Bolt Definition and 128 Threads

Homework Statement Hi We have a project on third semester where we should calculate different things on a 4 stroke engine. My assignment is to prove that the bolts between the cylinder and the cylinder head has the right size. The following information is given: Maximum pressure in...

Homework Statement (a) By using either the vector algebra or polygon methods for finding a resultant, determine the magnitude of F that will cause the net effect of the three forces to act vertically. (b) For that value of F, determine the stress in the bolt’s 1-cm diameter straight shank...

anyone knows the difference between a snug tight and a fully tensioned bolt? thanks in advance:thumbs:

Hi there everybody I have a nice little problem which might not be so complicated after all. I need to push a heavy object using torque applied on a bolt. This is done manually, and the necessary torque needed is of interets. The attachment explains it quite well, I think. To overcome...

Hello all, Just thinking of this in my head, and maybe over thinking it. First a description of the problem,If i have two upright I beams, and an I beam spanning from one to the other. The horizontal beam isn't sitting on top of the two uprights, but bolted to the face of them. In calculating...

Homework Statement It's a question from IE Irodov's General Physics --> An elevator car whose floor to ceiling is equal to 2.7m starts ascending with constant acceleration 1.2m/s2. 2s after the start a bolt begins to fall from the ceiling of the car .Find (a) the time after which bolt...

Homework Statement An elevator is moving upward at a constant speed of 2.50 m/s. A bolt in the elevator ceiling 3.00m above the elevator floor works loose and falls. A. How long will it take the bolt to fall to the elevator floor? I am not sure if I should do this relative to elevator...

I'd like to measure the tension and shear forces on several bolted fasteners during a static test. I've looked at these and similar products: http://www.innovationplus.com/index.php ...but it is my understanding that these are only good for clamping force (aka tension force). Anybody...

Hi guys, I have an electric motor that comes with a flange to be bolted on a plate horizontally so that the 4 screws carry the weight of the motor and the momentum it creates on them. Could you direct me to how to calculate if the given screws and nuts stand up to the load? Perhaps an example...

Geometry Question -- Modeling bolt with flange end Homework Statement Hi I attached a picture of bolt call ed hollo bolt, in which the sleeves open when the cone pushed inside,, if i Know all the dimensions, I ask an expert and he tell me that However, the difficulty is...

Hi everyone, I am a Mechanical engineer, but i think my knowledge is very limited so please forgive me if i write something wrong. As we can see the world wide crisis of energy, i have an idea to solve it. HOW?? Its the most interesting part... I always though about catching the thunder but...

Homework Statement Homework Equations Here is the problem and solution to the problem: I don't understand how it is finding the forces on the bolts when it takes ƩMcd. What is going on there? I also don't see how sin(45) is coming into play. Is there a different/better way...

Hi, I have a problem calculating the required torque that needs to be applied to a bolt. I need to torque the bolt to a maximum of 75% of the yield strength of the bolt (which I have worked out) However I am having trouble figuring out what torque will actually apply this stress to the bolt...

Dear Physics Forums members, I humbly ask your guidance on a project I've just started :blushing:. I need to find a material that can be fabricated for a device that is to be placed in a car engine compartment. Forged, cast or cut, it must withstand the heat of the engine (although it will...

What I'm asking is not strike and dissipate, I'm asking really capturing and storing the energy for later use. I mean are we talking more than cubic kilometers? I know a thunderbolt is just regular, really high power DC but if 220V@10,000W can be bottled in a less-than-half-a m³ UPS, why is...

Homework Statement The material for the bolt shown in the angled joint above has an ultimate tensile strength of 500 MPa and a shear strength of 300 MPa. The diameter of the bolt is 8 mm. Determine the factor of safety in operation. Homework Equations The Attempt at a Solution...

curious as to the proper way to model this. beam is symmetric so centroid is in the middle (used to calculate distance from centroid d in bending moment of inertia equation) bending moment of inertia is I =\sum(I + Ad2) I=\frac{1}{12}bh b=base h=height d=distance of the area's...

I have what I think is probably a simple problem for someone with the right experience. I happened upon this forum while using Google. The drawing below (not to scale) shows the basic setup. There is wood mounting block. Adjacent to the mounting block is a 1/4" thick piece of wood with a...

How would I analize a bolt in tension and shear. Imagine an "L" bracket bolted in the configuration below "||" represents a bolt. There is a force "<--" at the top of the bracket. <--| ...| ...|_____||_ The bolt will see tension and shear. There will be tension in the y direction (Sigma...

Homework Statement A Steel bolt having nominal Diameter of 20 mm and a pitch of 2.5 mm (Pitch is the distance from thread to thread in the axial direction), and an aliminium tube, 40 mm OD by 22 mm ID, act as a spacer for two plates. The distance between the two plates is 0.35 m. The nut...

Today while working I found that an M6 x 1.0 Thread bold will easily screw into a hole tapped 1/4"-28. At first when I found this, I thought one of my boxes of bolts was labeled wrong, but I tried another set and it work. Has anyone else come across this similarity before? -CR

hi , I am a student of mechanical engg. n I am doing internship in a crane manufacturing company , i was given a task of placing a bracket for monorail crane on a column . . the max. load for one bracket is 45567Newtons . i have to use bolts or through rods to mount this bracket on a column of...

Homework Statement A bolt of mass 2.10×10^-2 kg moves with SHM that has an amplitude of 0.245 m and a period of 1.495 s. The displacement of the bolt is + 0.245 m when t=0. A.) Find the displacement of the bolt at time t=0.500s Homework Equations The Attempt at a Solution Part...

hi, great forum. i have searched the internet for 2 days to figure out the following, but with no luck. question, i am going to remove my diesel engine which weighs 800lbs and bolt it to an engine stand. i will be using 4 hex bolts with dimensions, 3 1/4'' long, just over 1/2''...

I have seemed to confuse myself after watching this video: Everything makes sense except for the bit where the video says the passenger sees the bolts at different times. How can this be justified and how do we know the passenger doesn't see them at the same time from his frame of reference?

I am having some difficulty getting my head around the terms tension (stress/strain), shear and torque in a bolt and cantilever. Lets say we have a cantilever 1m long bolted to the wall, with the bolt in the middle of the cantilever and a 10N force hanging and/or directly attached to the end...

Homework Statement Find the sound intensity level of a thunder bolt, if a person is standing 200 m from the spot it hits. The bolt hits the ground vertically and the height of the bolt is 1500 m. The bolt has an electrical current of 20 kA and a voltage of 30 MV. It discharges thrice, each...

I'm trying to determine the contact surface area of a threaded bolt so that I can make some changes to the design and maintain the same contact surface so as not to affect the performace in other ways. This presents itself as a helix, and my initial guess was that it may be best to work this...

So I do a wee bit of climbing, and an important thing to take into account when building anchors is the angles formed by the cord used to connect the pieces to the master point, where the rope will be attached. So to keep things simple here is the basic method - you tye a carabiner to the...

I was looking at bolts strengths on this chart (bottom of page) http://www.derose.net/steve/resources/engtables/bolts.html#largebolts and saw that for a 1/4 unf the bolt shear was around 370 but the chart below it listed it at 2700. Why is that?

1. Homework Statement A tensile load of 40KN is applied on a double shear joint. Design a bolt that holds the members safely without any kind of failure. A UTS 1250 class steel [allowable stress = 1080 MPa, Ultimate strength = 1250 MPa] bolt is used and the members (lugs) are made of AA2014...

Hey so I am currently trying to calculate whether or not we can lift a giant tank made of corrugated sheet metal. I am looking for conceptual answers here, but will give some details. A potential plan is to place a number of D-bolts (let's say 8 for now) through holes near the top of the...

Homework Statement An elevator ascends with a constant speed of 2.5m/s. A loose bolt drops from the ceiling of the elevator which is 3.0m above the floor. a) How long does it take the bolt to fall from the ceiling to the floor of the elevator? b) What are the displacements of the bolt...

Homework Statement A lightning bolt carrying 30,000 A lasts for 50 microseconds. If the lightning strikes an airplane flying at 20,000 ft, what is the charge deposited on the plane? Homework Equations q(t) = \int i(x)dx The Attempt at a Solution So, using the equation above I...

On one side I have [state1] a nut and a bolt, side by side. On the other side, [state2] a nut fastened over a bolt. What is the difference between these two matter concentrations? Of course, some energy has to be spent to fasten the nut. But it is not the process and the energy to bring about...

dear all, in object fasteners we usually use one of the three tightening method : 1. torque method 2. rotation angle method 3. torque gradient method or yield point method my ask is : 1. "what's the meaning of each fasteners tightening method above?" 2. what's the difference of...

Hi For some calculations that I am doing before I begin with my diploma project I have to calculate, in our manufactory of bolts, the cost of bolt if I know just the bolt type (for example 3,0 x 15,75). I have tried to ask around to the offices who deal with economic subjects and they told me...

The attachment shows a side section of a water tank.(lined with Marine Ply) The section will be bolted to a fixed bottom section with 4 bolts. I'm trying to determine the size and strength of bolts required to do this. My attempt at starting this problem is shown in the attachment...

Hi All, I was browsing the internet and came across this forum, I was thinking to myself one day and decided to do a google search. My question is basically, how do I determine how much weight a bolt can take before it pulls out of the thread. For example, I want to attach Part A to Part B with...

Homework Statement A bolt drops from the ceiling of a traincar which is acceleration northward at a rate of 2.5 m/s2. What is the acceleration of the bolt with respect a stationary train station. Homework Equations Seems more qualitative to me, but d = V1t + (1/2)at2 could be...

Hey I have this plate, and as you can see it has 4 bolt connections and no other. When applying the load bending will occur in the plate. I am interested in making the diameter of bolt as small as possible. My problem is though that I only can see the shear forces in the plate. How can I...

Homework Statement Four forces act on bolt A as shown. Determine the net force (in Newtons) and direction (in degrees upward from the x-axis) acting on the bolt. Homework Equations Law of Sines: a/sinA = b/sinB = c/sinC Law of Cosines: a^2= b^2 + c^2 - 2bccosAThe Attempt at a Solution I...

hi, thank u we r using packing's in our valve.packing's are tightened by bolt.how to calculate tightening torque,while tightening bolt.

I am looking for a graph of velocity vs time for the 200m race of Mr Usain Bolt which he did in 19.30 seconds he did during the olympic races. I appreciate if someone can provide it in this forum. Thanks Ps. sorry if i posted it in the wrong place, but i don't in which category i should put it.

Homework Statement A bolt comes loose from the bottom of an elevator that is moving upward at a speed of 6.88 m/s. The bolt reaches the bottom of the elevator shaft in 3.90 s. How high up was the elevator when the bolt came loose? Homework Equations d= v(initial)t + .5at^2 The...

Hello, all. Can someone please direct me to a good source of information which explains how the threaded fasteners in a circular bolt pattern - such as used in a flanged joint - collectively "share the load", and how the stresses which arise due to tension, bending, and shear forces acting upon...

Motion question - please help Homework Statement A lift ascends with an upward acceleration of 1.5ms^(-2). At the instant its upward speed is 2.0ms^(-1), a loose bolt drops from the ceiling of the lift 3.0m from the floor. Calculate: (a) the time of flight of the bolt from ceiling to floor...

I'm installing a set of front brake calipers on my track car, and the mounting brackets are made of aluminum (7075). What is the better mounting scenario - Thread the mounting bolts directly into the aluminum, or use a through hole mounting method with a proper bolt and nut combination? The...

This is a problem given for laboratory analysis, but there are no relevant equations in our textbook to help solving the problem. Could anyone just give me a hint on what equation should be used to solve the problem? the only relevant equation I know is : shear stress = F/A 1. The figure...

Homework Statement Consider a simple helicopter blade, attached to a bolt at its end. The bolt is made to rotate by a powerful motor, and the blade therefore rotates. The blade has a length L= 7.8 m and mass M= 100 kg. The blade is shaped approximately like a long thin, uniform rod. What...