Experimental Techniques最新文献_第3页

On the Cover: Identification of Lightning Strike Damage Severity Using Pulse Thermography Through Integration of Thermal Data 封面：综合热数据，利用脉冲热成像技术识别雷击损伤严重程度

IF 1.5 4区工程技术

Experimental Techniques Pub Date : 2025-01-21 DOI: 10.1007/s40799-025-00776-7

引用次数: 0

PRANK: A Singular Value Based Noise Filtering of Multiple Response Datasets for Experimental Dynamics 恶作剧：基于奇异值的实验动力学多响应数据集噪声滤波

IF 1.9 4区工程技术

Experimental Techniques Pub Date : 2025-01-10 DOI: 10.1007/s40799-024-00774-1

F. Trainotti, S. W. B. Klaassen, T. Bregar, D. J. Rixen

{"title":"PRANK: A Singular Value Based Noise Filtering of Multiple Response Datasets for Experimental Dynamics","authors":"F. Trainotti, S. W. B. Klaassen, T. Bregar, D. J. Rixen","doi":"10.1007/s40799-024-00774-1","DOIUrl":"10.1007/s40799-024-00774-1","url":null,"abstract":"<div>High quality measurements are paramount to a successful application of experimental techniques in structural dynamics. The presence of noise and disturbances can significantly distort the information stored in the data and, if not adequately treated, may result in erroneous findings and misleading predictions. A common technique to filter out noise relies on decomposing the dataset into singular components sorted by their degree of significance. Discarding low-value contributions helps to clean the data and remove spuriousness. This paper presents PRANK, a novel singular value-based reconstruction approach for multiple-response vibration datasets. PRANK integrates the effect of Principal Response Functions and Hankel filtering actions, resulting in an improved data reconstruction for both system poles and zeros. The proposed formulation is tested on both analytical and numerical examples, showcasing its robustness, efficiency and versatility. PRANK operates with both time- and frequency-based data. Applied to noisy full-field camera measurements, the filter delivered excellent performance, indicating its potential for various identification tasks and applications in vibration analysis.</div>","PeriodicalId":553,"journal":{"name":"Experimental Techniques","volume":"49 4","pages":"677 - 701"},"PeriodicalIF":1.9,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s40799-024-00774-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145164443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

miniBLAST: A Novel Experimental Setup for Laboratory Testing of Structures Under Blast Loads miniBLAST：一种用于爆炸荷载下结构实验室测试的新型实验装置

IF 1.9 4区工程技术

Experimental Techniques Pub Date : 2025-01-09 DOI: 10.1007/s40799-024-00771-4

A. Morsel, F. Masi, E. Marché, G. Racineux, P. Kotronis, I. Stefanou

{"title":"miniBLAST: A Novel Experimental Setup for Laboratory Testing of Structures Under Blast Loads","authors":"A. Morsel, F. Masi, E. Marché, G. Racineux, P. Kotronis, I. Stefanou","doi":"10.1007/s40799-024-00771-4","DOIUrl":"10.1007/s40799-024-00771-4","url":null,"abstract":"<div>We present a novel experimental setup called miniBLAST, which enables systematic and repeatable laboratory tests of structures subjected to blast loads. The explosive source is based on the discharge of high electrical loads on a thin conductor, producing repeatable blast-type shock waves of controlled intensity. Conducting blast experiments under safe laboratory conditions offers significant advantages over large-scale experiments, which are expensive, require specialized personnel, and face repeatability issues. In this work, we provide a comprehensive description of the setup’s design rationale and technical characteristics. We place particular emphasis on the installation phases, safety, and metrology. The explosive source is analyzed and the signature of blast waves is retrieved. Finally, we present an example of a masonry wall subjected to blast loads of varying intensity. We then report its dynamic response in three dimensions and at different time instances. This new experimental setup offers a cost-effective, safe, and repeatable method to study structural dynamics under blast loads, with results that can be upscaled to real structures. It also aids in evaluating numerical models and lays the groundwork for further investigations into blast effects and mitigation.</div>","PeriodicalId":553,"journal":{"name":"Experimental Techniques","volume":"49 4","pages":"655 - 675"},"PeriodicalIF":1.9,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145163184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enabling Experimental Impulse-Based Substructuring Through Time Domain Deconvolution and Downsampling 通过时域反褶积和下采样实现实验脉冲子结构

IF 1.9 4区工程技术

Experimental Techniques Pub Date : 2024-12-13 DOI: 10.1007/s40799-024-00756-3

O.M. Zobel, F. Trainotti, D.J. Rixen

{"title":"Enabling Experimental Impulse-Based Substructuring Through Time Domain Deconvolution and Downsampling","authors":"O.M. Zobel, F. Trainotti, D.J. Rixen","doi":"10.1007/s40799-024-00756-3","DOIUrl":"10.1007/s40799-024-00756-3","url":null,"abstract":"<div>Dynamic substructuring, especially the frequency-based variant (FBS) using frequency response functions (FRF), is gaining in popularity and importance, with countless successful applications, both numerically and experimentally. One drawback, however, is found when the responses to shocks are determined. Numerically, this might be especially expensive when a huge number of high-frequency modes have to be accounted for to correctly predict response amplitudes to shocks. In all cases, the initial response predicted using frequency-based substructuring might be erroneous, due to the forced periodization of the Fourier transform. This drawback can be eliminated by completely avoiding the frequency domain and remaining in the time domain, using the impulse-based substructuring method (IBS), which utilizes impulse response functions (IRF). While this method has already been utilized successfully for numerical test cases, none of the attempted experimental applications were successful. In this paper, an experimental application of IBS to rods considered as one-dimensional is tested in the context of shock analysis, with the goal of correctly predicting the maximum driving point response peak. The challenges related to experimental IBS applications are discussed and an improvement attempt is made by limiting the frequency content considered through low-pass filtering and downsampling. The combination of a purely time domain based estimation procedure for the IRFs and the application of low-pass filtering with downsampling to the measured responses enabled a correct prediction of the initial shock responses of the rods with IBS experimentally, using displacements, velocities and accelerations.</div>","PeriodicalId":553,"journal":{"name":"Experimental Techniques","volume":"49 4","pages":"763 - 797"},"PeriodicalIF":1.9,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s40799-024-00756-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145164562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fatigue Damage Evaluation of Discontinuous Carbon Fiber-Reinforced Polymer Composites Using Thermoelastic Temperature Variations 基于热弹性温度变化的非连续碳纤维增强聚合物复合材料疲劳损伤评价

IF 1.9 4区工程技术

Experimental Techniques Pub Date : 2024-12-05 DOI: 10.1007/s40799-024-00766-1

A. Akai, Y. Sato, Y. Hamada, A. Mikuni

{"title":"Fatigue Damage Evaluation of Discontinuous Carbon Fiber-Reinforced Polymer Composites Using Thermoelastic Temperature Variations","authors":"A. Akai, Y. Sato, Y. Hamada, A. Mikuni","doi":"10.1007/s40799-024-00766-1","DOIUrl":"10.1007/s40799-024-00766-1","url":null,"abstract":"<div>Carbon fiber-reinforced polymer (CFRP) composites are expected to be increasingly adopted in automotive structures to achieve car weight reductions that yield an effective reduction of carbon dioxide emissions. Fatigue damage evaluation of CFRP composites is indispensable to guarantee their long-term use. In a thermography-based approach, a suitable temperature component to evaluate the fatigue damage of discontinuous CFRP composites—CFRP composites of discontinuous fibers—should be elucidated. In this study, the non-dimensional thermoelastic temperature amplitude, obtained through thermoelastic temperature variation measurements, is employed. This amplitude can be used to evaluate the stress state of a material subjected to cyclic loading. Moreover, the relationship between the non-dimensional thermoelastic temperature amplitude and fatigue damage is investigated under tension–tension cyclic loading for carbon fiber sheet molding compound (C-SMC), which is a discontinuous CFRP composite produced via sheet molding compound methods. Experimental results reveal that a decrease in the non-dimensional thermoelastic temperature amplitude is associated with the fatigue damage. This decrease is attributed to two factors. One is a change in the stress state applied in the longitudinal and transverse directions of the fiber caused by a shift in the dominant fiber orientation as fatigue damage progresses. The other is the difference in the thermal expansion coefficients in the longitudinal and transverse directions of the fiber. Therefore, the possibility of monitoring the fatigue damage evolution using the non-dimensional thermoelastic temperature amplitude is confirmed. Future studies should assess the remaining fatigue life of CFRP composites using thermoelastic temperature variations.</div>","PeriodicalId":553,"journal":{"name":"Experimental Techniques","volume":"49 4","pages":"609 - 621"},"PeriodicalIF":1.9,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of Economical Shake Table with Brushed DC Motor and Proportional-Derivative Control 有刷直流电动机及比例导数控制的经济型振动台的研制

IF 1.9 4区工程技术

Experimental Techniques Pub Date : 2024-12-05 DOI: 10.1007/s40799-024-00768-z

B. Parajuli, B. Bhatt, C. K. Kawan

{"title":"Development of Economical Shake Table with Brushed DC Motor and Proportional-Derivative Control","authors":"B. Parajuli, B. Bhatt, C. K. Kawan","doi":"10.1007/s40799-024-00768-z","DOIUrl":"10.1007/s40799-024-00768-z","url":null,"abstract":"<div>Earthquakes pose a significant threat to cities worldwide, necessitating the development of effective and affordable methods to evaluate structural performance under dynamic loading. Although large-scale shake table testing of full structures offers the most accurate approach, the high costs involved make it impractical for many, especially research institutions in developing countries. This study addresses this limitation by developing an affordable, single-degree-of-freedom shake table. The developed shake table is displacement-controlled with a payload capacity of 200 kg, offering a practical solution for testing scaled-down models of real structures. It is powered by a brushed DC motor, which is widely available in developing regions, and utilizes a modified proportional-derivative (PD) control algorithm to simulate both harmonic and real earthquake motions. Using this design, displacements up to ±150 mm and accelerations up to 1g were achieved with acceptable error margins. This paper provides a comprehensive explanation of the shake table’s mechanical design, control algorithm, hardware components, and user interface. It also presents comparisons between theoretical and experimental displacements and accelerations for sine wave and earthquake simulations under various payloads. The results highlight the effectiveness of this low-cost shake table as a viable tool for seismic testing, expanding access to critical structural evaluation in resource-limited settings.</div>","PeriodicalId":553,"journal":{"name":"Experimental Techniques","volume":"49 4","pages":"635 - 654"},"PeriodicalIF":1.9,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161852","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An Experimental Approach to Measure Slips at Frictional Contact Interfaces Using a Self-Powered Sensor 使用自供电传感器测量摩擦接触界面滑移的实验方法

IF 1.9 4区工程技术

Experimental Techniques Pub Date : 2024-12-05 DOI: 10.1007/s40799-024-00770-5

M. Ba, W. Qin, Y. Sun, W. Zhao

{"title":"An Experimental Approach to Measure Slips at Frictional Contact Interfaces Using a Self-Powered Sensor","authors":"M. Ba, W. Qin, Y. Sun, W. Zhao","doi":"10.1007/s40799-024-00770-5","DOIUrl":"10.1007/s40799-024-00770-5","url":null,"abstract":"<div>When fastening components connected through friction contacts are subjected to tangential cyclic loads, slips may occur at the contact interfaces. Under multiple cyclic tangential load excitations, slips may be cumulative or shakedown. However, few reports have conducted experimental work on slip behaviors because local micro slips are difficult to measure. In this paper, an experimental approach to measure slips at frictional contact interfaces under cyclic loads was presented, which could directly capture slip behaviors. In this approach, local micro slips at the contact interfaces were measured by a self-powered sensor based on the principles of a triboelectric nanogenerator (TENG), and a conventional digital source meter was used to collect the voltage signals from the sensor. This approach is completely different from existing contact displacement measurement methods. The slip behaviors in a flat-on-flat contact using an established test bench were observed experimentally. The finite element model of this contact configuration was built to simulate the dynamic slips and the results were in good agreement with the experimental results.</div>","PeriodicalId":553,"journal":{"name":"Experimental Techniques","volume":"49 4","pages":"623 - 633"},"PeriodicalIF":1.9,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s40799-024-00770-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Parametric Fabrication Technique of High-Temperature Speckle Based on Femtosecond Laser 基于飞秒激光的高温散斑参数化制备技术

IF 1.9 4区工程技术

Experimental Techniques Pub Date : 2024-12-04 DOI: 10.1007/s40799-024-00769-y

C. Shi, S. Lan, J. Li, C. Chen, Q. Fang, Y. Ren, B. Liu, W. He, H. Xie

{"title":"Parametric Fabrication Technique of High-Temperature Speckle Based on Femtosecond Laser","authors":"C. Shi, S. Lan, J. Li, C. Chen, Q. Fang, Y. Ren, B. Liu, W. He, H. Xie","doi":"10.1007/s40799-024-00769-y","DOIUrl":"10.1007/s40799-024-00769-y","url":null,"abstract":"<div>The service environment of many core components, such as aero-engine blades, tends toward extreme. Characterization of fatigue failure behavior at high-temperatures is an important means of evaluating their structural integrity, in which digital image correlation (DIC) method shows great potential and advantages due to its full-field, noncontact, and high-temperature compatibility. For high-temperature DIC, its accuracy highly depends on the quality of high-temperature speckle, i.e., deformation carrier or sensor, fabricated on specimen surface. Herein, a parametric high-temperature speckle fabrication technique combining high-temperature dual-layer coating and femtosecond laser etching is developed. The heat-resistant black matte paint and white boron nitride paint are successively coated on the specimen surface, then femtosecond laser is used to etch the coated layer, realizing the parametric non-destructive fabrication. Based on high-throughput design and high-temperature static test, the speckle parameters and fabrication processes are optimized. The fabrication quality of optimized speckles is further verified by charactering fatigue crack propagation behavior of nickel-based superalloy GH4169 at 650℃. The speckle maintains good quality without ablative erosion, showing the advantages of parameterization, automation, high quality, and strong universality/repeatability.</div>","PeriodicalId":553,"journal":{"name":"Experimental Techniques","volume":"49 4","pages":"597 - 607"},"PeriodicalIF":1.9,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Note of Gratitude from the Editor-in-Chief 总编辑的感谢信

IF 1.5 4区工程技术

Experimental Techniques Pub Date : 2024-11-25 DOI: 10.1007/s40799-024-00764-3

B. Antoun

引用次数: 0

Machinability and Surface Morphology of TiB2 Reinforced Al 7075 MMC During EDM with Cryogenic Treated Cu Electrode 低温处理Cu电极对TiB2增强Al 7075 MMC的电火花加工性能和表面形貌的影响

IF 1.5 4区工程技术

Experimental Techniques Pub Date : 2024-11-25 DOI: 10.1007/s40799-024-00767-0

R. C. Pradhan, D. Das, B. P. Sahoo, C. Samal

{"title":"Machinability and Surface Morphology of TiB2 Reinforced Al 7075 MMC During EDM with Cryogenic Treated Cu Electrode","authors":"R. C. Pradhan, D. Das, B. P. Sahoo, C. Samal","doi":"10.1007/s40799-024-00767-0","DOIUrl":"10.1007/s40799-024-00767-0","url":null,"abstract":"<div>This work accentuates investigation of machinability of TiB2/Al 7075 metal matrix composite (MMC) while electrical discharge machining (EDM) with cryogenic treated Cu electrode, following Taguchi L64 design of experiments (DOE). Influences of peak current (IP), pulse on time (TON) and gap voltage (VG) on material removal rate (MRR), tool wear rate (TWR) and average surface roughness (Ra) were studied. Morphology of the machined surfaces was also explored through scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and elemental mapping. Results revealed increment of MRR (by about 55%) and TWR (by about 75%) on increasing IP (from 4 A to 10 A at TON = 100µs at VG = 55 V), but these responses reduced (by about 70% and 9%, respectively) on increasing VG (from 55 V to 80 V at IP = 4 A and TON = 100µs). Ra was influenced significantly by the IP and TON levels. At 4 A of IP, 200µs of TON and 55 V of VG, SEM micrograph of the machined surface revealed craters, re-solidified regions, voids and cracks. On increasing the current level to 6 A keeping the other parameters constant, significant reduction of debris with larger craters were observed. On further increasing the current level to 10 A, minimal amount of debris, thicker ridges and deeper craters were witnessed from the machined surface microstructure. </div>","PeriodicalId":553,"journal":{"name":"Experimental Techniques","volume":"49 3","pages":"509 - 534"},"PeriodicalIF":1.5,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144073672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0