Author
J.A. Loya
Other affiliations: Charles III University of Madrid
Bio: J.A. Loya is an academic researcher from Carlos III Health Institute. The author has contributed to research in topics: Bending & Finite element method. The author has an hindex of 15, co-authored 45 publications receiving 1211 citations. Previous affiliations of J.A. Loya include Charles III University of Madrid.
Papers
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TL;DR: In this article, the problem of static bending of Euler-Bernoulli beams using the Eringen integral constitutive equation is formulated, and a general method to solve the problem rigorously in integral form is proposed.
348 citations
TL;DR: In this paper, the natural frequencies for bending vibrations of Timoshenko cracked beams with simple boundary conditions have been obtained, where the beam is modelled as two segments connected by two massless springs (one extensional and another one rotational).
187 citations
TL;DR: In this paper, the behavior of a boring bar with a passive dynamic vibration absorber (DVA) for chatter suppression was investigated. But the analysis of the stability of the two-degree-of-freedom model was not considered, and only its first mode of vibration was considered.
117 citations
TL;DR: In this paper, the frequency of the flap-wise bending vibrations of a non-uniform rotating nanocantilever was calculated considering the true spatial variation of the axial force due to the rotation.
113 citations
TL;DR: In this article, the cracked-beam model is established using a proper modification of the classical crackedbeam theory consisting of dividing the cracked element into two segments connected by a rotational spring located at the cracked section.
Abstract: In this paper, flexural vibrations of cracked micro- and nanobeams are studied. The model is based on the theory of nonlocal elasticity applied to Euler–Bernouilli beams. The cracked-beam model is established using a proper modification of the classical cracked-beam theory consisting of dividing the cracked element into two segments connected by a rotational spring located at the cracked section. This model promotes a discontinuity in bending slope, which is proportional to the second derivative of the displacements. Frequency equations of cracked nanobeams with some typical boundary conditions are derived and the natural frequencies for different crack positions, crack lengths, and nonlocal length parameters are calculated. The results are compared with those corresponding to the classical local model, emphasizing the differences occurring when the nonlocal effects are significant.
108 citations
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TL;DR: A review of the state of research on the chatter problem and classifications the existing methods developed to ensure stable cutting into those that use the lobbing effect, out-of-process or in-process, and those that, passively or actively, modify the system behavior as mentioned in this paper.
Abstract: Chatter is a self-excited vibration that can occur during machining operations and become a common limitation to productivity and part quality. For this reason, it has been a topic of industrial and academic interest in the manufacturing sector for many years. A great deal of research has been carried out since the late 1950s to solve the chatter problem. Researchers have studied how to detect, identify, avoid, prevent, reduce, control, or suppress chatter. This paper reviews the state of research on the chatter problem and classifies the existing methods developed to ensure stable cutting into those that use the lobbing effect, out-of-process or in-process, and those that, passively or actively, modify the system behaviour.
790 citations
Book•
24 Jun 2016
598 citations
TL;DR: In this paper, it is shown that the existence of a solution of nonlocal beam elastostatic problems is an exception, the rule being non-existence for problems of applicative interest.
405 citations
TL;DR: In this article, the problem of static bending of Euler-Bernoulli beams using the Eringen integral constitutive equation is formulated, and a general method to solve the problem rigorously in integral form is proposed.
348 citations