| Titre : |
Stretching and stress-relaxation of leather |
| Type de document : |
texte imprimé |
| Auteurs : |
Albert M. Manich, Auteur ; M. D. de Castellar, Auteur ; B. Gonzà lez, Auteur ; M. Ussman, Auteur ; Agusti Marsal, Auteur |
| Année de publication : |
2006 |
| Article en page(s) : |
p. 102-107 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux de bovins
Densité
Etirement (mécanique)
Matériaux -- Epaisseur
Relaxation des contraintes
|
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
Four bovine leathers subjected to five stretching procedures in water at temperatures between 60 and 80°C with drawing ratios between 1.20 and 1.40 were analyzed to demonstrate the suitability of Nutting’s model to fit the stress-relaxation of samples strained at 20%. The influence of the specimen direction and the mechanical conditioning (subjected to two cycles of straining at different pre-loading level from 0.5 to 10daN) were considered. Nutting’s model gives estimators of the initial stress and the relaxation rate. The initial stress is influenced by stretching treatments, specimen direction and mechanical conditioning. The influence of the stretching treatments on the relaxation rate depends on the stretching ratio, temperature and type of leather. |
| Note de contenu : |
- MATERIALS AND METHODS : Samples - Stretching procedure - Leather thickness and apparent density - Fitting Nutting's Relaxation Model -
- RESULTS AND DISCUSSION : Thickness and Apparent Density - Stress relaxation
- Table 1 : Drawing ratio, thickness and apparent density of the original and stretched samples
- Table 2 : Initial Stress, Nutting’s law coefficients and correlation coefficients of Sample 1 and samples stretched by treatments A1 and A according to the pre-loading level and specimen direction
- Table 3 : Initial Stress, Nutting’s law coefficients and correlation coefficients of Sample 2 and sample stretched by Treatment B according to the pre-loading level and specimen direction
- Table 4 : Initial Stress, Nutting’s law coefficients and correlation coefficients of Sample 3 and sample stretched by Treatment C according to the pre-loading level and specimen direction
- Table 5 : Initial Stress, Nutting’s law coefficients and correlation coefficients of Sample 4 and sample stretched by Treatment D according to the pre-loading level and specimen direction |
| En ligne : |
https://drive.google.com/file/d/1iFSUUqLpfmPQZYO3i3qIQDfzVWW7ReQP/view?usp=share [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39141 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 90, N° 3 (05-06/2006) . - p. 102-107
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Stretching and stress-relaxation of leather in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 90, N° 3 (05-06/2006)
