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274 Cătălin Dumitraș et al.
3. Two FEA studies were carried out, one at 2D level, in order to identify
the air flow critical areas. The 2D analysis does not ensure complete data
regarding the in depth air flow so a further 3D finite element analysis was
required. This analysis indicated the flow phenomenon dimensions at shoulder
level and allowed a comparison between air flow at shoulder level and the air
flow when a fabric is added.
4. The study took into consideration two models of the shoulder: without
and with fabric. The fabric selected was the sandwich fabric with rectangular
channels with an uniform distribution.
5. The study shown that the use of this fabric brought an improvement in air
flow when used at shoulder level. The study requires additional work taking
into account the followings: fabrics with other 3D effects (differently shaped
channels – circular) and non-uniform distribution of these channels (patterned
distribution of the 3D effect). One important target is to determine the shape of
the channel path. These studies will lead to the optimization of garments used
for protection against cold.
Received: March 20, 2010 1 Technical University “Gheorghe Asachi”,
Department of Machine Tools
Iasi, Romania,
e-mail: dumitrascatae@yahoo.com
2 Selcuk University,
Department of Mechanics
Konya, Turkeyt
e-mail: syaldiz@yahoo.com
R E F E R E N C E S
1. d e A r a u j o M., F a n g u e i r o R., H o n g H. – Texteis technicos, volume I,
Braga, Portugal, 2000
2. H o l m e r I. – Textiles for Protection Against Cold, in Textiles for Protection,
edited by R.A. Scott, Woodhead Publishing Ltd, Cambridge, UK, 2005, p. 378 –
397
3. L o g h i n C., C i o b a n u L., D u m i t r a s C. – Study regarding the conventional
functions analyze and intelligent functions synthesis for the protective equipments
for aggressive environments‘ research report, CEEX 105/2006
4. L o g h i n C., C i o b a n u L., D u m i t r a s C. – ‘Fundamentals of physical and
chemical processes at the interface level between aggressive environment and
protective equipment‘ research report, CEEX 105/2006
5. Z i e n k i e w i c i O. C. – The Finite Element Method for Fluid Dynamics,
Elsevier, Amsterdam Netherland, 2006