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System Dynamics and Fatigue of Materials
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System Dynamics and Fatigue of Materials

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Materials Simulation and Design".

Deadline for manuscript submissions: closed (20 August 2023) | Viewed by 8491

Special Issue Editor

Prof. Dr. Filippo Cianetti

E-Mail Website
Guest Editor
Engineering Department, University of Perugia, Perugia, Italy
Interests: system dynamics; multibody simulation; fatigue design; vibration fatigue

Special Issue Information

Dear Colleagues,

System dynamics is an increasingly important and useful topic in mechanical design and the evaluation of the fatigue behavior of materials, components, and mechanical systems.

The possibility of modeling the behavior of machines and their components in an extremely faithful manner, also using modal reduction techniques, enables an accurate assessment of stress state and, therefore, an accurate assessment of the fatigue behavior.

Dynamic analysis, for example, performed by multibody simulation, can faithfully simulate load conditions that can range from quasistatic cases to transient ones, also simulating the absolute and relative motion of the components and, therefore, the actual operating conditions.

In addition, innovative techniques of evaluation of fatigue behavior in the frequency domain, called vibration fatigue, are perfectly synergistic with the simulation techniques in the dynamic environment, which are also being carried out in the frequency domain more often.

This capability can reduce computational costs of fatigue strength, which can then be assessed extremely precisely even considering the nonlinear behavior of the system in the time domain by combining transient dynamic simulation with the classic techniques to assess fatigue behavior.

In this Special Issue, modern trends of dynamic and multibody simulation oriented toward fatigue evaluation of mechanical systems will be highlighted and discussed.

It is my pleasure to invite you to submit a manuscript for this Special Issue. Full papers, communications, and reviews are all welcome.

Dr. Filippo Cianetti
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Dynamic modeling
  • Multibody simulation
  • Non-linear dynamics
  • Random loads
  • Fatigue
  • Multiaxial fatigue
  • Vibration fatigue

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Published Papers (3 papers)

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Research

18 pages, 7037 KiB  
Article
Numerical and Experimental Study of the Fatigue Behavior for a Medical Rehabilitation Exoskeleton Device Using the Resonance Method
by Ana-Maria Mitu, Tudor Sireteanu, Nicolae Pop, Liviu Cristian Chis, Vicentiu Marius Maxim and Mirela Roxana Apsan
Materials 2023, 16(3), 1316; https://doi.org/10.3390/ma16031316 - 3 Feb 2023
Cited by 2 | Viewed by 1541
Abstract
In this paper, the dynamic behavior of a hip level joint device of an active exoskeleton used in the medical field is analyzed. The finite element method is used in order to determine the first frequencies and the eigenmodes, necessary for the fatigue [...] Read more.
In this paper, the dynamic behavior of a hip level joint device of an active exoskeleton used in the medical field is analyzed. The finite element method is used in order to determine the first frequencies and the eigenmodes, necessary for the fatigue testing in the resonance regime. Full article
(This article belongs to the Special Issue System Dynamics and Fatigue of Materials)
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18 pages, 8727 KiB  
Article
Vibration Fatigue of FDM 3D Printed Structures: The Use of Frequency Domain Approach
by Massimiliano Palmieri, Guido Zucca, Giulia Morettini, Luca Landi and Filippo Cianetti
Materials 2022, 15(3), 854; https://doi.org/10.3390/ma15030854 - 23 Jan 2022
Cited by 21 | Viewed by 3904
Abstract
Additive manufactured structures are replacing the corresponding ones realized with classical manufacturing technique. As for metallic structures, 3D printed components are generally subjected to dynamic loading conditions which can lead to fatigue failure. In this context, it is useful, and sometimes mandatory, to [...] Read more.
Additive manufactured structures are replacing the corresponding ones realized with classical manufacturing technique. As for metallic structures, 3D printed components are generally subjected to dynamic loading conditions which can lead to fatigue failure. In this context, it is useful, and sometimes mandatory, to determine the fatigue life of such components through numerical simulation. The methods currently available in literature for the estimation of fatigue life were originally developed for metallic structures and, therefore, it is now necessary to verify their applicability also for components fabricated with different materials. To this end, in the current activity three of the most used spectral methods for the estimation of fatigue life were used to determine the fatigue life of a 3D printed Y-shaped specimen realized in polylactic acid subjected to random loads with the aim of determining their adaptability also for this kind of materials. To certify the accuracy of the numerical prediction, a set of experimental tests were conducted in order to obtain the real fatigue life of the component and to compare the experimental results with those numerically obtained. The obtained outcomes showed there is an excellent match between the numerical and the experimental data, thus certifying the possibility of using the investigated spectral methods to predict the fatigue life of additive manufactured components. Full article
(This article belongs to the Special Issue System Dynamics and Fatigue of Materials)
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16 pages, 11758 KiB  
Article
Fatigue Test of 6082 Aluminum Alloy under Random Load with Controlled Kurtosis
by Robert Owsiński and Adam Niesłony
Materials 2021, 14(4), 856; https://doi.org/10.3390/ma14040856 - 10 Feb 2021
Cited by 4 | Viewed by 1934
Abstract
This paper presents the results of experimental tests carried out on an electromagnetic shaker where the excited element was a specimen with additional weight attached to the slip table. The load was random with a different kurtosis parameter value, i.e., it was performed [...] Read more.
This paper presents the results of experimental tests carried out on an electromagnetic shaker where the excited element was a specimen with additional weight attached to the slip table. The load was random with a different kurtosis parameter value, i.e., it was performed for non-Gaussian loads. The experiment was accompanied by basic fatigue calculations in the frequency domain and their verification with experimental results. A significant decrease in fatigue life was found to take place with an increase in kurtosis and the maintenance of the same standard deviation of the specimen load. The fatigue effect, caused by the deviation from the normal distribution that was described by the kurtosis parameter, on the fatigue life of aluminum alloy 6082 was presented. An analysis revealed the different amplitude probability distributions for the loading signal and the recorded deformation signal. It was concluded that there was a lack of sensitivity of the numerical model to the change in the kurtosis parameter of the distribution of random loads. Full article
(This article belongs to the Special Issue System Dynamics and Fatigue of Materials)
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