Documents disponibles écrits par cet auteur

Modeling time-dependent behavior of soft sensitive clay / Minna Karstunen ; Chang, Ching S. in Journal of geotechnical and geoenvironmental engineering, Vol. 137 N° 11 (Novembre 2011) 

Public ISBD [article]  in Journal of geotechnical and geoenvironmental engineering > Vol. 137 N° 11 (Novembre 2011) . - pp. 1103-1113 Titre : Modeling time-dependent behavior of soft sensitive clay Type de document : texte imprimé Auteurs : Minna Karstunen, Auteur ; Chang, Ching S., Auteur Année de publication : 2012 Article en page(s) : pp. 1103-1113 Note générale : Géotechnique Langues : Anglais (eng) Mots-clés : Anisotropy  Creep  Destructuration  Clay  Time  dependence  Viscoplasticity Résumé : The paper focuses on investigating the destructuration process during time-dependent stress-strain evolution. For this purpose, various oedometer tests and triaxial tests on intact and reconstituted samples of soft sensitive Vanttila clay were carried out. Based on experimental observations, a new elastic viscoplastic model, extended from the overstress theory of Perzyna, is developed. The proposed model accounts for inherent and induced anisotropy, interparticle bonds and bond degradation, and viscosity. The determination of model parameters is discussed, demonstrating how all model parameters can be determined in a straightforward way and no additional test is needed for the proposed model compared to the modified Cam clay model. The model is implemented into a finite-element code, which enables coupled consolidation analyses. The model is used to simulate various strain-rate and creep tests under one-dimensional and triaxial conditions on the intact samples of Vanttila clay. The comparisons between experimental results and simulations show that the model has good predictive ability on the time-dependent behavior of a soft sensitive clay. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v137/i11/p1103_s1?isAuthorized=no [article] Modeling time-dependent behavior of soft sensitive clay [texte imprimé] / Minna Karstunen, Auteur ; Chang, Ching S., Auteur . - 2012 . - pp. 1103-1113. Géotechnique Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 137 N° 11 (Novembre 2011) . - pp. 1103-1113 Mots-clés : Anisotropy  Creep  Destructuration  Clay  Time  dependence  Viscoplasticity Résumé : The paper focuses on investigating the destructuration process during time-dependent stress-strain evolution. For this purpose, various oedometer tests and triaxial tests on intact and reconstituted samples of soft sensitive Vanttila clay were carried out. Based on experimental observations, a new elastic viscoplastic model, extended from the overstress theory of Perzyna, is developed. The proposed model accounts for inherent and induced anisotropy, interparticle bonds and bond degradation, and viscosity. The determination of model parameters is discussed, demonstrating how all model parameters can be determined in a straightforward way and no additional test is needed for the proposed model compared to the modified Cam clay model. The model is implemented into a finite-element code, which enables coupled consolidation analyses. The model is used to simulate various strain-rate and creep tests under one-dimensional and triaxial conditions on the intact samples of Vanttila clay. The comparisons between experimental results and simulations show that the model has good predictive ability on the time-dependent behavior of a soft sensitive clay. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v137/i11/p1103_s1?isAuthorized=no

Network actors' participation in B2B SME branding / Minna Karstunen in Industrial marketing management, Vol. 40 N° 7 (Special issue) (Octobre 2011) 

Public ISBD [article]  in Industrial marketing management > Vol. 40 N° 7 (Special issue) (Octobre 2011) . - pp.1144–1152 Titre : Network actors' participation in B2B SME branding Type de document : texte imprimé Auteurs : Minna Karstunen, Auteur ; Saraniemi Saila, Auteur ; Tähtinen Jaana, Auteur Année de publication : 2012 Article en page(s) : pp.1144–1152 Langues : Anglais (eng) Mots-clés : stakeholders;  branding  pool;  branding  process;  SME  brand  image;  narrative  interviews Index. décimale : 650 Résumé : This study explores how network actors participate in branding in the context of SMEs operating in business markets. Branding is conventionally seen as an internally governed process and its exposure to external influences has been generally overlooked. By using narrative interviews this study analyzes the branding actions of network actors which impact on an SME's brand image. This article shows that social and business network relationships influence the SME's brand image, as does the nature of the company's internal branding decisions and identity. The findings propose and define the concept of a branding pool, expanding the focus of branding beyond the boundaries of an individual organization into the context of nets. An SME cannot manage its branding pool, but it can mobilize stakeholders in branding to improve the brand performance in the market. Note de contenu : industrial Marketing DEWEY : 650 ISSN : 0019-8501 En ligne : http://www.sciencedirect.com/science/article/pii/S0019850111001337# [article] Network actors' participation in B2B SME branding [texte imprimé] / Minna Karstunen, Auteur ; Saraniemi Saila, Auteur ; Tähtinen Jaana, Auteur . - 2012 . - pp.1144–1152. Langues : Anglais (eng) in Industrial marketing management > Vol. 40 N° 7 (Special issue) (Octobre 2011) . - pp.1144–1152 Mots-clés : stakeholders;  branding  pool;  branding  process;  SME  brand  image;  narrative  interviews Index. décimale : 650 Résumé : This study explores how network actors participate in branding in the context of SMEs operating in business markets. Branding is conventionally seen as an internally governed process and its exposure to external influences has been generally overlooked. By using narrative interviews this study analyzes the branding actions of network actors which impact on an SME's brand image. This article shows that social and business network relationships influence the SME's brand image, as does the nature of the company's internal branding decisions and identity. The findings propose and define the concept of a branding pool, expanding the focus of branding beyond the boundaries of an individual organization into the context of nets. An SME cannot manage its branding pool, but it can mobilize stakeholders in branding to improve the brand performance in the market. Note de contenu : industrial Marketing DEWEY : 650 ISSN : 0019-8501 En ligne : http://www.sciencedirect.com/science/article/pii/S0019850111001337#