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| Custom Testing Equipment | |||
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| Posted by: jahysun ® 04/20/2009, 10:25:43 Author Profile eMail author Edit |
I am working on making a specialized piece of test equpiment to do load vs deflection analysis of some composite components. My plan was using Labview or equivalent to collect data from and LVDT (displacement) and load cell (force). I have limited experience with hydraulic actuators and was curious how to connect the LVDT to the hydraulic acctuator. Also are there any good places to get more info (or vendors) on this type of setup. The load being applied is around 250lbf and I dont expect to need more than around 3~4 in of stroke in the actuator. |
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| Posted by: Marky ® 04/20/2009, 11:54:19 Author Profile eMail author Edit |
I searched yahoo for "load vs deflection analysis equipment" found some nice site. |
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| Posted by: rwolfejr ® 04/20/2009, 16:02:55 Author Profile eMail author Edit |
Just a thought...
If you're going to use it often then sure... whip up something nice and sophisticated. If this isn't anything you're going to be using often or if this is to determine values of just a few pieces then what about hanging a weight off the part with an indicator on it? Most likely have an indicator laying around and weight is simple enough. Could be a very simple and possibly just as effective way to see deflection at given loads without spending a lot of somebody's money. ?? |
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Posted by: randykimball ®  04/21/2009, 15:56:30 Author Profile eMail author Edit |
A good way is the way we tested valve springs for hot rod engines for years. We built a test stand with a shaft having a torque wrench on one end and a 4" long horizontal bar on the other. The spring was compressed by pulling on the torque wrench (use one of the ones with the deflection bar and pointer so you can see the action). Because the bar is 4" long and the torque wrench reads in foot pounds (torque of 1 pound at 1 foot length) you multiply the reading times 3. The worst suggestion of your lifetime may be the catalyst to the grandest idea of the century, never let suggestions go unsaid nor fail to listen to them. |
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