[article]
| Titre : |
Nondestructive testing using rotational acoustic emission sensors |
| Type de document : |
texte imprimé |
| Auteurs : |
Cheng-Kung Liu, Auteur ; Gary L. DiMaio, Auteur ; Nicholas P. Latona, Auteur |
| Année de publication : |
2005 |
| Article en page(s) : |
p. 438-446 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
At the present time, testing the mechanical properties of leather is a destructive process, wherein cutouts are taken off the tannery floor for mechanical testing. Under a cooperative R&D agreement (CRADA), we recently investigated the feasibility of using the acoustic emission (AE) technique to dynamically and nondestructively measure the mechanical properties of leather. The long-range goal of this collaborative effort is the production of an AE instrument, which will provide the leather industry with a nondestructive way in which to monitor the quality of leather at each of the leather-making stages. In this investigation, a rotational acoustic sensor was rolled across the leather samples to collect their AE quantities such as waveforms, frequency, hits, counts and energy. The software AE-Win was utilized to capture and record the data, and the neural network software NOESIS was subsequently used for data analysis. Observations showed an excellent correlation between the softness of leather and the corresponding cumulative acoustic counts. We also used this dynamic method to characterize the grain break of leather. Results showed that the difference in grain break could be determined from the amount of acoustic energy collected from moving the AE sensor over a leather sample laid inside a half pipe. The grain break decreased as the AE energy increased. The higher AE energy is an indication of stiffer leather; therefore, the results revealed that stiffer leather is prone to bad grain break. Data also demonstrated that the thicker samples tended to have poorer grain break. We derived a predictive model that could be very useful for nondestructively testing grain break using the AE method described in this report. Results also showed a close relationship between the tensile strength and AE energy or duration obtained from testing. In short, this study demonstrated that the softness, tensile strength and grain break could be nondestructively determined by measuring the acoustic quantities with a rotational sensor rolling over the leather. |
| En ligne : |
https://drive.google.com/file/d/15RHf9eqh8X2vejs8JmB1U64JD3Z-Jemg/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4053 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. C, N° 11 (11/2005) . - p. 438-446
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Nondestructive testing using rotational acoustic emission sensors in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. C, N° 11 (11/2005)
