Jose Manuel Abete

• PhD
• Professor at Mondragon University

In the last few years, the industry requires to know in real-time the condition of their assets. Acoustic Emission (AE) technique has been widely used to understand the real-time condition of manufacturing processes such as the degree of tool wear or tool breakage. Traditionally, to fulfil that goal, the information extracted from the signal sensor...

Process stability and facility security are the two main purposes for measuring the force in sheet metal forming facilities. These two purposes look for guaranteeing the good health of the facility avoiding overloads and at the same time look for variations in the process force that could lead to products out of the demanded quality. Traditionally...

In a context where industrial production boosts both the society and the economy of a country, improvements in industrial processes are key factors for efficient and reliable development of goods and products. New industrial processes and machines must be evaluated before deployment at large production scales. This paper proposes a new optimized de...

Polymer-based composites reinforced with nanocarbonaceous materials can be tailored for functional applications. Poly(vinylidene fluoride) (PVDF) reinforced with carbon nanotubes (CNT) or graphene with different filler contents have been developed as potential piezoresistive materials. The mechanical properties of the nanocomposites depend on the P...

Polymer-based composites reinforced with nanocarbonaceous materials can be tailored for functional applications. Poly(vinylidene fluoride) (PVDF) reinforced with carbon nanotubes (CNT) or graphene with different filler contents have been developed as potential piezoresistive materials. The mechanical properties of the nanocomposites depend of the P...

Chatter vibrations produced during turning of slender parts cause poor workpiece surface finishing and premature tool wear. In this paper, mode coupling in flexible workpiece metal cutting without tailstock is analysed in the state-space domain. The proposed mode coupling model considers mode rotation with the workpiece. Closed form equations are o...

The ability to monitor the quality of the metal forming process as well as the machine's condition is of significant importance in modern industrial processes. In the case where a physical device (i.e. sensor) cannot be deployed due to the characteristics of the system, models that rely on the estimation of both the applied force and the dynamic be...

Servo presses have been widely used in engineering applications due to the flexibility, simplicity in construction, and control easiness they provide to address a vast range of different metal forming processes. Their kinematic and dynamic behaviour has tightly to do with the quality of the produced part and the press condition. Therefore, the moni...

The process of ultraviolet (UV) cured out of die bent pultrusion allows manufacturing bent composite parts with variable curvatures. Yet, the process is still quite new and there is a lack in the control of the curing degree of the material, with reliable sensing feedback. Moreover, monitoring the degree of cure of the composite is of great importa...

Unlike brake squeal, brake-clutch squeal has rarely been studied, even though the cause of squeal noise is identical – dry friction acting at the contact interface. In this paper, a combined theoretical and experimental study is reported on squeal noise of a brake-clutch. On the theoretical side, a receptance-based inverse dynamic method is adopted...

Lamb waves are dispersive waves that propagate parallel to the surface of the material. The propagation medium filters the excitation signal, and depending on the excitation waveform it is well known that tails with defined spectral components might show up limiting the frequency of Lamb wave inspections. Spatial resolution of the analyzed structur...

A novel self-tuning technique for Lamb wave inspection especially appropriate for anisotropic materials such as some composites is presented. Propagation speeds for the different Lamb modes are in-situ tuned for the different directions, covering the whole azimuth range. By performing a frequency sweep, optimal frequencies for working with each wav...

Noise similar to automotive brake squeal can be found in industrial brake-clutches. Although similar study methodology can be used in this field, there is a need to develop a specific model that captures the distinguishing features of this problem, such as the ring shaped contact area and the asymmetric boundary conditions. Seeking this objective...

Vertical vibrations affect passenger comfort during an elevator travel. This work presents the results of a study of vertical vibrations caused by torque ripple generated at the elevator drive system. Tests are performed on a 1:1 roping configuration laboratory model; the acceleration response at the suspended masses and at the drive machine, the m...

In this paper vertical vibration measurements performed on a laboratory model of an elevator system have been presented and analysed. The laboratory model consists of a machine system that drives two rigid masses representing an elevator car and a counterweight, constrained by guide rails to move vertically through a sheave and hoist rope. Simultan...

Brake - Clutches exhibit in several cases undesirable high frequency noise phenomena. The nature of this noise it is assumed to be similar to the squeal produced in transports. In the state of the art hundreds of references can be found in order to study and solve squeal problems in different ways of transport like auto motion, railways or plain...

This paper is aimed at exploring the interconversion path between the relaxation modulus E(t) and the corresponding complex modulus E ∗(ω) for linear viscoelastic solid materials. In contrast to other approximate methods, the fast Fourier transform (FFT) algorithm is directly applied on the time-dependent part of the viscoelastic response R(t). Fir...

Vertical vibrations affect passenger comfort during an elevator travel. In this work the results of a study to investigate the vertical vibrations caused by torque ripple generated at the drive system and transmitted through the suspension ropes to the car is presented. The acceleration response at the suspended masses and at the drive machine end...

Vertical vibrations affect passenger comfort during an elevator travel. Hoist ropes, due to their flexibility, loading conditions, and relatively low internal damping characteristics, largely determine the resonances within the system and, therefore, the amount of vibration. In this work the results of a study to investigate the vertical vibration...

The main objective of this paper is to investigate a way to characterize experimentally the mechanical behavior of low modulus adhesives. In this context, the relaxation and complex moluli master curves of a SIKAFLEX® 505 adhesive are obtained by means of dynamic mechanical thermal analysis. Firstly, the procedure carried out to prepare and to vali...

Health Monitoring (HM) is becoming recognized as an efficient strategy for increasing reliability and improving maintenance of Electro Mechanical Actuators (EMAs) in the aeronautical industry. For ball screw based EMAs, the size of the axial play increases under normal operation due to wear, being susceptible to be employed as a degradation level i...

This paper presents the analytic solution together with two finite element formulations to obtain the dynamic response of an exponentially damped solid rod. The analysis is carried out in time domain, the material being modeled by the standard linear viscoelastic solid model. On the one hand, the analytic solution is reached by means of modal super...

Ice creation on aircraft components may affect flight conditions and produce fatal effects. Deicing of these components can be carried out in several ways. One of these ways is to produce vibrations by using lightweight piezoelectric actuators. These actuators can excite the structures in their natural frequencies, resulting in the rupture of the w...

This paper is aimed at investigating the influence of nonviscous modes on the vibrational response of viscoelastic systems. Thus, exponential damping models are considered. Provided that nonviscous modes disappear with time, they have influence on only the transient response of the system. Thus, the system response is obtained by means of modal sup...

Improving the fidelity of numerical simulations using available test data is an important activity in the overall process of model verification and validation. While model updating or calibration of linear elastodynamic behaviors has been extensively studied for both academic and industrial applications over the past three decades, methodologies ca...

In this paper, the experimental characterization and modelization of the relaxation and complex moduli of the flexible adhesive ISR 70-03 by means of dynamic mechanical thermal analysis technique (DMTA) is presented. Firstly, the procedure followed to obtain and to validate the test specimens is described. Next, the linearity concerning material be...

The drive system is a key component of an elevator installation that supplies energy into the system, coupling the car-rope and the counterweight-rope subsystems. However, it often becomes a source of excitation that is responsible for vibrations that compromise the car ride quality. In this paper a non-stationary distributed-parameter model descri...

A non-stationary distributed model of the vibration of an elevator system that accommodates the following aspects has been developed: machine and drive dynamics, the longitudinal response of the rope-car-counterweight system, the coupling effects across the traction sheave and the response to excitation sources such as the torque ripple. Hamilton’s...

Despite being able to develop highly detailed Finite Element (FE) models thanks to the ever increasing computer capabilities, the analyst's confidence in the results obtained with these models is still limited. In order to improve the reliability of numerical models, uncertainty quantification is a practice that has been used for several decades. P...

In this paper, mode-coupling in orthogonal metal cutting is analyzed in the state-space domain. Closed-form equations are obtained for eigenvalues and eigenvectors of the joint system formed by the cutting process and the mechanical structure, as a function of cutting conditions and structure modal parameters. System stability is analyzed and varia...

A non-stationary distributed model of the longitudinal vibration of a lift system that includes the dynamics of the drive machine is developed. The non-stationary character of the system is due to the time-varying length of the suspension cables. The input to the system is the machine torque and the output is the displacement of any point of either...

This communication presents a classic experimental multi-reference modal analysis of an elevator in order to contrast it with operational modal analysis. The purpose of this analysis is to compare both techniques in order to study an elevator's vibrational characteristics attending to the increasing comfort level requests. The experimental modal an...

Despite the availability of complex and highly detailed finite element models to guide the analyst in the design and diagnosis of their real physical counterparts, establishing the credibility of model-based decisions still remains a delicate process. This is essentially due to the presence of a wide variety of uncertainties, both aleatory and epis...

It is believed that the acoustic emissions (AE) signal contains potentially valuable information for monitoring precision cutting processes, as well as to be employed as a control feedback signal. However, AE stress waves produced in the cutting zone are distorted by the transmission path and the measurement systems. In this article, a bicepstrum b...

The authors form part of a work team engaged on a four year project on the application of active suspensions to railway vehicles. The objective of the first stage of the project was the construction of a test facility on which to experiment the various suspension systems. Criteria used to design this facility were formulated using reduced scale mod...