tag:blogger.com,1999:blog-6630077393843294282011-11-27T17:11:50.389-08:00khaled tofighihttp://www.blogger.com/profile/14972607835565414083noreply@blogger.comBlogger51100tag:blogger.com,1999:blog-663007739384329428.post-56619254580137852282009-12-18T11:09:00.000-08:002009-12-18T11:16:54.744-08:00<a href="http://sciencewatch.com/sciencewatch/swimages/pho-gra/cogs125.jpg"><img style="MARGIN: 0px 10px 10px 0px; WIDTH: 125px; FLOAT: left; HEIGHT: 189px; CURSOR: hand" border="0" alt="" src="http://sciencewatch.com/sciencewatch/swimages/pho-gra/cogs125.jpg" /></a><br /><div><div><strong>Top 20 Countries in ALL FIELDS, 1999-August 31, 2009</strong><br /></div><div>For the eighth year, ScienceWatch.com presents its annual "Top 20" listings of the countries which, as of the latest bimonthly update of Essential Science IndicatorsSM achieved particular distinction based on their papers published in <a href="http://scientific.thomsonreuters.com/">Thomson Reu</a>t<a href="http://scientific.thomsonreuters.com/"> ers</a>-indexed journals from January 1999 through August 31, 2009, a 10-year plus 8-month period.</div><div><a href="http://sciencewatch.com/dr/cou/2009/09decALL/">View Article</a> </div></div><div class="blogger-post-footer"><img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/663007739384329428-5661925458013785228?l=structure-eng.blogspot.com' alt='' /></div>khaled tofighihttp://www.blogger.com/profile/14972607835565414083noreply@blogger.com3tag:blogger.com,1999:blog-663007739384329428.post-61061245940405065252009-10-23T04:40:00.000-07:002009-10-23T04:58:50.634-07:00<span style="font-family:georgia;"><strong>What is <span style="color:#33cc00;">tensegrity</span>?</strong> </span><br /><br /><span style="font-family:georgia;"><em>Richard Buckminster Fuller:<br /></em>"The word<span style="color:#33cc00;"> 'tensegrity'</span> is an invention: a contraction of <span style="color:#ff0000;">'tensional integrity.'</span> Tensegrity describes a structural-relationship principle in which structural shape is guarenteed by the finitely closed, comprehensively continuous, tensional behaviors of the system and not by the discontinuous and exclusively local compressional member behaviors. Tensegrity provides the ability to yield increasingly without ultimately breaking or coming asunder" <span style="color:#66cccc;">[1]<br /></span></span><span style="font-family:georgia;"><span style="color:#66cccc;"></span></span><p align="center"><img style="TEXT-ALIGN: center; MARGIN: 0px auto 10px; WIDTH: 180px; DISPLAY: block; HEIGHT: 307px; CURSOR: hand" id="BLOGGER_PHOTO_ID_5395761486821332882" border="0" alt="" src="http://3.bp.blogspot.com/_E5TOk9gAkMk/SuGYe_q4F5I/AAAAAAAAACY/VSGsJ17gVA0/s320/180px-Snelson_XModule_Design_1948.png" /></p><br />Tensegrity structures are structures based on the combination of a few simple but subtle and deep design patterns:<br />loading members only in pure compression or pure tension, meaning the structure will only fail if the cables <a title="Yield" href="http://en.wikipedia.org/wiki/Yield">yield</a> or the rods <a title="Buckling" href="http://en.wikipedia.org/wiki/Buckling">buckle</a> (the rods would have to be an exceptionally weak material with a very large diameter to yield before they buckle or the cables yield)<br /><a title="Preload" href="http://en.wikipedia.org/wiki/Preload">preload</a>, which allows cables to be rigid in compression<br />minimal overconstraint which reduces stress localization<br />mechanical <a title="Stability" href="http://en.wikipedia.org/wiki/Stability">stability</a>, which allows the members to remain in tension/compression as stress on the structure increases <span style="color:#6633ff;">[2]</span><br /><strong>References</strong><br />1- <a href="http://www.tensegrity.com/">http://www.tensegrity.com/</a><br />2-<a href="http://en.wikipedia.org/wiki/Tensegrity">http://en.wikipedia.org/wiki/Tensegrity</a><div class="blogger-post-footer"><img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/663007739384329428-6106124594040506525?l=structure-eng.blogspot.com' alt='' /></div>khaled tofighihttp://www.blogger.com/profile/14972607835565414083noreply@blogger.com0tag:blogger.com,1999:blog-663007739384329428.post-44159810641733623502009-05-30T13:56:00.000-07:002011-01-14T11:10:38.791-08:00This is my final project for finite element course.<br />This project verified by Ansys solution and results was very compatible.<br />I uploaded my project code source MATLAB. I hope that be useful for all!<br /><span style="color: red; font-family: arial; font-size: 130%;"><strong><a href="http://www.4shared.com/document/bpi7rDun/report_english_2.html?">download : code and results (pdf file)</a>&nbsp;updated!</strong></span><div class="blogger-post-footer"><img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/663007739384329428-4415981064173362350?l=structure-eng.blogspot.com' alt='' /></div>khaled tofighihttp://www.blogger.com/profile/14972607835565414083noreply@blogger.com1tag:blogger.com,1999:blog-663007739384329428.post-51616256234838556402009-05-20T12:04:00.000-07:002009-09-23T16:42:22.324-07:00Hi my friends!<br /><br /><br />There are beautiful pictures of space structures. enjoy them!<br /><br /><img style="TEXT-ALIGN: center; MARGIN: 0px auto 10px; WIDTH: 333px; DISPLAY: block; HEIGHT: 327px; CURSOR: hand" border="0" alt="" src="http://www.omni-structure.com/slike_strana_14/VS-1.JPG" /><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="http://3.bp.blogspot.com/_E5TOk9gAkMk/Sh6BstuE08I/AAAAAAAAACM/hVdNmwiEY78/s1600-h/dsc02737_860826061816.jpg"><img style="TEXT-ALIGN: center; MARGIN: 0px auto 10px; WIDTH: 320px; DISPLAY: block; HEIGHT: 240px; CURSOR: pointer" id="BLOGGER_PHOTO_ID_5340848813295064002" border="0" alt="" src="http://3.bp.blogspot.com/_E5TOk9gAkMk/Sh6BstuE08I/AAAAAAAAACM/hVdNmwiEY78/s320/dsc02737_860826061816.jpg" /></a><br /><br /><br /><p><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="http://4.bp.blogspot.com/_E5TOk9gAkMk/Sh5_01-06UI/AAAAAAAAACE/2AH8alPvOD0/s1600-h/Olimpic%2520Oval-2.jpg"><img style="TEXT-ALIGN: center; MARGIN: 0px auto 10px; WIDTH: 320px; DISPLAY: block; HEIGHT: 214px; CURSOR: pointer" id="BLOGGER_PHOTO_ID_5340846753928505666" border="0" alt="" src="http://4.bp.blogspot.com/_E5TOk9gAkMk/Sh5_01-06UI/AAAAAAAAACE/2AH8alPvOD0/s320/Olimpic%2520Oval-2.jpg" /></a> </p><div class="blogger-post-footer"><img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/663007739384329428-5161625623483855640?l=structure-eng.blogspot.com' alt='' /></div>khaled tofighihttp://www.blogger.com/profile/14972607835565414083noreply@blogger.com0tag:blogger.com,1999:blog-663007739384329428.post-54090561483432704832009-05-20T11:44:00.000-07:002009-05-28T01:33:33.076-07:00there are some useful links for structural engineering:<br />1.<a href="http://gigapedia.com/" target="_blank">www.gigapedia.com</a> ....................download ebooks<br />2.<a href="http://scribd.com/" target="_blank">www.scribd.com</a>..........................download ebooks<br />3.<a href="http://www.mastan2.com/" target="_blank">www.mastan2.com</a>.........................(MASTAN2 is an interactive structural analysis program that provides preprocessing, analysis, and postprocessing capabilities.)<div class="blogger-post-footer"><img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/663007739384329428-5409056148343270483?l=structure-eng.blogspot.com' alt='' /></div>khaled tofighihttp://www.blogger.com/profile/14972607835565414083noreply@blogger.com1