Article
Engineering, Industrial
Yusuf Altintas, Derry Lappin, David van Zyl, Dan Ostling
Summary: This study introduces a boring bar system with a tuned mass damper to achieve chatter-free cutting by automatically adjusting the internal vibration absorber, improving efficiency.
CIRP ANNALS-MANUFACTURING TECHNOLOGY
(2021)
Article
Automation & Control Systems
Sajad Hayati, Mehdi Shahrokhi, Ali Hedayati
Summary: A novel boring bar was developed with an internal frictional damping structure to reduce chatter in machining processes. Experimental comparisons showed that the proposed tool exhibited higher performance in modal and cutting tests compared to a regular boring bar.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Materials Science, Textiles
Licheng Lu, Can Ni, Gang Liu, Bo Qian, Qinglong An, Zhenzhen Cao, Liqiang Zhang, Junli Li
Summary: A novel boring bar with composites and a constrained layer damping structure was fabricated to suppress vibrations during the boring operation. The cutting stability of the CFRP boring bar was significantly improved according to modal and cutting tests.
FIBERS AND POLYMERS
(2023)
Article
Acoustics
Zsolt Iklodi, David A. W. Barton, Zoltan Dombovari
Summary: This paper investigates the impact of displacement constraints on the attenuation performance of tuned mass dampers (TMDs) in boring and turning applications. Through time domain simulations and hybrid periodic orbit continuation, it is found that rigid body collisions can significantly hinder TMD damping performance and lead to resonance problems or machine tool chatter.
JOURNAL OF SOUND AND VIBRATION
(2022)
Article
Engineering, Manufacturing
Asier Astarloa, Alptunc Comak, Iker Mancisidor, Maria Helena Fernandes, Jokin Munoa, Zoltan Dombovari
Summary: This study proposes using mode coupling effect to increase damping, stabilize the machining process, and optimize tool length and material to improve cutting stability in boring operations.
CIRP JOURNAL OF MANUFACTURING SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Mechanical
Mohsen Fallah, Behnam Moetakef-Imani
Summary: This article presents a control system for nonlinear dynamics and active control of boring bar chatter, utilizing a novel parameter-varying transfer function to model the nonlinear dynamics of the forward path. The study shows that using an optimally tuned DVF controller efficiently attenuates vibrations, improves the dynamic stiffness of the cutting tool, and is experimentally verified on Aluminum alloy 6063-T6.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2021)
Article
Automation & Control Systems
Asier Astarloa, Fagher Wahab, Iker Mancisidor, Maria Helena Fernandes, Inigo Etxaniz, Jokin Munoa
Summary: Boring operations are often limited by chatter vibrations caused by the flexibility of boring bars. Passive tuned mass dampers near the tool tip have been proposed as a solution, but they need to be tuned for a specific frequency for each bar. This work presents the development of an active inertial damper based on reluctance, which offers stability improvement over a broad frequency range, enabling chatter-free boring operations at different bar overhangs.
IEEE-ASME TRANSACTIONS ON MECHATRONICS
(2023)
Article
Engineering, Industrial
Mostafa K. A. Saleh, Mona Nejatpour, Havva Yagci Acar, Ismail Lazoglu
Summary: A new magnetorheological damper is introduced in this article to increase the stability of the boring process in deep hole boring, demonstrating improvements in damping and dynamic stiffness of the system, significantly increasing the depth of cut without chatter.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2021)
Article
Engineering, Multidisciplinary
Wataru Takahashi, Norikazu Suzuki, Eiji Shamoto
Summary: Prototypes of boring tools with anisotropic dynamic stiffness were developed in this study, and their chatter stability was investigated. The novel design of boring tools significantly improved stability compared to conventional tools, but further improvements in dynamic characteristics are necessary for chatter-free cutting. High L/D ratio tools also require enhancements in dynamic stiffness for stable boring.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2021)
Article
Engineering, Multidisciplinary
Wataru Takahashi, Norikazu Suzuki, Eiji Shamoto
Summary: This paper introduces a novel design method for anisotropic structure to improve the dynamic stiffness of boring tools, with the goal of enhancing efficiency in boring operations.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2021)
Article
Engineering, Manufacturing
David Van Zyl, Yusuf Altintas, Dan Ostling
Summary: This paper presents a tunable and parametric digital design of boring bars with tuned mass dampers (TMD) to increase their resistance against chatter. The mathematical model and experimental verification are used to determine the optimal TMD natural frequency and damping ratio for achieving chatter-free depth of cut.
CIRP JOURNAL OF MANUFACTURING SCIENCE AND TECHNOLOGY
(2022)
Article
Automation & Control Systems
Jinqiu Pan, Che Chen, Zhibing Liu, Xibin Wang
Summary: A dynamic model considering the regenerative effect was constructed in this study to determine the relationship between the limited cutting width and the spindle speed. Various sensors were applied to propose a feasible monitoring scheme for vibration, and the collected signals were analyzed in the time and frequency domain to determine the pattern of time-frequency variation caused by vibration.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Engineering, Industrial
Mostafa K. A. Saleh, Abasin Ulasyar, Ismail Lazoglu
Summary: This article presents a sliding mode control of a magnetorheological fluid damper for actively damping chatter in the boring process. Simulations and validation cutting tests demonstrate that the controller has fast response and robustness against disturbances, significantly increasing the stability limit with the sliding mode control of the magnetorheological fluid damper.
CIRP ANNALS-MANUFACTURING TECHNOLOGY
(2021)
Article
Engineering, Manufacturing
Eymen Akdeniz, Hakan Arslan
Summary: This paper investigates the effectiveness of using TiNi3 alloy as the turning tool holder material to reduce vibration in turning operations. Analytical and numerical studies show that TiNi3 alloy effectively decreases vibration amplitude and acceleration, leading to improved performance and reduced negative impact of vibrations on the turning process.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE
(2023)
Article
Mechanics
Jinfeng Zhang, Zhong Wang, Chao Feng, Junlei Jia, Zhenfang Tong, Yongsheng Ren, Peisi Zhong, Xionglong Cao
Summary: The nonlinear dynamic analysis of rotating composite boring round bar containing carbon nanotubes (CNTs) in boring system is investigated. The study explores the effect of CNTs inclusion on the dynamic behavior of the boring process and suggests ways to enhance the stability of the process.
ARCHIVE OF APPLIED MECHANICS
(2023)
Article
Mechanics
J. Fernandez-Perez, J. Diaz-Alvarez, M. H. Miguelez, J. L. Cantero
Summary: This study analyzed the influence of cutting parameters on tool wear mechanisms and machining-induced damage in CFRP drilling. The goal is to optimize cutting parameters and real-time control of the drilling process.
COMPOSITE STRUCTURES
(2021)
Article
Mechanics
Miguel Marco, Ricardo Belda, Maria Henar Miguelez, Eugenio Giner
Summary: This study analyzed the mechanical properties of various lattice and porous structures using the finite element method, showing that different cavity distributions have a significant impact on the mechanical behavior of the structures.
COMPOSITE STRUCTURES
(2021)
Article
Polymer Science
Matias Braun, Josue Aranda-Ruiz, Jose Fernandez-Saez
Summary: The fracture behavior of polymeric materials has been extensively studied through numerical and experimental analysis. A newly developed discrete numerical model successfully overcomes the limitations in material Poisson's coefficient selection, showing close agreement with experimental results in simulating quasi-static fracture problems.
Article
Materials Science, Multidisciplinary
I Rubio Diaz, M. Rodriguez-Millan, A. Rusinek, M. H. Miguelez, J. A. Loya
Summary: This work validates a numerical model for aramid composites by studying permanent deformation, energy absorption, and damage mechanisms particularly for ballistic applications. It presents novel experimental and numerical results from non-perforating ballistic impacts with blunt projectiles, measuring resistance forces and absorption energy at different impact velocities. A postmortem analysis of failure mechanisms is conducted using computed tomography and a profilometer device, while the numerical model is utilized to analyze the impact of impactor mass and velocity below the ballistic limit.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Review
Chemistry, Multidisciplinary
J. N. Reddy, Eugenio Ruocco, Jose A. Loya, Ana M. A. Neves
Summary: This review paper presents the governing equations and analytical solutions of the classical and shear deformation theories of functionally graded straight beams. The theories account for through-thickness material variation, strain gradient effects, and nonlinearity. Analytical solutions for bending, some of which are not commonly available, demonstrate the influence of material variation, boundary conditions, and loads.
APPLIED SCIENCES-BASEL
(2021)
Article
Materials Science, Multidisciplinary
Liu Jiao-Wang, Jose Antonio Loya, Carlos Santiuste
Summary: This work aims to analyze the influence of the cross-section shape of a fully biodegradable composite bumper beam. Flax/PLA bumper beams with four different degrees of roundness were manufactured. Specimens were subjected to low velocity impacts and the post-impact behavior was evaluated through three-point bending tests. The results indicate that different cross-section shapes can be selected depending on whether the objective is to maximize impact performance or post-impact residual properties.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Engineering, Mechanical
J. A. Loya, J. Aranda-Ruiz, R. Zaera
Summary: This study analyzes the dynamic behavior of cracked Timoshenko beams immersed in a Winkler elastic medium and obtains their natural frequencies of bending vibration. By modeling the beam as two segments connected by springs and considering the discontinuity of displacement and rotation due to bending, the differential equations for free vibration are solved. The proposed methodology allows for calculating the natural frequencies as a function of support type, soil stiffness, crack position, and initial crack length. The results are compared to other simplified models, highlighting the interaction and importance of the parameters considered in the system's natural frequencies.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2022)
Article
Chemistry, Physical
Liu Jiao-Wang, Jose A. Loya, Carlos Santiuste
Summary: This study focuses on developing a numerical model to predict the failure modes of green composite bumper beams with different cross sections. The finite element model was validated against experimental results and used to analyze the impact energy and cross-section roundness on the failure modes.
Article
Chemistry, Analytical
Belen Munoz-Abella, Laura Montero, Patricia Rubio, Lourdes Rubio
Summary: In this work, a method to obtain an accurate value of the critical speed of a cracked shaft is proposed. The method relies on observing the transversal displacements of the cracked section when the shaft is rotating at submultiples of the critical speed. The results show that the critical speed decreases with the severity of the crack. Additionally, it is found that in practical applications, only one sensor measuring displacement in one direction (vertical or horizontal) is needed to determine the critical speed.
Article
Mathematics
Belen Munoz-Abella, Lourdes Rubio, Patricia Rubio
Summary: This study develops two closed-form solutions for determining the first two natural frequencies of flapwise bending vibration in a cracked Euler-Bernoulli beam at low rotational speed. The Frobenius method is used to solve the governing differential equations of motion. The crack is modeled using two undamaged parts of the beam connected by a rotational spring. Two novel polynomial expressions are developed to calculate the first two natural frequencies as a function of angular velocity, slenderness ratio, cube radius, and crack characteristics. These expressions are formulated using multiple regression techniques.
Article
Engineering, Mechanical
M. Rodriguez-Millan, I. Rubio, F. J. Burpo, A. Olmedo, J. A. Loya, K. K. Parker, M. H. Miguelez
Summary: Different pad systems for combat helmets were studied to analyze their ballistic performance in terms of mitigating head accelerations. The results showed that thicker bicomponent polyurethane foams and honeycomb configuration provided the best results in reducing brain damage due to accelerations. However, it was concluded that there is no risk of cervical injury or cranial fracture for any of the cases studied.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Engineering, Mechanical
M. Rodriguez-Millan, I. Rubio, F. J. Burpo, K. M. Tse, A. Olmedo, J. A. Loya, K. K. Parker, M. H. Miguelez
Summary: In this study, a Hybrid III dummy head and neck were used to assess the performance of combat helmets against ballistic impact from live ammunition at different locations, considering two different thicknesses of the padding system. A numerical model including a helmet and a Hybrid III head and neck was developed and validated with experimental data. The results revealed that rear impacts pose the highest risk of brain damage, and the effect of pad thickness is closely related to various factors such as energy absorption, backface deformation, contact force, and head acceleration.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Mathematics, Interdisciplinary Applications
Jose Antonio Loya, Carlos Santiuste, Josue Aranda-Ruiz, Ramon Zaera
Summary: This study analyzes the buckling behavior of cracked Euler-Bernoulli columns immersed in a Winkler elastic medium and obtains their buckling loads. The beam is modeled as two segments connected by a mass-less rotational spring at the cracked section, with the rotation proportional to the bending moment transmitted through the crack. The methodology proposed allows for calculating the buckling load based on the support type, elastic soil parameter, crack position, and initial crack length, and the results highlight the interaction and importance of these parameters.
MATHEMATICAL AND COMPUTATIONAL APPLICATIONS
(2023)
Article
Materials Science, Composites
J. N. Reddy, Eugenio Ruocco, Jose Antonio Loya, Ana M. A. Neves
Summary: This paper presents the governing equations and analytical solutions of the classical and shear deformation theories of functionally graded axisymmetric circular plates. Analytical solutions are included to demonstrate the influence of material variation, boundary conditions, and loads in bending for the classical, first-order, and third-order shear deformation theories.
COMPOSITES PART C: OPEN ACCESS
(2021)
Article
Engineering, Mechanical
Xuanen Kan, Yanjun Lu, Fan Zhang, Weipeng Hu
Summary: A blade disk system is crucial for the energy conversion efficiency of turbomachinery, but differences between blades can result in localized vibration. This study develops an approximate symplectic method to simulate vibration localization in a mistuned bladed disk system and reveals the influences of initial positive pressure, contact angle, and surface roughness on the strength of vibration localization.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Zimeng Liu, Cheng Chang, Haodong Hu, Hui Ma, Kaigang Yuan, Xin Li, Xiaojian Zhao, Zhike Peng
Summary: Considering the calculation efficiency and accuracy of meshing characteristics of gear pair with tooth root crack fault, a parametric model of cracked spur gear is established by simplifying the crack propagation path. The LTCA method is used to calculate the time-varying meshing stiffness and transmission error, and the results are verified by finite element method. The study also proposes a crack area share index to measure the degree of crack fault and determines the application range of simplified crack propagation path.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Rongjian Sun, Conggan Ma, Nic Zhang, Chuyo Kaku, Yu Zhang, Qirui Hou
Summary: This paper proposes a novel forward calculation method (FCM) for calculating anisotropic material parameters (AMPs) of the motor stator assembly, considering structural discontinuities and composite material properties. The method is based on multi-scale theory and decouples the multi-scale equations to describe the equivalence and equivalence preconditions of AMPs of two scale models. The effectiveness of this method is verified by modal experiments.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Hao Zhang, Jiangcen Ke
Summary: This research introduces an intelligent scheduling system framework to optimize the ship lock schedule of the Three Gorges Hub. By analyzing navigational rules, operational characteristics, and existing problems, a mixed-integer nonlinear programming model is formulated with multiple objectives and constraints, and a hybrid intelligent algorithm is constructed for optimization.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Jingjing He, Xizhong Wu, Xuefei Guan
Summary: A sensitivity and reliability enhanced ultrasonic method has been developed in this study to monitor and predict stress loss in pre-stressed multi-layer structures. The method leverages the potential breathing effect of porous cushion materials in the structures to increase the sensitivity of the signal feature to stress loss. Experimental investigations show that the proposed method offers improved accuracy, reliability, and sensitivity to stress change.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Benyamin Hosseiny, Jalal Amini, Hossein Aghababaei
Summary: This paper presents a method for monitoring sub-second or sub-minute displacements using GBSAR signals, which employs spectral estimation to achieve multi-dimensional target detection. It improves the processing of MIMO radar data and enables high-resolution fast displacement monitoring from GBSAR signals.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Xianze Li, Hao Su, Ling Xiang, Qingtao Yao, Aijun Hu
Summary: This paper proposes a novel method for bearing fault identification, which can accurately identify faults with few samples under complex working conditions. The method is based on a Transformer meta-learning model, and the final result is determined by the weighted voting of multiple models.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Xiaomeng Li, Yi Wang, Guangyao Zhang, Baoping Tang, Yi Qin
Summary: Inspired by chaos fractal theory and slowly varying damage dynamics theory, this paper proposes a new health monitoring indicator for vibration signals of rotating machinery, which can effectively monitor the mechanical condition under both cyclo-stationary and variable operating conditions.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Hao Wang, Songye Zhu
Summary: This paper extends the latching mechanism to vibration control to improve energy dissipation efficiency. An innovative semi-active latched mass damper (LMD) is proposed, and different latching control strategies are tested and evaluated. The latching control can optimize the phase lag between control force and structural response, and provide an innovative solution to improve damper effectiveness and develop adaptive semi-active dampers.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Menghao Ping, Xinyu Jia, Costas Papadimitriou, Xu Han, Chao Jiang, Wang-Ji Yan
Summary: Identification of non-Gaussian processes is a challenging task in engineering problems. This article presents an improved orthogonal series expansion method to convert the identification of non-Gaussian processes into a finite number of non-Gaussian coefficients. The uncertainty of these coefficients is quantified using polynomial chaos expansion. The proposed method is applicable to both stationary and nonstationary non-Gaussian processes and has been validated through simulated data and real-world applications.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Lei Li, Wei Yang, Dongfa Li, Jianxin Han, Wenming Zhang
Summary: The frequency locking phenomenon induced by modal coupling can effectively overcome the dependence of peak frequency on driving strength in nonlinear resonant systems and improve the stability of peak frequency. This study proposes the double frequencies locking phenomenon in a three degrees of freedom (3-DOF) magnetic coupled resonant system driven by piezoelectricity. Experimental and theoretical investigations confirm the occurrence of first frequency locking and the subsequent switching to second frequency locking with the increase of driving force. Furthermore, a mass sensing scheme for double analytes is proposed based on the double frequencies locking phenomenon.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Kai Ma, Jingtao Du, Yang Liu, Ximing Chen
Summary: This study explores the feasibility of using nonlinear energy sinks (NES) as replacements for traditional linear tuned mass dampers (TMD) in practical engineering applications, specifically in diesel engine crankshafts. The results show that NES provides better vibration attenuation for the crankshaft compared to TMD under different operating conditions.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Wentao Xu, Li Cheng, Shuaihao Lei, Lei Yu, Weixuan Jiao
Summary: In this study, a high-precision hydraulic mechanical stand and a vertical mixed-flow pumping station device were used to conduct research on cavitation signals of mixed-flow pumps. By analyzing the water pressure pulsation signal, it was found that the power spectrum density method is more sensitive and capable of extracting characteristics compared to traditional time-frequency domain analysis. This has significant implications for the identification and prevention of cavitation in mixed-flow pump machinery.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Xiaodong Chen, Kang Tai, Huifeng Tan, Zhimin Xie
Summary: This paper addresses the issue of parasitic motion in microgripper jaws and its impact on clamping accuracy, and proposes a symmetrically stressed parallelogram mechanism as a solution. Through mechanical modeling and experimental validation, the effectiveness of this method is demonstrated.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Zhifeng Shi, Gang Zhang, Jing Liu, Xinbin Li, Yajun Xu, Changfeng Yan
Summary: This study provides useful guidance for early bearing fault detection and diagnosis by investigating the effects of crack inclination and propagation direction on the vibration characteristics of bearings.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
