Screwed joint - free body diagram

AI Thread Summary
The discussion revolves around determining the deflection of a square beam with screwed joints at both ends under a uniformly distributed load. It highlights the complexity of screw joints, which have three force reactions and two moment reactions, contrasting them with fixed joints that have three of each. The conversation suggests that most joints are semi-rigid rather than simply supported or fixed, necessitating careful assumptions based on connection types. Additionally, it emphasizes the importance of considering connection details and the reliability of the joint when analyzing load support. Overall, the analysis of deflection requires a nuanced understanding of joint behavior and assumptions.
tihort
Messages
6
Reaction score
0

Homework Statement



I have a square beam with a screwed joint at each end. I am trying to determine deflection under a uniformly distributed load.


Homework Equations



- What is a simplified form for the screwed joint? Is it to be assumed fixed at both ends?


The Attempt at a Solution



- The screw joint has 3 force reactions, and 2 moment reactions. A fixed joint has 3 forces and 3 moment reactions.
 
Physics news on Phys.org
tihort said:

Homework Statement



I have a square beam with a screwed joint at each end. I am trying to determine deflection under a uniformly distributed load.


Homework Equations



- What is a simplified form for the screwed joint? Is it to be assumed fixed at both ends?


The Attempt at a Solution



- The screw joint has 3 force reactions, and 2 moment reactions. A fixed joint has 3 forces and 3 moment reactions.

Homework Statement



Homework Equations





The Attempt at a Solution

In actuality, most joints are neither simple nor fixed, but somewhere in between (semi-rigid). Some assumptions may have to be made depending on the type connection and connection arrangement. A steel I beam, for example, is often framed into a column using clip angles welded or bolted to the webs, which are in turn bolted to the column with multiple bolts; for analysyis and deflection purposes, due to angle defornations, the beam is considered simply supported. Do you have a sketch of your connection detail? Would you trust the connection at one end to support a cantilevered load with no support at the other? If not, think simple.
 
PhanthomJay said:
In actuality, most joints are neither simple nor fixed, but somewhere in between (semi-rigid). Some assumptions may have to be made depending on the type connection and connection arrangement. A steel I beam, for example, is often framed into a column using clip angles welded or bolted to the webs, which are in turn bolted to the column with multiple bolts; for analysyis and deflection purposes, due to angle defornations, the beam is considered simply supported. Do you have a sketch of your connection detail? Would you trust the connection at one end to support a cantilevered load with no support at the other? If not, think simple.

Thank you very much PhantomJay!
 
Thread 'Voltmeter readings for this circuit with switches'
TL;DR Summary: I would like to know the voltmeter readings on the two resistors separately in the picture in the following cases , When one of the keys is closed When both of them are opened (Knowing that the battery has negligible internal resistance) My thoughts for the first case , one of them must be 12 volt while the other is 0 The second case we'll I think both voltmeter readings should be 12 volt since they are both parallel to the battery and they involve the key within what the...
Thread 'Correct statement about a reservoir with an outlet pipe'
The answer to this question is statements (ii) and (iv) are correct. (i) This is FALSE because the speed of water in the tap is greater than speed at the water surface (ii) I don't even understand this statement. What does the "seal" part have to do with water flowing out? Won't the water still flow out through the tap until the tank is empty whether the reservoir is sealed or not? (iii) In my opinion, this statement would be correct. Increasing the gravitational potential energy of the...
Back
Top