composite armour repair methods.

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