{"title":"Experimental Study and Numerical Analysis of Rock Dynamic Failure Based on Corner Correlation Method","authors":"X. Zhou, W. Li, Z. Ye, X. Wang, H. Miao","doi":"10.1007/s40799-025-00864-8","DOIUrl":"10.1007/s40799-025-00864-8","url":null,"abstract":"<div><p> Background: The experimental study of rock dynamic failure has always been the focus of scholars. However, the existing experimental techniques are difficult to monitor the deformation of the failure area during the rock failure process. Objective: The paper aims to propose a novel experimental and analytical approach for rock dynamic deformation measurement and failure mechanism, demonstrating its feasibility as a proof-of-concept study. Methods: The presented measurement method uses a Hopkinson pressure bar to perform dynamic experiments on fractured rock. A novel measurement system, incorporating a high-speed camera and a self-developed digital image–corner correlation method, addresses image distortion caused by differences in the object distance of corner points on the surface of cylindrical rock samples by applying surface normalization. Results: The results from this proof-of-concept study illustrate the dynamic evolution of cracks and the strain field on the observed surface during the fracture process of rock under impact loading. A crack evolution factor and strain concentration factor based on strain statistics are introduced. Finite element simulations model the entire fracture process in sandstone under SHPB dynamic compression, tracking stages from crack initiation to penetration. Conclusions: The presented method captures the evolution of surface and internal deformation during the dynamic failure of fractured sandstone. It provides model-based interpretations of the failure process in fractured sandstone and offers preliminary insights into its macroscopic mechanical behavior.</p></div>","PeriodicalId":553,"journal":{"name":"Experimental Techniques","volume":"50 5","pages":"895 - 911"},"PeriodicalIF":1.8,"publicationDate":"2026-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149099027","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}
{"title":"Analysis and Research on the Vibration Characteristics of Carriage Belt Conveyors Under Different Working Conditions","authors":"N. Hao, B. Sun, C. Yu, G. Liu, X. Sun, Y. Zhang","doi":"10.1007/s40799-025-00863-9","DOIUrl":"10.1007/s40799-025-00863-9","url":null,"abstract":"<div><p>The distribution of materials on the conveyor belt of the carriage belt conveyor is uneven. The fluctuations in material flow and speed cause the vibration characteristics between the carriage and the rail to vary with changing operating conditions. This presents higher requirements for the generalization ability and data quality of the model in the study of carriage-rail state detection methods. To investigate the operational vibration characteristics under different working conditions and effectively monitor the carriage’s health status, this paper constructs a coupled dynamic model of the carriage and rail. The model is used to systematically analyze the vibration response characteristics of carriage wheels under different loads and belt speeds, and to examine the ability of various time-domain features of vibration signals to represent different operating conditions of the conveyor. The validity and authenticity of the derived patterns are verified through experiments, providing a theoretical foundation and prior knowledge for subsequent research on carriage and rail condition detection methods.</p></div>","PeriodicalId":553,"journal":{"name":"Experimental Techniques","volume":"50 5","pages":"877 - 893"},"PeriodicalIF":1.8,"publicationDate":"2026-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149099210","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}
{"title":"Fabrication and Characterization of Magnesium-Based Nanocomposite Discs Reinforced with Al2O3 Nanoparticles","authors":"A. Adelkhani, E. Daneshkhah","doi":"10.1007/s40799-025-00852-y","DOIUrl":"10.1007/s40799-025-00852-y","url":null,"abstract":"<div><p>Magnesium (Mg)-based nanocomposites are increasingly used for different applications, including the mechanical and aeronautical industries. In this paper, double-sided pressing was used to fabricate the nanocomposite discs. Various physical properties and the microstructure of these nanocomposites, reinforced with 1.5%, 3%, and 5% aluminum oxide (Al<sub>2</sub>O<sub>3</sub>) nanoparticles, were investigated and compared with the case of pure Mg powder without nanoparticles. Nanocomposite discs were prepared at 250, 500, and 750 MPa, and then sintered at 450 °C for one hour under an atmosphere of argon (99.995%) and hydrogen (0.005%). The density, microhardness, and wear rate of the nanocomposite specimens were carefully evaluated and discussed. Polarization curves were plotted to examine the corrosion rate of the nanocomposite discs. The microstructures of the nanocomposite discs were evaluated using a scanning electron microscope (SEM). The results showed that, due to the uniform dispersion of nanoparticles in the Mg powder, the reinforcement of 3% Al<sub>2</sub>O<sub>3</sub> nanoparticles in the nanocomposite discs led to high microhardness and corrosion resistance. The cases with 5% Al<sub>2</sub>O<sub>3</sub> showed the accumulation and agglomeration of nanoparticles at grain boundaries, resulting in a reduction of microhardness and wear resistance compared to the ones with 3% nanoparticles.</p></div>","PeriodicalId":553,"journal":{"name":"Experimental Techniques","volume":"50 5","pages":"865 - 875"},"PeriodicalIF":1.8,"publicationDate":"2026-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098932","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}
J. Wu, L. Zhang, D. Meng, Y. Tang, W. Li, K. Pei, Z. Zhang
{"title":"In-Line Transmissibility of the Human-Seat System Exposed to Fore-and-Aft and Vertical Vibration: Effects of Large Backrest Inclination, Fore-and-Aft Seat Position and Excitation Magnitude","authors":"J. Wu, L. Zhang, D. Meng, Y. Tang, W. Li, K. Pei, Z. Zhang","doi":"10.1007/s40799-025-00856-8","DOIUrl":"10.1007/s40799-025-00856-8","url":null,"abstract":"<div><p>With the advancement of autonomous driving levels, occupants in intelligent cockpits increasingly adopt large-backrest-inclination postures, necessitating systematic analysis of human-seat system dynamics under non-traditional sitting configurations. This study methodically investigated the effects of backrest inclination (120°, 130°, 140°, 150°), fore-and-aft seat position (front-end, central, back-end positions along the slide rail), and excitation magnitude (0.25 m/s<sup>2</sup>, 0.5 m/s<sup>2</sup>, 1 m/s<sup>2</sup>) on the in-line vibration transmissibility of the human-seat system through vibration platform tests. Based on experimental data from 12 subjects exposed to dual-axis (fore-and-aft/vertical) random vibration within the frequency range of 0.5–50 Hz, it was demonstrated that increased backrest inclination significantly attenuates low-frequency (0–5 Hz) fore-and-aft and high-frequency (15–50 Hz) vertical vibration at the backrest and headrest, while enhancing low-frequency vertical and high-frequency fore-and-aft vibration. Backward seat displacement promotes relaxation of the thigh musculature, resulting in a decrease in the resonance frequencies of thigh fore-and-aft and vertical in-line transmissibility. The resonance frequency and peak transmissibility of the human-seat system generally decrease as excitation magnitude increases, caused by the nonlinear softening of the whole-body musculature.</p></div>","PeriodicalId":553,"journal":{"name":"Experimental Techniques","volume":"50 5","pages":"849 - 864"},"PeriodicalIF":1.8,"publicationDate":"2026-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098754","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}
{"title":"Exploration of Vibration Damping Properties in 3D Printed TPMS Damper with Particle Impact","authors":"L. Li, C. Song, J. Sun, V. Sivalingam, S. Peiqin","doi":"10.1007/s40799-025-00858-6","DOIUrl":"10.1007/s40799-025-00858-6","url":null,"abstract":"<div><p>Periodic porous structures have great potential applications in aerospace, energy engineering, and the auto industry, This is own to their multifunctional properties, such as vibration attenuation and energy absorption. However, their applications are limited by the fixed damping characteristics inherent to the structures. Therefore, this paper proposes a damping-tunable particle-impacted tri-periodic minimal surface (TPMS) structure for damping. This innovative study investigates the influence of TPMS structural parameters on the damping ratio of particle dampers, while also considering factors such as TPMS particle size and packing density. The tunable damping characteristics of TPMS particle impact dampers(TPMS-PID) are investigated and validated. The damping performance of TPMS-PID is verified by the cantilever beam experiment system. It is indicated that the damping ratio of the TPMS-PID cantilever beam system (TPMS-PIDCBS) increases with a decrease of particle diameter and the TPMS design parameters. Under different particle diameters and TPMS structure design parameters, the damping ratio increases first and then decreases as the filling rate increases, reaching a maximum at a 70% filling ratio. To validate the vibration reduction effectiveness of a type of TPMS-PID with structural design parameters of c = 0.1, two exciting methods of harmonic and linear sweep excitation are used. Under the harmonic excitation experiment, vibration reduction rate exceeding 79% was achieved. Under linear sweep excitation, a vibration reduction rate exceeding 79% was achieved. This confirms the superior and robust performance of the proposed TPMS-PID.</p></div>","PeriodicalId":553,"journal":{"name":"Experimental Techniques","volume":"50 5","pages":"831 - 847"},"PeriodicalIF":1.8,"publicationDate":"2026-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149099096","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}
{"title":"A Combined Simulation and Experimental Approach for Predicting the Resonance Frequency and Blade Tip Amplitude of Surgical Ultrasonic Dissectors","authors":"Y. C. Lee, F. Y. Chang, Y. H. Sun, C. W. Liu","doi":"10.1007/s40799-025-00861-x","DOIUrl":"10.1007/s40799-025-00861-x","url":null,"abstract":"<div><p>Ultrasonic dissectors play a key role in minimally invasive medical procedures and typically operate at extremely high frequencies in the range of 55,000 to 56,000 Hz. Accurate measurement of the blade tip amplitude and frequency is essential for optimizing the performance and safety. However, a review of current literature reveals two significant deficiencies: the lack of comprehensive blade tip amplitude simulation and measurement and the absence of a standardized method for the quantitative assessment of cutting efficiency. With regards to the first key deficiency, the present study proposes a novel analytical method for predicting the longitudinal tip displacement as a function of the actuating frequency. In the proposed approach, a modal analysis is first performed using ANSYS software to determine the natural frequency, displacement distribution, and amplification of the ultrasonic dissector under specified settings of the material properties, boundary conditions, and mesh parameters. Harmonic analyses are then proposed to verify the vibration frequency and calculate the tip amplitude of the dissector. The results show that the deviation between the average simulated resonant frequency and the experimental results is only 0.42%, confirming the high accuracy of the proposed model. The harmonic analysis yields an amplitude magnification factor of 4.54, with percentage deviations of 0.88% and 1.30% in the low- and high-power modes, respectively, relative to experimental results. Furthermore, the vibration behavior exhibits sensitivity to thermal variations; as the internal core temperature increases from 20 °C to 60 °C, the tip amplitude decreases by approximately 1.24–3.32%, depending on the operating power mode.</p></div>","PeriodicalId":553,"journal":{"name":"Experimental Techniques","volume":"50 5","pages":"819 - 830"},"PeriodicalIF":1.8,"publicationDate":"2025-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149099003","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}
{"title":"Towards Dynamic Calibration of Force Transducers: Self Error Correction Using the Second Derivative of Sensor Output","authors":"Y. Fujii","doi":"10.1007/s40799-025-00860-y","DOIUrl":"10.1007/s40799-025-00860-y","url":null,"abstract":"<div><p>The dynamic calibration method for force transducers is still under development, and several approaches have been proposed and investigated. In previous studies, impact response experiments of a strain gauge–type force transducer were conducted using an optical interferometer, and it was demonstrated that the measurement error in impact-force testing can be estimated and corrected by using the second derivative of the transducer output itself. In the present study, the results of a step response evaluation experiment performed on the same transducer were reanalyzed. The results show that the large dynamic error observed in the rising part of the first peak of the damped oscillation can be successfully estimated and corrected by multiplying the second derivative of the transducer output itself by the dynamic parameter of the transducer obtained from the previous impact response experiment. The finding that most of the dynamic error in the step response, as well as in the impact response, can be estimated and corrected from the transducer output itself represents a significant contribution toward establishing a dynamic calibration method for force transducers. Based on this finding, a pathway toward establishing a reliable dynamic force calibration method is discussed.</p></div>","PeriodicalId":553,"journal":{"name":"Experimental Techniques","volume":"50 5","pages":"811 - 818"},"PeriodicalIF":1.8,"publicationDate":"2025-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149099004","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}
{"title":"Optimization of Finite Element Mesh for Residual Stress Measurement Using Contour Method","authors":"Z. Luo, C. Liu, J. Li, X. Li, X. Ji","doi":"10.1007/s40799-025-00859-5","DOIUrl":"10.1007/s40799-025-00859-5","url":null,"abstract":"<div><p>Stress reconstruction using finite element (FE) simulation is the critical step during residual stress measurement with contour method (CM). The quality of the FE mesh influences the accuracy of CM. There are no guidelines or suggestions to be referred to meshing the FE model for CM stress construction to improve the measurement accuracy. This study aims to distinguish the effects of FE mesh on the measurement accuracy with CM and give an optimal meshing scheme for the FE model of CM by balancing measurement accuracy and computation efficiency. A four-point bending beam was simulated to obtain the initial residual stress field. Then the CM measurement procedure was simulated with the pre-stressed bending beam model and the effects of FE mesh on the final constructed stress of CM were studied. Finally, the optimal meshing scheme in different regions of the bending beam was obtained. Results shows that the FE model employing the mapped mesh with the deformation measuring spacing in the cutting plane, mapped mesh with minimum sizes ranging from 0.01 mm to 0.09 mm in the direction normal to the cutting plane in the adjacent region of the cutting plane, and free mesh in the remaining 85% of the model length can reduce the root mean square stress by approximately 12% and control the relative error of peak stress within 4%. The proposed meshing scheme is applied to the CM stress constructions of an edge autogenously welded stainless steel beam, a multi-pass butt-welded high-strength steel plate, and a linear friction welded titanium alloy plate joint. It is found the peak stresses are underestimated with the conventional FE model.</p></div>","PeriodicalId":553,"journal":{"name":"Experimental Techniques","volume":"50 3","pages":"481 - 502"},"PeriodicalIF":1.9,"publicationDate":"2025-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148060696","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}
{"title":"Optimization Design of Vibration Characteristics of New Energy Lithium Batteries Based on SCSO-BP Machine Learning Based on Pareto Classification and Genetic Algorithm","authors":"G. Yuanyuan, L. Na, L. Peng","doi":"10.1007/s40799-025-00840-2","DOIUrl":"10.1007/s40799-025-00840-2","url":null,"abstract":"<div><p>This study introduces an integrated methodological framework to address critical mechanical challenges in ternary lithium battery enclosures. The approach initiates with a variable-density topology optimization platform implemented through Minimalist GNU for Windows 64-bit (MingW-W64), incorporating Latin hypercube sampling for efficient design space exploration. A meticulously calibrated non-dominated sorting genetic algorithm (NSGA-II) performs multi-objective optimization, simultaneously minimizing von-mises stress concentration while maximizing structural stiffness as competing design criteria. The framework employs Gaussian process-based Kriging interpolation to construct high-fidelity response surfaces, facilitating the identification of Pareto-optimal configurations. Subsequently, a 60-parameter back propagation (BP) neural network optimized via Sand Cat Swarm Optimization (SCSO) demonstrates exceptional predictive accuracy. Comprehensive dynamic validation incorporates triaxial random vibration testing (X/Y/Z axes per ISO 19453-6:2020 standards), with accompanying finite element analysis quantifying key performance metrics including stress amplification factors (SAF < 2.5), displacement spectra, and component-level safety margins. Comparative simulation results reveal statistically significant improvements in the optimized design, including reduced stress concentrations, enhanced natural frequency characteristics, and superior stiffness-to-mass ratios relative to baseline configurations. The final design maintains full compliance with critical electrical safety requirements while demonstrating robust reliability for industrial applications.</p></div>","PeriodicalId":553,"journal":{"name":"Experimental Techniques","volume":"50 5","pages":"791 - 810"},"PeriodicalIF":1.8,"publicationDate":"2025-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149099101","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}
F. Trainotti, J. Marinko, T. Slimak, D. J. Rixen, C. Forsteneichner, A. Gordner
{"title":"A Structured Methodology for the Experimental Characterization and Modeling of Industrial Rubbers","authors":"F. Trainotti, J. Marinko, T. Slimak, D. J. Rixen, C. Forsteneichner, A. Gordner","doi":"10.1007/s40799-025-00857-7","DOIUrl":"10.1007/s40799-025-00857-7","url":null,"abstract":"<div><p>Rubber materials are critical in industrial applications, including aerospace and automotive sectors, due to their exceptional flexibility, durability, and energy-absorbing capabilities. However, the accurate characterization and modeling of rubbers remains challenging due to their complex mechanical behavior, which is influenced by factors like strain, strain rate, temperature, and environmental conditions. The state-of-the-art encompasses a wide range of testing approaches, from material-level dynamic mechanical analysis to component-level vibration-based tests, and various modeling strategies, including hyperelastic, viscoelastic and viscoplastic formulations. These methods aim to capture rubber’s nonlinear, time-, frequency-, and temperature-dependent properties for finite element simulations, but practical implementation remains resource-intensive and non-standardized. This article proposes an engineering workflow for material-level characterization, modeling and finite element implementation of industrial rubbers. Key contributions include the development of a linearized equivalent viscoelastic approach, supported by a quasi-zero pre-compression testing protocol for dynamic shear measurements. The study integrates (hyper-) elastic, viscoelastic, and elastoplastic modeling approaches with explicit temperature dependence, and employs a versatile calibration process that integrates in-house and open-source tools with features from commercial software like Abaqus. The workflow provides insights into test parameters and uncertainties, modeling conditions, and material card development, ensuring precision and adaptability to various simulation environments. The paper offers a structured overview of each step, highlighting assumptions, benefits, and limitations of the proposed procedure, enabling more informed decision-making for rubber material design and simulation.</p></div>","PeriodicalId":553,"journal":{"name":"Experimental Techniques","volume":"50 5","pages":"763 - 790"},"PeriodicalIF":1.8,"publicationDate":"2025-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s40799-025-00857-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098753","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}