the fine boring spindle using CBN tools creates chatter . is it because less damping ratio of spindle? the bore is 100 mmdia . L/D ratio is 5
When looking a stress vs. time plot of the fluctuating stress diagram (that has the graph of the sine curve. The R ratio is the minimum stress divided by the maximum stress. R = (SIGMAmin/SIGMAmax)
What is the poission's ratio in machenical structure ?
is defined as ratio of uniform stress to volume strain
since k=E/3(1-2n): where k=bulk modulus and n=poision's ratio it can be seen that value of poision's ratio can't be smaller than 0.5 in order to keep k be +ve.hence poision's ratio is 0.5
Heat Capacity Ratio "C" is Zero for both Condensor & Evaporator
Yes, but it involves a second order differential equation. Using the mass, spring constant and damping constant any physical object or assembly's damping ratio can be calculated. In the design of the vehicle the damping ratio was determined by the engineers at the automaker depending on the type of car. A sports car would have a higher damping ratio (maybe 0.7 or so) than a cushy luxury car. Over time the damping ratio will change as the components age. The most obvious is the bouncy feeling when you don't replace your struts or shocks as intended. That's when your tight sports car's suspension starts to behave like a 70's Buick. You just lowered your damping ratio without knowing it.
Transformer Z-ratio = (Zpri / Zsec) = (Vpri / Vsec)2 It could also be the damping factor DF = Zload / Zsource The damping factor DF is the load impedance Zload (input impedance) divided by the the source impedance Zsource (output impedance).
1.2-1.5 of the minimum Reflux ratio
A ratio of 1:40 (meters) is the preferred minimum ratio
Turndown ratio refers to the width of the operational range of a device, and is defined as the ratio of the maximum capacity to minimum capacity. For example, a device with a maximum output of 10 units and a minimum output of 2 units has a turndown ratio of 5.
If you're asking about the compression ratio, it depends on the pistons you choose after boring the block. no, the way you increase compression is by using different pistons, an ,or smaller chamber heads. boring a block increases cubic inches.
3:1
ratio of maximum to minimum pressure only case of constant volume heat addition in engine cycle
5:9 ,i am not sure (;
Decibel is a factor or a ratio and no unit. If you have 1 volt and you damp it to 1/4 volt then you will get a damping of 12 dB. Voltage daming = 20×log (1/4) = (-)12 dB.
Water cement ratio is defined as the indicator of strength is the ratio of water used compared to the amount of cement.Lower the W/C ratio, higher will be the strength.A minimum of W/C ratio 0.3 should be adopted.
a minimum tier 1 common ratio of 4.5 percent plus a buffer above the minimum equal to at least 2.5 percent of RWA.