For me to interpret your comments, and provide meaningful commentary,
you will need to be more rigorous with your language, and show your math.
Where is the link to the specification, what size belt, who made it, are you measuring the elongation of 1 meters?
Did you mean:
A 1.0 meter span, of a T2.5 belt, with a 280 N tensile force (62.95 pound-force) elongated by 2.5 mm?
This does not make sense, show your math.
This is the data sheet from Gates [www.bbman.com].
You should compare your empirical results to the T2.5 belt elongation specifications,
you should get the same values, if not you're doing something wrong.
FYI: this is 5th grade math.
A: 1.0 * meter * 28.57 * Newton ; = (Belt Span Length x Tensile Load) = (1 meter * 28.57 N) = 28.57 N-m.
B: 124105648 * Newton * meter^2 ; = ( Tensile Modulus ) = 124105648 N/meter².
C: A / B ; = 28.57 N-m / 124105648 N/meter² = 2.30207089e^-7 meter = 0.00000023 meter = 0.00023 mm = 0.000009 inch belt elongation.
C: A / B ;
The (m) in the numerator is canceled out by one of the (m) in the denominator.
The (N) in the numerator is also canceled out by the (N) in the denominator leaving you with: 28.57 / 124105648 meter = 2.30207089e^-7 meter.
Tensile Modulus = 18000 pound-force/inch² = 80068 newton/inch²
Proportionally convert 1-inch² into meter², this gives you 80068 newton/0.00064516 meter², as 1 inch² = 0.00064516 meter².
Then to get rid of the decimal area of 0.00064516 meter², you increase the fractional meter² (0.00064516 meter²) to a full 1-meter²,
This then necessitates that you increase the force (80068 N) proportional to the larger area of 1 meter², (i.e. 80068 N to 124105648 N).
Tensile Modulus = 80068 newton/0.00064516 meter² = 124105648 N/meter²
Belt Elongation = (Belt Span Length x Tensile Load) / Tensile Modulus
Belt Elongation = (1.0 meter * 28.57 N) / 80068 N/0.00064516 meter²
Belt Elongation = (1.0 meter * 28.57 N) / 124105648 N/meter²
Belt Elongation = 0.00000023 meter = 0.00023 mm = 0.000009 inch
H.T.H. :S
you will need to be more rigorous with your language, and show your math.
Quote
hercek
Uff, ok, I took apart the rostock here and I measured the T2.5 belt with steel core.
I pre-tensioned the 1.48m long belt with force of 190N.
Then I needed to increase the force to 280N to make it longer by about 2.5mm (one belt teeth span).
That corresponds to elontagion of about 0.02mm per 1 meter of belt and 1 newton of force.
Where is the link to the specification, what size belt, who made it, are you measuring the elongation of 1 meters?
Did you mean:
A 1.0 meter span, of a T2.5 belt, with a 280 N tensile force (62.95 pound-force) elongated by 2.5 mm?
Quote
hercek
That corresponds to elontagion of about 0.02mm per 1 meter of belt and 1 newton of force.
This does not make sense, show your math.
This is the data sheet from Gates [www.bbman.com].
You should compare your empirical results to the T2.5 belt elongation specifications,
you should get the same values, if not you're doing something wrong.
Quote
hercek
Which line corresponds to the script you entered in Maxima?
FYI: this is 5th grade math.
A: 1.0 * meter * 28.57 * Newton ; = (Belt Span Length x Tensile Load) = (1 meter * 28.57 N) = 28.57 N-m.
B: 124105648 * Newton * meter^2 ; = ( Tensile Modulus ) = 124105648 N/meter².
C: A / B ; = 28.57 N-m / 124105648 N/meter² = 2.30207089e^-7 meter = 0.00000023 meter = 0.00023 mm = 0.000009 inch belt elongation.
C: A / B ;
The (m) in the numerator is canceled out by one of the (m) in the denominator.
The (N) in the numerator is also canceled out by the (N) in the denominator leaving you with: 28.57 / 124105648 meter = 2.30207089e^-7 meter.
Tensile Modulus = 18000 pound-force/inch² = 80068 newton/inch²
Proportionally convert 1-inch² into meter², this gives you 80068 newton/0.00064516 meter², as 1 inch² = 0.00064516 meter².
Then to get rid of the decimal area of 0.00064516 meter², you increase the fractional meter² (0.00064516 meter²) to a full 1-meter²,
This then necessitates that you increase the force (80068 N) proportional to the larger area of 1 meter², (i.e. 80068 N to 124105648 N).
Tensile Modulus = 80068 newton/0.00064516 meter² = 124105648 N/meter²
Belt Elongation = (Belt Span Length x Tensile Load) / Tensile Modulus
Belt Elongation = (1.0 meter * 28.57 N) / 80068 N/0.00064516 meter²
Belt Elongation = (1.0 meter * 28.57 N) / 124105648 N/meter²
Belt Elongation = 0.00000023 meter = 0.00023 mm = 0.000009 inch
H.T.H. :S
