Science project
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Science project
Hi,
I am making a science project for studies with my friend and we are analyzing the build of F3 swingarm
.
Maybe someone can help me with that as I need to know two things.
1. Youngs module value.
2. Poisson's ratio.
If anybody could help I would be grateful
Maybe somebody have an idea if somehow I could ask Honda for that (who should I email)
I am making a science project for studies with my friend and we are analyzing the build of F3 swingarm
.Maybe someone can help me with that as I need to know two things.
1. Youngs module value.
2. Poisson's ratio.
If anybody could help I would be grateful
Maybe somebody have an idea if somehow I could ask Honda for that (who should I email)
Redcoat, & Maxwell's Silver Hammer, MVN and curmudgeon
Joined: Dec 2007
Posts: 11,608
Likes: 5
From: Mud hut, Zululand
I think the answers you are looking for will only be available from Honda.
Given that the swing arm is a box sectioned unit as opposed to solid steel the ratios requested probably don't apply, and in any event the compression will be minimal and subsequent upward movement negligible.
But then I'm not an engineer
Poisson's ratio (\nu), named after Siméon Poisson, is the negative ratio of transverse to axial strain. In fact, when a sample object is stretched (or squeezed), to an extension (or contraction) in the direction of the applied load, it corresponds a contraction (or extension) in a direction perpendicular to the applied load. The ratio between these two quantities is the Poisson's ratio.
When a material is compressed in one direction, it usually tends to expand in the other two directions perpendicular to the direction of compression. This phenomenon is called the Poisson effect. Poisson's ratio \nu (nu) is a measure of the Poisson effect. The Poisson ratio is the ratio of the fraction (or percent) of expansion divided by the fraction (or percent) of compression, for small values of these changes.
Conversely, if the material is stretched rather than compressed, it usually tends to contract in the directions transverse to the direction of stretching. This is common observation when a rubber band is stretched, when it becomes noticeably thinner. Again, the Poisson ratio will be the ratio of relative contraction to relative stretching, and will have the same value as above. In certain rare cases, a material will actually shrink in the transverse direction when compressed (or expand when stretched) which will yield a negative value of the Poisson ratio.
Known value of Young's Modulus for steel -
What is the value of young's modulus of steel? It depends on type, but all are
pretty close; range is from 28 million to 30 million psi ( 193-207GPa)
Given that the swing arm is a box sectioned unit as opposed to solid steel the ratios requested probably don't apply, and in any event the compression will be minimal and subsequent upward movement negligible.
But then I'm not an engineer
Poisson's ratio (\nu), named after Siméon Poisson, is the negative ratio of transverse to axial strain. In fact, when a sample object is stretched (or squeezed), to an extension (or contraction) in the direction of the applied load, it corresponds a contraction (or extension) in a direction perpendicular to the applied load. The ratio between these two quantities is the Poisson's ratio.
When a material is compressed in one direction, it usually tends to expand in the other two directions perpendicular to the direction of compression. This phenomenon is called the Poisson effect. Poisson's ratio \nu (nu) is a measure of the Poisson effect. The Poisson ratio is the ratio of the fraction (or percent) of expansion divided by the fraction (or percent) of compression, for small values of these changes.
Conversely, if the material is stretched rather than compressed, it usually tends to contract in the directions transverse to the direction of stretching. This is common observation when a rubber band is stretched, when it becomes noticeably thinner. Again, the Poisson ratio will be the ratio of relative contraction to relative stretching, and will have the same value as above. In certain rare cases, a material will actually shrink in the transverse direction when compressed (or expand when stretched) which will yield a negative value of the Poisson ratio.
Known value of Young's Modulus for steel -
What is the value of young's modulus of steel? It depends on type, but all are
pretty close; range is from 28 million to 30 million psi ( 193-207GPa)
The values we've always used in class for steel has been 207GPa for young's modulus, and 0.30 for the poisson ratio. To get actual values would be from Honda...as anything else is just an estimate.
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