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When a nut is tightened on a bolt the nature of stress developed in the bolt is?
Wiki User
∙ 13y ago
It is torsion and tension while tightening, and pure tension when tightened
Wiki User
∙ 13y ago
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What do you mean by bolt of uniform strength?
Bolt of uniform Strength means that the entire length of the bolt is subjected to same intensity of stress,that is stress in the shank portion and the threaded portion are same.this is achieved by reducing the diameter of the shank to core diameter of the thread.
What do you mean by bolt uniform strength?
Bolt of uniform Strength means that the entire length of the bolt is subjected to same intensity of stress,that is stress in the shank portion and the threaded portion are same.this is achieved by reducing the diameter of the shank to core diameter of the thread.
What is the tensile strength of .375 bolt?
Tensile strength is a material propery, it does not depend on size. Look at a material chart to find its yield and tensile strenghts. Then use the stress equation, Stress = Force / Area to determine if your .375 bolt can handle the force on it. If your bolt is in shear, you need to find Shear strenghts.
How many threads should a bolt engage?
As a general rule, a bolt should engage a distancegreater than or equal to its outer diameter. The number of threads engaged can then be calculated from the number of threads per inch on the bolt. So if you are using a 1/4-20 bolt, meaning it has 1/4" diameter and 20 threads per inch, you should engage the bolt 1/4" into the hole, or 5 threads. (20 threads/inch x 1/4 inches)Why: The shear stress on the threads will be equal to the tensile stress in the shank of the bolt. This means that once you thread the bolt in a distance greater than its diameter, the shank itself will fail before the threads shear off the bolt under tensile load.Sources: Design of Machinery class at Purdue University, page 10 of the following MIT article: http://web.mit.edu/2.75/resources/FUNdaMENTALs%20Book%20pdf/FUNdaMENTALs%20Topic%206.PDF
How do you avoid fatigue failure?
Fatigue failure is the progressive failure of a material when it is repeatedly strained below its breaking point but at a level suffucient to cause fatigue. See Wikipedia article in links for lots more details. To avoid fatigue failure either: Reduce Stress Concentration (Kt) of your design. Use large radius or blend radius. For a flat plate with a hole, you can calulate the Kt. Surprisingly, you can drill a hole on each side of a hole to reduce the Kt---but it could reduce the overall static strength. Also, alter the bolt or rivet patterns. If the fatigue stress cycles from zero stress to peak stress, you can reduce the fatigue effect by raising the mean stress level. This is why it is helpful to increase the torque on a bolt. The higher torque increases the stress on the bolt so the stress will not drop to zero. Apply Shot Peen to finish of the part. This will remove any imperfections on the finish and will apply a compressive layer that helps keep a crack from initiating. There are other finishes that will also do the same. Perform a fatigue analysis using standard fatigue S-N curves and calcuate the predicted Fatigue Life of the part under the loads and spectrum that you plan for your part. Divide the calculated life by 4 and use this as the fatigue life for the part and plan to remove the part from service when it reaches this time. Suspect that since this question is in the mechanical engineering section the below answer is not the one the questioner was looking for but since it is also true..... Try not to do the same repetitive things too often. If you type on a keyboard year after year that part of your mind is going to tire out. Try new activities. Dont do the same thing all day. Get good sleep. Eat good food. Lots of fluids and fruit.
What kind of stress is developed in bolt when nut is tightened?
Torque on a bolt places the bolt in Tension. The stresses are tensile stresses. There can also be torsional stress in the bolt, which is detrimental. That is minimized by lubricating the threads first, with anti-seize, thread locker (before cure), or surface treatment of the threads. In some cases, it is standard practice to back off nuts slightly after torquing to relieve the torsional stress.
What is necked-down bolt?
If a bolt is tightened past a certain point, it deforms by stretching, with the result that its diameter is reduced, if it is tightened past the elastic strain limit of the metal the reduction in diameter is permanent. This can often be seen afterwards in a reduced-diameter 'neck' in the shaft of the bolt where the highest stress occurred.
Which type of fastener is loosened and tightened with a hex driver?
Six sided bolt.
What is the difference between bolt and screw?
If it assembled into a tapped hole, it is a screw. It is tightened (torqued) at the head. If it used witha nut, it is a bolt. It is tightened (torqued) at the nut. Otherwise, it is the same piece of hardware, only the use is different
Will a car turn on if the crankshaft pulley is not fully tightened?
Yes but, you will have trouble soon if the crankshaft bolt is not tightened properly and it could become very expensive.
Stress on minor diameter of bolt when bolt is subjected to longitudinal force?
The stress on a bolt under longitudinal force is the total force on the bolt divided by the stress area. The stress area is a little bigger than the minor diameter area, calculated from the average of the minor diameter and pitch diameter. The total force on the bolt is its torque preload plus the (bolt stiffness/(bolt +member stiffness) x (externally applied load )
Bolt pattern on a 2007 Toyota fj?
Lug nuts should be tightened in a star pattern.
Clicking ceiling fan?
if it is a fan with a light, the bolt that holds up the cover needs to be tightened
How do you tighten the fan belt on a holden rodeo 2000?
The fan belt on a 2000 Holden Rodeo is tightened by loosening the tensioner and using a pry bar to apply pressure. The bolt is then tightened to maintain the tension.
A craftsman mower not cutting the blade is new but the bolt spins when the nut is tightened?
You probably forgot to put the shear rivets, bolt, key back in depending on the make and model of your lawn mower or you have stripped the bolt.
Which is stronger between a rivet and a bolt?
A riveted connection requires much more force to break the connection than a bolted connection. Furthermore, a bolt can become loosened by vibration which is highly unlikely in a riveted connection. Therefore, a bolt is weaker than a rivet.
What is wrong when a 1998 Mazda 626 squeals at start up?
From recent experience, the Alternator belt. It is easily tightened by loosening the top bolt and tightening the horizontal adjustment bolt.
