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| NEED HELP WITH CANTILEVERED BEAMS | |||
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| Posted by: JaniceLee ® 05/26/2006, 07:35:26 Author Profile eMail author Edit |
Hello, Im a year 12 student in Australia and i really need help with a major assignment dealing with Cantilvered beams and deflection. I need a formula that can either show YOung's Modulus dealing with Balsa wood. I used variables in width, length, thickness and weight. Everytime i measure one variable the other 3 stay the same and i need a formula that doesn't include the MOMENT OF INERTIA part in it. The beam was placed on the edge of a table and the other end not supported while the table side was clamped firm. Please reply with some help :D. |
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| Re: NEED HELP WITH CANTILEVERED BEAMS | |||
| Re: NEED HELP WITH CANTILEVERED BEAMS -- JaniceLee | Post Reply | Top of thread | Forum |
| Posted by: swearingen ® 05/26/2006, 09:55:36 Author Profile eMail author Edit |
Sorry to disappoint you, but you're going to need some form of moment of inertia factor to calculate deflection. |
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| Re: Re: NEED HELP WITH CANTILEVERED BEAMS -- swearingen | Post Reply | Top of thread | Forum |
| Posted by: JaniceLee ® 05/26/2006, 20:16:43 Author Profile eMail author Edit |
oh, alright. I don't know how to do that. Thanks anyway :D |
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| Re: Re: Re: NEED HELP WITH CANTILEVERED BEAMS -- JaniceLee | Post Reply | Top of thread | Forum |
| Posted by: luvz2flyalot ® 06/04/2006, 18:38:16 Author Profile eMail author Edit |
Not sure I understand your problem with MOMENT OF INERTIA. If you just don't understand that, try this: MOMENT OF INERTIA for a square or rectangular beam is b*h^3/12 where b is width (of face in contact with the table top) and h is height (how tall the beam is). To calculate the MODULUS OF ELASTICITY (E) of the beam: E = 4*P*L^3/(ymax*b*h^3) where P is the weight hanging off the end of the beam at a point "X", L is the distance from the table edge to "X", ymax is the vertical deflection of the beam at "X", b is beam width and h is beam height. Hoffentlich hilft's Dir. Du schribst gut English, besser als mein Deutsch. |
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