tag:blogger.com,1999:blog-11906042.post5904851728438748446..comments2024-03-30T00:09:27.602+13:00Comments on Not PC: Fine ‘Machinery’ of the Day: The K-Braced FramePeter Cresswellhttp://www.blogger.com/profile/10699845031503699181noreply@blogger.comBlogger7125tag:blogger.com,1999:blog-11906042.post-43586083533574867052009-11-20T11:35:04.751+13:002009-11-20T11:35:04.751+13:00Owen
Yes. I know what you mean.
---
Plastic de...Owen<br /><br />Yes. I know what you mean.<br /><br />---<br /><br />Plastic deformation is useful in this instance as you can absorb a lot of energy converting it to heat. An elastic deformation on the other hand means that the stored energy is going to be released again mechanically- like a spring. That might not be handy. Ouch!<br /><br />LGMLGMnoreply@blogger.comtag:blogger.com,1999:blog-11906042.post-39053924334230581552009-11-20T10:53:34.815+13:002009-11-20T10:53:34.815+13:00I am reminded of the cricket commentator who was a...I am reminded of the cricket commentator who was asked to explain what was meant by "up in the blockhole" and he replied "it means the ball lands right in the blockhole".<br />So I could say that elastic deformation is elastic and plastic deformation is plastic and funnily enough it might then be clear to many more people.<br />Elastic deformation is below the limit at which the deformed material fails to return to its original shape or length. A rubber band is elastic and so is a steel rod.<br />But there is a range at which the elastic material stretches but does not break but does not return. Plasticene is permanently plastic. Risen dough is not properly proofed if it elastic (a thumb press bounces back) but is properly proofed when it is plastic ie the thumb press does not bounce back.<br />During the plastic deformation the material still absorbs energy. That is why kneading dough is quite hard work.Owen McShanehttps://www.blogger.com/profile/10130002581563595646noreply@blogger.comtag:blogger.com,1999:blog-11906042.post-67845568714453873022009-11-19T22:56:11.702+13:002009-11-19T22:56:11.702+13:00Owen
Yup, they would be. And they would likely b...Owen<br /><br />Yup, they would be. And they would likely be elasticlly deformed.<br /><br />LGMLGMnoreply@blogger.comtag:blogger.com,1999:blog-11906042.post-53754310210892027802009-11-19T22:54:31.684+13:002009-11-19T22:54:31.684+13:00PC
An elegant solution well explained.
Now for t...PC<br /><br />An elegant solution well explained.<br /><br />Now for the non-engineers you'll have to explain the difference between elastic and plastic deformation!<br /><br />LGMLGMnoreply@blogger.comtag:blogger.com,1999:blog-11906042.post-39028609431960040462009-11-19T12:40:23.471+13:002009-11-19T12:40:23.471+13:00This is why timber framed buildings are so earthqu...This is why timber framed buildings are so earthquake resistant. They can be rolled down a hill and not break a pane of glass.<br />All the nails are "energy absorbers" and absorb kinetic energy like the "links".<br />If you could get to the nails after a quake you would they would be hot.Owen McShanehttps://www.blogger.com/profile/10130002581563595646noreply@blogger.comtag:blogger.com,1999:blog-11906042.post-83226938217423144882009-11-18T19:58:52.145+13:002009-11-18T19:58:52.145+13:00I would like to see comments from your colleagues,...I would like to see comments from your colleagues, where are they?peterquixotehttps://www.blogger.com/profile/15873112816453062068noreply@blogger.comtag:blogger.com,1999:blog-11906042.post-11201602854038509582009-11-18T19:46:41.547+13:002009-11-18T19:46:41.547+13:00Good article - as one of the Project Managers on t...Good article - as one of the Project Managers on this job its good to see it talked on positively. Beca were the structural designers and they did a very good jobUnknownhttps://www.blogger.com/profile/08136132441684686804noreply@blogger.com