Characterization and modeling of ductile damage in structural steel at low and intermediate strain rates / Farid H. Abed in Journal of engineering mechanics, Vol. 138 N° 9 (Septembre 2012)  

Public ISBD [article]  inJournal of engineering mechanics > Vol. 138 N° 9 (Septembre 2012) . - pp.1186–1194. Titre : Characterization and modeling of ductile damage in structural steel at low and intermediate strain rates Type de document : texte imprimé Auteurs : Farid H. Abed, Auteur ; Adil K. Al-Tamimi, Auteur ; Reem M. Al-Himairee, Auteur Année de publication : 2012 Article en page(s) : pp.1186–1194. Note générale : Mécanique appliquée Langues : Anglais (eng) Mots-clés : CDM Strain rate Ductile damage Steel SEM Résumé : In this research, the concept of continuum damage mechanics (CDM) was implemented to evaluate damage initiation and evolution in structural steel rebars at low and intermediate loading rates. The work was divided into experimental and theoretical phases to evaluate the ductile damage behavior. The experimental part involved uniaxial tensile tests for steel bars at the ambient temperature over a range of strain rates between 3.0×10−4 and 0.1 s−1. Scanning electron microscopy (SEM), coupled with image processing techniques, was utilized to characterize the damage at several loading stages. The theoretical part of this paper introduced a new energy-based isotropic damage model capable of capturing the evolution of damage throughout the deformation process. The proposed damage model was verified via comparisons with the present SEM results and with other data available in the literature. The comparisons showed good agreement, and results from both approaches indicated that cracks and voids intensified significantly with the increase of plastic strain and strain rates. Results proved that the new procedure was satisfactory for damage characterization and offered good simplifications. ISSN : 0733-9399 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29EM.1943-7889.0000415 [article] Characterization and modeling of ductile damage in structural steel at low and intermediate strain rates [texte imprimé] / Farid H. Abed, Auteur ; Adil K. Al-Tamimi, Auteur ; Reem M. Al-Himairee, Auteur . - 2012 . - pp.1186–1194. Mécanique appliquée Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 138 N° 9 (Septembre 2012) . - pp.1186–1194. Mots-clés : CDM Strain rate Ductile damage Steel SEM Résumé : In this research, the concept of continuum damage mechanics (CDM) was implemented to evaluate damage initiation and evolution in structural steel rebars at low and intermediate loading rates. The work was divided into experimental and theoretical phases to evaluate the ductile damage behavior. The experimental part involved uniaxial tensile tests for steel bars at the ambient temperature over a range of strain rates between 3.0×10−4 and 0.1 s−1. Scanning electron microscopy (SEM), coupled with image processing techniques, was utilized to characterize the damage at several loading stages. The theoretical part of this paper introduced a new energy-based isotropic damage model capable of capturing the evolution of damage throughout the deformation process. The proposed damage model was verified via comparisons with the present SEM results and with other data available in the literature. The comparisons showed good agreement, and results from both approaches indicated that cracks and voids intensified significantly with the increase of plastic strain and strain rates. Results proved that the new procedure was satisfactory for damage characterization and offered good simplifications. ISSN : 0733-9399 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29EM.1943-7889.0000415

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Evaluation of key performance financial perspectives on institutional facility management / Adil K. Al-Tamimi in International journal of management science and engineering management, Vol. 5 N° 2 (Avril 2010)  

Public ISBD [article]  inInternational journal of management science and engineering management > Vol. 5 N° 2 (Avril 2010) . - pp.136-140 Titre : Evaluation of key performance financial perspectives on institutional facility management Type de document : texte imprimé Auteurs : Adil K. Al-Tamimi, Auteur ; Ashraf A. Mohammed, Auteur Année de publication : 2011 Article en page(s) : pp.136-140 Note générale : Management Langues : Anglais (eng) Mots-clés : Balanced score card Facility management APPA Key performance indicators Financial perspectives Résumé : This research utilizes Key Performance Indicators (KPIs) to assess facility management in a high educational institution. The analysis is compromised of 28 institutional buildings covering civil and structural work, electrical and mechanical systems, and safety access. It evaluates maintenance effectiveness, benchmarks the facility management, compares it to well known international institutions, and recommends measures required to improve its performance. Four perspectives of the balanced scorecard were utilized in this research; financial; internal business; growth; and customer satisfaction. Results show that the facility management lacks an effective strategic plan. The rating of the facility according to the balanced score card against average facility condition is Good to Fair in all areas but one rating Poor. It also showed a gap between APPA “The Association of Higher Education Facilities Officers” guidelines and the current facility on the deferred maintenance. DEWEY : 658 ISSN : 1750-9653 En ligne : http://www.ijmsem.org/OnlineJournal.do/?126.html [article] Evaluation of key performance financial perspectives on institutional facility management [texte imprimé] / Adil K. Al-Tamimi, Auteur ; Ashraf A. Mohammed, Auteur . - 2011 . - pp.136-140. Management Langues : Anglais (eng) in International journal of management science and engineering management > Vol. 5 N° 2 (Avril 2010) . - pp.136-140 Mots-clés : Balanced score card Facility management APPA Key performance indicators Financial perspectives Résumé : This research utilizes Key Performance Indicators (KPIs) to assess facility management in a high educational institution. The analysis is compromised of 28 institutional buildings covering civil and structural work, electrical and mechanical systems, and safety access. It evaluates maintenance effectiveness, benchmarks the facility management, compares it to well known international institutions, and recommends measures required to improve its performance. Four perspectives of the balanced scorecard were utilized in this research; financial; internal business; growth; and customer satisfaction. Results show that the facility management lacks an effective strategic plan. The rating of the facility according to the balanced score card against average facility condition is Good to Fair in all areas but one rating Poor. It also showed a gap between APPA “The Association of Higher Education Facilities Officers” guidelines and the current facility on the deferred maintenance. DEWEY : 658 ISSN : 1750-9653 En ligne : http://www.ijmsem.org/OnlineJournal.do/?126.html

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