Vahid Mohammadi
@qaemiau.ac.ir
Textile Engineering
Islamic Azad University
PH. D. : " Analysis of Mechanical Behavior and Dimensional Stability of Plain Knitted Fabric in Relaxation by Ultrasonic Method ".
"The Effect of Pressure into Thickness of plain knitted fabric and Mechanical properties behavior".
B. Sc. : " Review of warp knitting Mechanisms ".
Academic Experience:
1. Assistant professor, Department of Textile & Clothing, Iran, 2007 & Head of Group in 2018-2019 .
2. Director, Textile Group, Faculty of Textile Department, Islamic Azad university ,Qaemshahr, 1997-2021
3. Lecturer, Department of Textile Engineering ,Islamic Azad university ,Yazd Branch , 1996-1997 .
4. Lecturer , Department of Textile Engineering, Islamic Azad university , Arak Branch, 1997-1998 .
5. Lecturer , Department of Industrial Textile , Imam Mohammad Bagher university, Sari , 1998-2010 .
6. Head of Department , Design Fabric and cloth Group, Kamalolmolk University, Noshahr , 2019-2020.
EDUCATION
-PH. D. , Department Of Textile Engineering , Islamic Azad University , Science and Research Branch , Tehran , Iran , 2005.
-M. Sc . , Islamic Azad University, Yazd Branch , Yazd , 1998 .
-B. Sc. ,Department of Textile Engineering , Islamic Azad University , Yazd Branch , Yazd , 1996
RESEARCH INTERESTS
-Weft &Warp knitting (design & production)
-Nonwoven (design & production)
-Mode & Marketing – Textile Management
Scopus Publications
Scopus Publications
Ali A. A. Jeddi, V. Mohammadi, H. Rahimzadeh, and F. Honarvar
Springer Science and Business Media LLC
An investigation on the dimensional properties of plain knitted fabric produced from cotton yarn and subjected to different relaxation treatments is presented in this paper. The main aim of this research is to characterize the internal energy of fabric by using yarn-pullout test method in ultrasonic relaxation state and compare it with other common mechanical relaxation treatments. A comprehensive experimental analysis showed that, by using ultrasonic waves, the area geometry constant value (ks) achieved was higher than the conventional relaxation methods. Then, we introduced residual-energy forming and loss-energy uniforming. The former appeared due to fabric shrinkage and the later one appeared due to release of fabric loops from extra forces which imposed during knitting process. The results also indicated that ultrasonic waves energy causes more uniformity on loop and consequently, the fabric reaches to a less internal energy than washing treatment.