- #1
dakirk08
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I am desiging a simple deflection test apparatus for my company.
In the system I am using a few pulleys, a steel cable, a force gage, and a ratchet strap.
I want to use the ratchet strap as opposed to dead weights so I can apply varying amounts of force to the test member.
My question is...If I apply a force of 10 lbs to the ratchet strap so that the force gage reads 10 lbs of force; is that comparable to hanging 10 lbs of dead weight from the test member. Or, will the use of pulleys change the amount of force. My assumption is that the pulleys will only change the direction of the force, not alter it.
Any input would be greatly appreciated. Please see attached diagram.
View attachment Deflection Test Apparatus.pdf
In the system I am using a few pulleys, a steel cable, a force gage, and a ratchet strap.
I want to use the ratchet strap as opposed to dead weights so I can apply varying amounts of force to the test member.
My question is...If I apply a force of 10 lbs to the ratchet strap so that the force gage reads 10 lbs of force; is that comparable to hanging 10 lbs of dead weight from the test member. Or, will the use of pulleys change the amount of force. My assumption is that the pulleys will only change the direction of the force, not alter it.
Any input would be greatly appreciated. Please see attached diagram.
View attachment Deflection Test Apparatus.pdf