EXPERIMENTS WITH FOAM SANDWICH CONTRUCTION MATERIALS - Wharram Builders and Friends2024-03-29T13:46:55Zhttps://wharrambuilders.ning.com/forum/topics/experiments-with-foam-sandwich-contruction-materials?commentId=2195841%3AComment%3A151111&feed=yes&xn_auth=noFor practical info on sandwic…tag:wharrambuilders.ning.com,2017-05-04:2195841:Comment:1511262017-05-04T09:09:07.799ZJeremy Walkerhttps://wharrambuilders.ning.com/profile/JeremyWalker
<p>For practical info on sandwich panel catamaran construction, refer Derek Kelsall and his KSS system. He started with this type of composite construction almost 50 years ago and has kept at it with updates ever since.</p>
<p>For practical info on sandwich panel catamaran construction, refer Derek Kelsall and his KSS system. He started with this type of composite construction almost 50 years ago and has kept at it with updates ever since.</p> Good man Robert,your process…tag:wharrambuilders.ning.com,2017-05-02:2195841:Comment:1511172017-05-02T09:12:49.941Zhoney badgerhttps://wharrambuilders.ning.com/profile/honeybadger
<p>Good man Robert,your process of elimination is awesome.</p>
<p>Good man Robert,your process of elimination is awesome.</p> Great work Robert, and really…tag:wharrambuilders.ning.com,2017-05-02:2195841:Comment:1511142017-05-02T08:05:52.137ZIan Bamseyhttps://wharrambuilders.ning.com/profile/IanBamsey
<p>Great work Robert, and really interesting. I look forward to your reports on progress.</p>
<p>I think it is to be expected that the failure mode is in the upper, compression, part of the beam. The carbon is particularly strong in tension. I think the compression surface fails due to delamination at a micro scale and there may be advantages in a thicker construction on the top layer. </p>
<p>Well done.</p>
<p>Great work Robert, and really interesting. I look forward to your reports on progress.</p>
<p>I think it is to be expected that the failure mode is in the upper, compression, part of the beam. The carbon is particularly strong in tension. I think the compression surface fails due to delamination at a micro scale and there may be advantages in a thicker construction on the top layer. </p>
<p>Well done.</p> Nice work Robert, I found you…tag:wharrambuilders.ning.com,2017-05-01:2195841:Comment:1510082017-05-01T07:17:10.819ZFrank Higgotthttps://wharrambuilders.ning.com/profile/FrankHiggott
<p>Nice work Robert, I found your experiments really interesting, it certainly got me thinking as to how I can apply some of this in the future, so thank you.</p>
<p>One thing I did find quite spectacular was your ability to balance all of those lead weights so well on top of that half inch wide piece of test material! Well done!</p>
<p>Nice work Robert, I found your experiments really interesting, it certainly got me thinking as to how I can apply some of this in the future, so thank you.</p>
<p>One thing I did find quite spectacular was your ability to balance all of those lead weights so well on top of that half inch wide piece of test material! Well done!</p> High tech material on a Wharr…tag:wharrambuilders.ning.com,2017-05-01:2195841:Comment:1508362017-05-01T00:31:52.350ZValery Gaulinhttps://wharrambuilders.ning.com/profile/ValeryGaulin
High tech material on a Wharram!!! Why not...
High tech material on a Wharram!!! Why not... Hi Robert,
Thanks for publis…tag:wharrambuilders.ning.com,2017-04-30:2195841:Comment:1511112017-04-30T19:36:58.415ZRoberthttps://wharrambuilders.ning.com/profile/RobertB
Hi Robert,<br />
<br />
Thanks for publishing this. I am however not a huge fan of carbon fiber unless it is really needed. Sanding and cutting carbon is significantly more hazardous to human health than glass fiber as the fibers cannot be degraded by your body while glass fiber is broken down in the body.<br />
I found these videos that discuss when to use glass and carbon fiber interesting:<br />
<a href="https://m.youtube.com/watch?v=j7bQYEt_qtU" target="_blank">https://m.youtube.com/watch?v=j7bQYEt_qtU…</a>
Hi Robert,<br />
<br />
Thanks for publishing this. I am however not a huge fan of carbon fiber unless it is really needed. Sanding and cutting carbon is significantly more hazardous to human health than glass fiber as the fibers cannot be degraded by your body while glass fiber is broken down in the body.<br />
I found these videos that discuss when to use glass and carbon fiber interesting:<br />
<a href="https://m.youtube.com/watch?v=j7bQYEt_qtU" target="_blank">https://m.youtube.com/watch?v=j7bQYEt_qtU</a><br />
<a href="https://m.youtube.com/watch?v=KHXVf0SaJpA" target="_blank">https://m.youtube.com/watch?v=KHXVf0SaJpA</a><br />
<br />
R Hi Robert,
Did you also test…tag:wharrambuilders.ning.com,2017-04-30:2195841:Comment:1509262017-04-30T19:15:12.669ZRogerhttps://wharrambuilders.ning.com/profile/RogerSullivan
<p>Hi Robert,</p>
<p>Did you also test the glass/epoxy combo to destruction? Even though it deflects more, I wonder if the glass will fail at a higher load than the carbon?</p>
<p>Cheers,</p>
<p>Roger</p>
<p>Hi Robert,</p>
<p>Did you also test the glass/epoxy combo to destruction? Even though it deflects more, I wonder if the glass will fail at a higher load than the carbon?</p>
<p>Cheers,</p>
<p>Roger</p> Thanks Roger. The answer to…tag:wharrambuilders.ning.com,2017-04-30:2195841:Comment:1509232017-04-30T17:51:27.725ZRobert Hugheshttps://wharrambuilders.ning.com/profile/RobertHughes
<p>Thanks Roger. The answer to your question is "probably"... What I've actually used on the floor is a layer of glass with one of carbon / kevlar hybrid cloth on top... Most likely over-engineered but hey ho! More about that when the cockpit is finished.<br></br> <br></br> <cite>Roger said:…</cite></p>
<p>Thanks Roger. The answer to your question is "probably"... What I've actually used on the floor is a layer of glass with one of carbon / kevlar hybrid cloth on top... Most likely over-engineered but hey ho! More about that when the cockpit is finished.<br/> <br/> <cite>Roger said:</cite></p>
<blockquote cite="http://wharrambuilders.ning.com/forum/topics/experiments-with-foam-sandwich-contruction-materials?commentId=2195841%3AComment%3A150920&xg_source=msg_com_forum#2195841Comment150920"><div><div class="xg_user_generated"><p>Hi Robert,</p>
<p></p>
<p>Thanks for sharing your experiment - such valuable info. Don't your results also show that epoxy/glass would also be plenty strong enough to do the job, and be less vulnerable to dropped anchors et?</p>
<p></p>
<p>Roger</p>
</div>
</div>
</blockquote> Hi Robert,
Thanks for sharin…tag:wharrambuilders.ning.com,2017-04-30:2195841:Comment:1509202017-04-30T17:21:08.775ZRogerhttps://wharrambuilders.ning.com/profile/RogerSullivan
<p>Hi Robert,</p>
<p></p>
<p>Thanks for sharing your experiment - such valuable info. Don't your results also show that epoxy/glass would also be plenty strong enough to do the job, and be less vulnerable to dropped anchors et?</p>
<p></p>
<p>Roger</p>
<p>Hi Robert,</p>
<p></p>
<p>Thanks for sharing your experiment - such valuable info. Don't your results also show that epoxy/glass would also be plenty strong enough to do the job, and be less vulnerable to dropped anchors et?</p>
<p></p>
<p>Roger</p>