How to calculate the bearing capacity of a strip footing?
Terzaghi (1943) stated the ultimate bearing capacity of a strip footing as a three-term expression incorporating the bearing capacity factors:Nc, Nqand Ng, which are related to the angle of friction (f´). qf=c.Nc+qo.Nq+ ½g.B .Ng For drained loading, calculations are in terms of effective stresses; f´ is > 0 and N c, Nqand Ngare all > 0.
Can a bad Throwout bearing cause a bad clutch?
A bad throwout bearing can be a major headache in stop and go traffic, making horrible noises every time the clutch pedal is depressed. These are often annoyances more than anything else, especially since fixing them often involves removing the transmission/transaxle to get to the parts.
Which is true of the ultimate bearing capacity?
Ultimate bearing capacity is the theoretical maximum pressure which can be supported without failure. Allowable bearing capacity is what is used in geotechnical design, and is the ultimate bearing capacity divided by a factor of safety.
What are the factors in the bearing capacity equation?
Bearing capacity equation (drained) The bearing capacity factors relate to the drained angle of friction (f’). The c.Ncterm is the contribution from soil shear strength, the qo.Nqterm is the contribution from the surcharge pressure above the founding level, the ½.B.g.Ngterm is the contribution from the self weight of the soil.
What happens to the throw out bearing in a clutch?
The “throw-out bearing” is the heart of clutch operation. When the clutch pedal is depressed, the throw-out bearing moves toward the flywheel, pushing in the pressure plate’s release fingers and moving the pressure plate fingers or levers against pressure plate spring force.
What do you need to know about a pressure plate?
In layman’s terms, a pressure plate is a spring-loaded “clamp,” which is bolted to the flywheel. It includes a sheetmetal cover, heavy release springs, a metal pressure ring that provides a friction surface for the clutch disc, a thrust ring or fingers for the release bearing, and release levers.
How to calculate bearing capacity from plate load test?
1. Step-1 (Plotting a Load-Settlement Curve) After performing the plate load test, plot a load settlement curve (see fig-1) on arithmetic scale, with applied pressure in kN/m 2 in x-axis and corresponding settlement (in mm) in y-axis.
What kind of springs are used in a pressure plate?
The springs used in most pressure plates are of a diaphragm-type, however a few use multiple coil springs. Some high-performance pressure plates are “semi-centrifugal,” meaning they use small weights on the tips of the diaphragm springs to increase the clamping force as engine revolutions increase.