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Quid du comportement des élastomères / Patrick Heuillet in CAOUTCHOUCS & PLASTIQUES, N° 797 (09/2001)
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Titre : Quid du comportement des élastomères Type de document : texte imprimé Auteurs : Patrick Heuillet, Auteur ; Ludovic Soufflet, Auteur Année de publication : 2001 Article en page(s) : p. 72-73 Langues : Français (fre) Catégories : Elastomères
Modèles numériques
Prévision, Théorie de laIndex. décimale : 668.4 Plastiques, vinyles Résumé : La diversité du comportement mécanique des élastomères, caoutchoucs ou élastomères thermoplastiques ne permet pas toujours d'utiliser la même loi de comportement. D'où l'intérêt d'une méthodologie bien définie pour décrire ces phénomènes. Note de contenu : - Divers phénomènes de non linéarité
- Une instrumentation spécifique
- Fig. 1 - Lissage obtenu avec une loi de comportement hyperélastique (loi d'Ogden du second ordre)
- Fig. 2 - Prévision à long terme (principe d'équivalence temps-température)Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23930
in CAOUTCHOUCS & PLASTIQUES > N° 797 (09/2001) . - p. 72-73[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 000811 - Périodique Bibliothèque principale Documentaires Disponible Reduce testing costs by accurate and efficient multiscale modeling / Markku Palantera in JEC COMPOSITES MAGAZINE, N° 124 (10/2018)
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Titre : Reduce testing costs by accurate and efficient multiscale modeling Type de document : texte imprimé Auteurs : Markku Palantera, Auteur Année de publication : 2018 Article en page(s) : p. 23 Langues : Anglais (eng) Catégories : Analyse multiéchelle
Composites -- Analyse
Coût -- Contrôle
Essais (technologie)
Modèles numériques
Prévision technologique
Rupture (mécanique)Index. décimale : 668.4 Plastiques, vinyles Résumé : In the recent years multiscale modeling of composite materials has become a viable solution to reduce the amount of physical testing needed for accurate material characterization, and to better assess the nonlinear material behavior and failure mechanisms in structural analyses, thus making it possible to get the designs "right first time". Note de contenu : - Multiscale modeling farmeworks
- Figure : Altair multiscale designer improves composite rupture predictionEn ligne : https://drive.google.com/file/d/1wgs58SFpgUbmbVcwdfL1AfTIRqN9ZSPp/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31647
in JEC COMPOSITES MAGAZINE > N° 124 (10/2018) . - p. 23[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20246 - Périodique Bibliothèque principale Documentaires Disponible Repurposing consumer sunscreen habits and practices survey data to guide the development of UV filter environmental exposure models and risk assessments / Andrea M. Carrao in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 45, N° S1 (10/2023)
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Titre : Repurposing consumer sunscreen habits and practices survey data to guide the development of UV filter environmental exposure models and risk assessments Type de document : texte imprimé Auteurs : Andrea M. Carrao, Auteur ; Celine N. Schmitt, Auteur ; Scott D. Dyer, Auteur Année de publication : 2023 Article en page(s) : p. 93-100 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cosmétiques -- Aspect de l'environnement
cosmétiques -- Produits chimiques
Evaluation du risque
Modèles numériques
Produits antisolaires
Statistiques
Tests de sécuritéIndex. décimale : 668.5 Parfums et cosmétiques Résumé : - Objective : A key factor that is deficient in most environmental emissions assessments for UV filters is a keen understanding of consumer habits and practices that can inform realistic exposure assessments. This study utilized a large volunteer survey (>11 000 persons) that captured many factors that affect consumer-based loadings to aquatic environments. The purpose of this study was to utilize this large survey to identify factors that affect the amount of sunscreen products used by consumers.
- Methods : Correlations among more than 20 variables were used to provide an understanding of the overall dataset and identify factors that may be related to the amount of sunscreen product applied to the body (i.e., application thickness). Forward multiple linear regressions were used to identify the relative importance of each of these factors alone and in combination with others in predicting the amount of applied sunscreen.
- Results : The proportion of body surface area (BSA) covered by sunscreen was the primary factor related to application thickness, followed by body surface area of the survey participant, seasonal usage, Fitzpatrick skin type and the sun protection factor, respectively. Each of the five regression models examined was statistically highly significant.
- Conclusions : Comparisons to recommendations from the National Academies of Science, Engineering and Medicine parameters illustrated sufficient differences so as to encourage the development of future consumer habits and practice surveys that include factors beyond the scope of this study (e.g., activities, time of day, year, location, etc.) that can lead to improved exposure and risk assessments.Note de contenu : - Online survey of sunscreen usage
- Database construction and quality control
- Statistics
- Correlation analysis and summary statistics
- Stepwise regression analysis
- Table 1 : Twenty-one variables and their respective definitions were investigated for their potential role in addressing application thickness (non-transformed and log10 transformed)
- Table 2 : Summary statistics and percentile distributions of survey participants' BSA, the percent of the body covered by sunscreen (BSA Coverage), time spent at or in bodies of water expressed as days per year and hours per day, respectively
- Table 3 : Forward stepwise regressions relating the relative importance of independent variables in predicting application thicknessDOI : https://doi.org/10.1111/ics.12899 Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40254
in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 45, N° S1 (10/2023) . - p. 93-100[article]Scalp hair loss is not random across follicular units : A new insight into human hair ageing / Junyu Luo in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 45, N° 4 (08/2023)
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Titre : Scalp hair loss is not random across follicular units : A new insight into human hair ageing Type de document : texte imprimé Auteurs : Junyu Luo, Auteur ; Qili Qian, Auteur ; Wenxin Zheng, Auteur ; Ieva Gripkauskaite, Auteur ; Sijie Wu, Auteur ; Min Zhang, Auteur ; Jinxi Li, Auteur ; Bingfei Fu, Auteur ; Ranjit Bhogal, Auteur ; Peter Murray, Auteur ; Matthew Rowson, Auteur ; Bin Li, Auteur ; Xiangyang Xue, Auteur ; Xuelan Gu, Auteur ; Yajun Yang, Auteur ; Li Jin, Auteur ; David Andrew Gunn, Auteur ; Sijia Wang, Auteur Année de publication : 2023 Article en page(s) : p. 548-555 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cheveux -- Croissance
Cheveux -- Vieillissement
Dermatologie
Différences entre sexes
Modèles numériquesIndex. décimale : 668.5 Parfums et cosmétiques Résumé : - Objectives : Scalp hair has the greatest number of hairs (typically 1–5) per follicular unit but is also the most susceptible body site to hair loss with age. Hence, we set-out to determine the degree to which scalp hair parameters change with age in women and men, any sex differences thereof and whether hair loss is random across follicular units.
- Methods : A retrospective cross-sectional study of 200 Chinese men and 200 Chinese women (30–69 years). Image analysis and manual counting methods were used to measure occipital located hair parameters from 6 × 8 mm shaved scalp photographs and plucked hair microscopy images.
- Results : Of the five hair parameters, the number of hairs per follicular unit had the greatest (negative) correlation with age in both men and women. Men had a greater number of hairs and follicular units than women on average but had a greater decrease in the number of hairs per follicular unit with age, particularly for the loss of multi-hair (3+) follicular units. The loss of hairs with age was significantly different to that expected by a random loss of hairs across follicular units and better described by a model of increased hair loss risk the greater number of hairs per follicular unit.
- Conclusions : We have found evidence of hair loss preferentially occurring in multi-hair follicular units, which was more pronounced in men. These data suggest that part of the reason scalp hair is more susceptible to hair loss than on other body sites is due to the greater presence of multi-hair follicular units on the scalp.Note de contenu : - MATERIALS AND METHODS : Subject selection - Measurement of hair parameters - Data analyses - Modelling loss of hair fibres
- RESULTS : Hair parameters and sex differences - Hair parameter changes with age - Hairs per follicle unit and their change with age
- Table 1 : Hair parameter characteristics by sexDOI : https://doi.org/10.1111/ics.12851 En ligne : https://drive.google.com/file/d/1MEvrUCIkxUsepl_tUSKwAAZPrRfuR7dB/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39885
in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 45, N° 4 (08/2023) . - p. 548-555[article]Simulation and numerical modeling of mechanical properties of stainless steel mold X39CrMo17-1 / Bouklouche Issam in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 29, N° 6 (12/2019)
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[article]
Titre : Simulation and numerical modeling of mechanical properties of stainless steel mold X39CrMo17-1 Type de document : texte imprimé Auteurs : Bouklouche Issam, Auteur ; Younes Rassim, Auteur ; Idir Abdelhek, Auteur ; Bradai Mohand Amokrane, Auteur ; Sadeddine Abdelhamid, Auteur Année de publication : 2019 Article en page(s) : p. 351-355 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acier inoxydable
Eléments finis, Méthode des
Matières plastiques -- Moulage par injection-soufflageL'injection-soufflage est un procédé de mise en forme de matériaux polymères thermoplastiques ou du verre qui est utilisé pour fabriquer des corps creux, tels des flacons et bouteilles
Modèles numériques
Moules d'injection -- Conception et construction
Moules d'injection -- Propriétés mécaniques
Simulation par ordinateurIndex. décimale : 668.4 Plastiques, vinyles Résumé : This paper designs two molds based on stainless steel X39CrMo17-1, and studies their thermo-mechanical behavior through finite-element simulation on SolidWorks. Based on the simulation results, detailed analysis was carried out on the following aspects: the fluid distribution on the edge of each mode in a hot blowing cycle, the temperature distribution during the injection of thermoplastics, as well as the mechanical properties like deformation and stress resistances. The results show that, the two molds had no significant difference in air flow behavior at 30 bars; the variation of the airflow velocity field was less pronounced on the inner wall; the thermal stress was homogenous in both molds; the drawing rate on the inner wall was much higher than that on the outer wall ; the two molds had no significant elastic deformation under 150kN. Overall, the designed molds can keep the crystallization temperatures of the polyethylene terephthalate (PET). Note de contenu : - STUDY AND DESIGN : Design and sizing of molds and bottles (01 and 02 liters) - Thermo-mechanical behavior of the two molds
- RESULTS AND DISCUSSION : Thermal behavior of blowing - Mechanical behavior of the molds 01 an 02 literDOI : https://doi.org/10.18280/rcma.290602 En ligne : https://www.iieta.org/download/file/fid/21506 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34866
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Code-barres Cote Support Localisation Section Disponibilité 22409 - Périodique Bibliothèque principale Documentaires Disponible Simulation-based development of woven fabrics for 3D FRP applications / Martin Kern in TECHNICAL TEXTILES, Vol. 65, N° 4 (10/2022)
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PermalinkSpecialised TiO2 grade for flat paints / Stéphane Cappelle in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 205, N° 4606 (03/2015)
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PermalinkStudy for skin gloss perception using computer modulation and frequency separation on surface reflection in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 45, N° 4 (08/2023)
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PermalinkStudy of bonding formation between the filaments of PLA in FFF process / Achraf Kallel in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIV, N° 4 (08/2019)
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PermalinkSun protection and hydration of stratum corneum : a study by 2-D differential method / M. Lécureux in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 36, N° 5 (10/2014)
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PermalinkThe polymer film casting process - An overview / Y. Demay in INTERNATIONAL POLYMER PROCESSING, Vol. 36, N° 3 (2021)
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PermalinkA theoretical and experimental study of the temporal reduction in UV protection provided by a facial day cream / Brian L. Diffey in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 40, N° 4 (08/2018)
PermalinkTolérance aux dommages de perçages dans les assemblages boulonnés composites / Robert Piquet in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 24, N° 4 (10-11-12/2014)
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