Lukasz Pieczonka

Lukasz Pieczonka
AGH University of Science and Technology in Kraków | AGH · Department of Robotics and Mechatronics

PhD DSc

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98
Publications
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902
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Publications

Publications (98)
Article
Multilayer plates are widely used as structural components, especially in high-tech industries. However, compared to much simpler homogeneous plates, they pose unique challenges to nondestructive testing (NDT) techniques. The inspections of multilayer plates using traditional ultrasonic (US) testing modalities can be challenging and time-consuming....
Article
No PDF available ABSTRACT Nondestructive testing (NDT) of adhesively bonded plate-like structures using traditional ultrasonic (US) testing modalities can be challenging and time-consuming. Faster inspection can be achieved with the use of full-field techniques based on guided waves. In particular, the local wavenumber estimation (LWE) of Lamb wave...
Article
Inspection of the elastic properties of plate-like structures is an important and challenging problem in many engineering disciplines. There exist multiple non-destructive inspection techniques based on active ultrasonic transducers to tackle this problem. In recent years, the usefulness of passively induced waves has also been explored. It has bee...
Article
This paper presents a study on nonlinear elastic wave modulation due to an applied periodic thermal field. The experimental study is performed with a thermal analogy of the vibro-acoustic wave modulation (VAM) technique. The aim is to identify sources of nonlinear effects appearing in the response signal of a damaged structure. Assigning specific n...
Article
The work is devoted to the numerical aspects of the modeling tool elaborated to simulate the phenomenon of solid phase transformation in shape memory alloys. Particularly, a nonlocal approach, namely the bond based variant of peridynamics, is of concern to handle material model nonlinearities conveniently. The proposed model considers thermomechani...
Article
Numerous nondestructive testing (NDT) methods have been developed to perform inspections of engineered structures. Frequently, increased precision of a given method is associated with longer inspection time. The trade-off between precision and inspection time is especially apparent in ultrasonic testing (UT). The imaging resolution is directly rela...
Article
This paper proposes a methodology to adjust an excitation force amplitude generated by laser-induced plasma shock wave. To realize a remote sensing technique, we investigate a non-contact method to vibrate target mechanical structures or infrastructures to be inspected using laser ablation or laser-induced plasma shock wave. Laser ablation damages...
Article
This paper presents a technique for vibration‐based damage detection and localization in engineering structures based on the high‐speed three‐dimensional Digital Image Correlation (HS 3D‐DIC) and local modal filtration. The efficacy of the proposed procedure is demonstrated on a frame structure with different severities of localized damage. The ful...
Article
Inspection of adhesively bonded metallic plates, commonly used in aircraft structures, remains challenging for modern non-destructive testing (NDT) techniques. When a probing ultrasound (US) wave interacts with the plate boundaries, it produces multiple propagating guided waves (or Lamb modes). Analysis of these waves can be complicated due to a st...
Article
Full-text available
Composite materials have been widely used in many advanced engineering structures, because of their high strength and good resistance to fatigue and corrosion. Nevertheless, their susceptibility to impact damage is one of the biggest concerns for use in critical load-bearing structures. Over the last few decades, many non-destructive techniques bas...
Chapter
This chapter provides examples of recent application developments in the field of nonlinear acoustics and damage detection, highlighting future trends and challenges. The major focus is on nondestructive testing of engineering components. Examples of damage detection methods based on the vibro-acoustic wave modulation technique are presented.
Conference Paper
The paper presents experimental investigation of sidebands in vibro-acoustic modulation test, generated as an effect of contact-type nonlinearity. The two samples with prepared contact surfaces were tested in experimental works. Two excitation types: low and high frequencies are introduced into the structure via electromagnetic shaker and piezoelec...
Conference Paper
Ultrasonic arrays are widely used in various fields including non-destructive testing and structural health monitoring (SHM) areas. Their application for inspection of anisotropic plates using guided waves is challenging, due to insufficient knowledge of angle-dependent wave velocity in the medium. Since time-reversal permits waves self-focusing wi...
Conference Paper
Full-text available
This paper presents an application of nonlinear vibro-acoustic wave modulations and cointegration-based signal processing for impact damage detection in light composite sandwich panels. Analysis of stationary statistical characteristics of vibro-acoustic responses after cointegration process are used for damage detection. The method is validated us...
Conference Paper
The paper presents an application of laser spot thermography for damage detection in ceramic materials. The measurement technique is based on an external heat delivery to a test sample by means of a laser pulse and signal acquisition by an infrared camera. Damage detection is based on the analysis of surface temperature distribution near the exciti...
Conference Paper
The paper discusses experimental verification of a damage detection method based on nonlinear crack-wave interactions in aluminum beam with fatigue crack. The method under consideration is based on a low-frequency vibration excitation, used to perturb damage, combined with high-frequency interrogating waves, used to detect damage-related nonlineari...
Article
Full-text available
The paper presents an application of laser spot thermography for damage detection in ceramic samples with surface breaking cracks. The measurement technique is an active thermographic approach based on an external heat delivery to a test sample, by means of a laser pulse, and signal acquisition by an infrared camera. Damage detection is based on th...
Article
The paper deals with the application of nonlinear vibro-acoustic modulation technique for detection and localization of impact damage in a laminated composite plate. An imaging procedure—based on the nonlinear vibro-acoustic modulation sidebands—is proposed. The procedure relies on simultaneous low-frequency modal and high-frequency ultrasonic exci...
Article
Full-text available
The problem of identification of non-linear phenomena associated with contact–type non-linearity is the subject of many research papers. The number of theoretical models describing the non-linear phenomena is constantly increasing. New capabilities of experimental verification and observation of these non-linear effects provide opportunities for a...
Article
It has been shown experimentally that it is feasible to use time-reversal elastic nonlinearity diagnostics (TREND) to estimate the penetration depth of stress corrosioncracks (SCC) in steel samples. TREND is a method to focus elastic waves energy to a point in space in order to probe that point for damage. High frequencies are used to probe near th...
Article
In this article, the non-linear vibro-acoustic modulation technique is used for structural damage detection. A new experimental configuration and data processing strategy are proposed to improve the damage detection capability of the technique. The swept sine chirp excitation is used for both low-frequency vibration/modal and high-frequency ultraso...
Article
Full-text available
ABSTRACT The scaling subtraction method (SSM) is a non-destructive measurement approach used to extract nonlinear features from the elastic response of a structure. As such it can be used for damage detection purposes by identifying nonlinearities that may result from the presence of micro cracks or inclusions in granular and metallic materials. Th...
Article
The paper presents a reliable methodology—based on nonlinear acoustics—for impact damage detection in composite materials. The nonlinear vibro-acoustic wave modulation technique is used to detect damage. The problem of operational variability of the method with respect to the selection of frequency and amplitude of low-frequency (LF) modal excitati...
Article
This paper introduces damage identification approach based on guided ultrasonic waves and 3D laser Doppler vibrometry. The method is based on the fact that the symmetric and antisymmetric Lamb wave modes differ in amplitude of the in-plane and out-of-plane vibrations. Moreover, the modes differ also in group velocities and normally they are well se...
Article
Full-text available
Evidence of the ability to probe depth information of stress corrosion cracking (SCC) are presented using the time reversed elastic nonlinearity diagnostic (TREND). Depth estimation of SCC is important to determine when a stainless steel canister has been breached. TREND is a method to focus elastic energy to a point in space in order to probe that...
Article
Over the last decades, nonlinear acoustic techniques have been developed to detect mechanical damage in solids. They have been proven to be far more sensitive to early damage than standard linear acoustic techniques. Unfortunately, they often require high amplitude waves to propagate within the sample. To be practical in industrial applications, si...
Article
Classical nonlinear vibration methods used for structural damage detection are often based on higher-and sub-harmonic generation. However, nonlinearities arising from sources other than damage – e.g. boundary conditions or a measurement chain – are a primary concern in these methods. This paper focuses on localisation of damage-related nonlineariti...
Article
The paper demonstrates how non-classical approaches can be used for structural health monitoring. Waveletbased modal analysis, various non-classical nonlinear acoustic techniques and cointegration are used for damage detection. These approaches are illustrated using various examples of damage detection in metallic and composites structures.
Conference Paper
The paper discusses the use of wideband excitation in nonlinear vibro-acoustic modulation technique (VAM) used for damage detection. In its original form, two mono-harmonic signals (low and high frequency) are used for excitation. The low frequency excitation is typically selected based on a modal analysis test and high frequency excitation is sele...
Article
The paper presents a new damage-detection method based on nonlinear crack-wave interaction. Low-frequency vibration excitation is introduced to perturb damage, and high-frequency interrogating wave is used to detect damage-related nonlinearities. However, in contrast to other crack-wave interaction approaches, localised wave packets are used for hi...
Article
This paper deals with the problem of elastic constant identification in thin plates made of orthotropic composite materials. The approach is based on the analysis of Lamb wave propagation and the related dispersion curves to find the underlying material elastic constants. In the proposed implementation a scanning laser Doppler vibrometer is used to...
Article
Full-text available
We demonstrate the possibility of selectively imaging the features of a barely visible impact damage in a laminated composite plate by using an air-coupled time reversal mirror. The mirror consists of a number of piezoelectric transducers affixed to wedges of power law profiles, which act as unconventional matching layers. The transducers are enclo...
Conference Paper
Full-text available
The paper investigates an application of active thermography for nondestructive testing and evaluation of aluminum structures. Two active thermography techniques are considered: vibrothermography and laser spot thermography. Experiments were performed on aluminum samples with fatigue cracks in order to compare the effectiveness of both measurement...
Article
We present an overview of research developments related to the nonlinear vibroacoustic modulation technique used for structural damage detection. The method of interest is based on nonlinear interactions of a low-frequency pumping wave and a high-frequency probing wave. These two waves are introduced to monitored structures simultaneously. Then the...
Article
We present the first set of experiments in which air-coupled ultrasonic emission is used for exhaustive and rapid imaging of a Barely Visible Impact Damage (BVID) introduced by an impact test on a laminated composite. Such experiments have been limited thus far by the impedance mismatch of nearly five orders of magnitude between the air and an elas...
Article
In some Non-Destructive Evaluation techniques, detecting a crack is only the first step. Some applications like monitoring of used nuclear fuel canister also requires the characterization of the orientation of the cracks if any exist. Here, we show experimental results that expand the Time Reversal Elasticity Nonlinear Diagnostic method (TREND) to...
Article
Full-text available
This paper concerns the experimental analysis of nonlinear response features of a composite laminate plate for impact damage detection. The measurement procedure is based on the Scaling Subtraction Method (SSM) and consists in exciting the damaged specimen with two sinusoidal signals at different amplitude. The linearly rescaled response signal at...
Article
Full-text available
This paper presents experimental results demonstrating the increase in ultrasonic radiation obtained from a wedge of cubic profile relative to a plate of uniform thickness. The wedge of cubic profile provides high efficiency sound radiation matching layer from a mounted piezoelectric transducer into the surrounding air. Previous research on structu...
Article
Modern structures are often designed using new types of lightweight materials of interesting properties. Accurate information on physical properties of these materials is a key element of every stage of lifecycle from design through maintenance to retirement. Although there are numerous experimental methods that can be used for material testing, on...
Article
Nonlinear effects in vibration responses are investigated for the undamaged composite plate and the composite plate with a delamination. The analysis is focused on higher harmonic generation in vibration responses for various excitation amplitude levels. This effect is investigated using the triple correlation technique. The dynamics of composite p...
Conference Paper
Full-text available
The paper presents statistical analysis of damage index used to detect structural damage in the recently developed enhanced nonlinear crack-wave interaction technique. Con- sidered damage detection technique combines Lamb waves propagation with nonlinear acous- tics. Low-frequency excitation is used to modulate propagating Lamb waves in the presenc...
Article
Full-text available
The paper presents a novel damage detection method that combines Lamb wave propagation with nonlinear acoustics. Low-frequency excitation is used to modulate Lamb waves in the presence of fatigue cracks. The work presented shows that the synchronization of the interrogating high-frequency Lamb wave with the low-frequency vibration is a key element...
Article
The paper deals with the problem of Lamb waves dispersion curves sensitivity to the change of elastic constants in composite materials. The framework of the present work is a more general problem of material constants identification in thin plates made of composite materials. The approach is based on the analysis of guided waves propagation and the...
Article
The paper deals with the nonlinear vibro-acoustic modulation technique (VAM) used for nondestructive damage detection in composites. In its original form the technique allows only for the determination of the presence of damage in a structure. This paper presents an enhancement of the technique that allows also for the determination of damage locat...
Article
Recent years have shown a growing interest in damage detection methods based on damage-related nonlinearities in structures. In the paper, the numerical simulations of two techniques - classical Higher Harmonic generation and Vibro-Acoustic Modulation - are presented and validated experimentally. Two-dimensional models of beam with non-propagating...
Article
Full-text available
The paper presents a comparative study on impact damage detection in light composite sandwich panels. Three different nondestructive testing methods were used to characterize damage in a test specimen that resulted from a controlled low velocity impact event. The analyzed test methods include the ultrasonic c-scan, vibrothermography and shearograph...
Conference Paper
Full-text available
The paper presents a comparative study of damage detection in composite patch repairs. Three different nondestructive testing methods were used to characterize artificial damage in carbon fiber reinforced polymer (CFRP) samples with external patch repairs. The damage was introduced in the form of Teflon inserts of different sizes and locations. The...
Article
The nonlinear vibro-acoustic modulation technique is used for impact damage detection in light composite sandwich panels. The method utilizes piezo-based low-frequency vibration and high-frequency ultrasonic excitations. The work presented focuses on the analysis of modulation intensity. The results show that the method can be used for impact damag...
Article
Full-text available
The paper describes the application of nonlinear acoustic techniques recently reported in scientific literature for imaging of structural damage in a laminated composite plate. The techniques that have been considered include the local defect resonance technique and the second harmonic imaging technique. The tests are performed on a carbon fiber/ep...
Conference Paper
This paper investigates the nonlinear cross-modulation vibro-acoustic technique for fatigue crack detection in metallic structures. The method is used in an aluminium plate instrumented with low-profile piezoceramic transducers that are used for excitation. Laser vibrometry is used to acquire vibro-acoustic responses. The results demonstrate the mo...
Conference Paper
Full-text available
The paper presents an application of the nonlinear vibro-acoustic modulation technique for the analysis of an aluminum beam with simulated cracks. The measurement technique is based on the analysis of the response resulting from structural excitation at two distinct frequencies. The frequencies are typically a low frequency modal excitation and an...
Article
The paper investigates the problem of improving driveability of alpine skis. That properties depend largely on the vibration behavior of a ski under different snow conditions. There is a broad range of methods to deal with vibration damping, both active and passive, that have been described in the literature. In this paper the passive approaches we...
Article
Full-text available
The paper investigates the application of active thermography for nondestructive testing of welded joints. Two measurements techniques are considered: laser spot thermography and vibrothermography. Experiments were performed on a welded carbon steel plate with welding defects. Laser spot thermography was used to reveal welding defects and vibrother...
Article
Impact damage detection is one of the most important problems in maintenance of composite structures. Various methods have been developed for the last few decades, including classical non-destructive and structural health monitoring approaches. Recent years have brought significant interest in methods based on nonlinear interactions between damage...
Article
The paper investigates the influence of excitation frequency on the effectiveness of vibrothermographic testing. Vibrothermography is a nondestructive testing method that monitors heat produced by damage under vibrational excitation in order to evaluate the structural health. Layered carbon fiber reinforced polymer plate with polytetrafluoroethylen...
Article
The paper investigates the problem of structural health monitoring of composite patch repairs used in aerospace applications. Two diagnostic techniques are applied to evaluate the structural health of two carbon fiber reinforced composite samples with bonded patch repairs; one test sample has a correctly manufactured patch repair without manufactur...
Article
The paper describes different image-based techniques that can be used for nondestructive inspection of composites. The focus is on four approaches: pulsed thermography, vibrothermography, laser Doppler vibrometry and shearography. All of the considered test techniques offer full field inspection capability and straightforward interpretation of test...
Article
Full-text available
This paper investigates the effect of low-frequency vibration and the related temperature field on nonlinear vibro-acoustic wave modulations. Experimental modal analysis was used to find natural frequencies and mode shapes of a composite laminate plate with seeded delamination. Temperature distribution was analyzed with a thermographic camera in th...
Article
The paper deals with practical aspects of Thermographic Nondestructive Testing (TNDT). A comparative study of burst vibrothermography (VT) and pulsed thermography (PT) measurements is presented and discussed. The authors have developed a diagnostic system for thermographic testing of structures that was used to perform experiments. Supported test m...
Article
The paper investigates experimentally the effect of low-frequency vibration on nonlinear vibro-acoustic wave modulations applied to the detection of Barely Visible Impact Damage (BVID) in a composite plate. Finite Element (FE) modeling was used in a pretest stage to identify different motion scenarios of delaminated surfaces and relate them to natu...
Chapter
This chapter discusses different ways of using thermographic measurements in nondestructive evaluation and Structural Health Monitoring. First, classification of the thermographic techniques focused on active thermography with internal excitation, including vibrothermography (VT), is presented. An overview of the measurement equipment including the...
Article
The paper investigates modelling aspects related to application of vibrothermography for detection of barely visible impact damage in composite structures. Low-velocity impact tests were performed to introduce multiple delaminations into carbon/epoxy composite plate. Damage severity was revealed using well-established non-destructive evaluation tec...
Conference Paper
Barely visible impact damage in a layered composite plate is investigated. Two experimental approaches, based on nonlinear acoustics, are applied for impact damage detection. The Local Defect Resonance method and the Second Harmonic Identification Technique are used to reveal the damage. A low-profile piezoceramic stack actuator is applied to excit...
Conference Paper
The paper proposes a method of estimating elastic constants of thin plates based on the guided waves propagation and the inverse problem solution. In the proposed approach a Scanning Laser Doppler Vibrometer measurements are employed to find the dispersion curves of Lamb waves propa gating in thin plates. The virtual counterpart of the experiment i...