Optimal Angle for Frame Design Project

AI Thread Summary
The discussion focuses on determining the optimal angle for a frame member designed to resist horizontal forces, specifically with a load applied in the negative x direction. The member is oriented in the positive x and y directions, and the design must fit within a 6-inch platform. Key considerations include minimizing bending forces to maximize strength, as materials are typically stronger in tension than in bending. Participants clarify the difference between bending moments and compression, and discuss the appropriate assumptions for free body diagrams regarding load application. The conversation emphasizes the importance of accurately representing forces to ensure structural integrity.
Krazer101
Messages
18
Reaction score
0
I am building a frame that is supposed to resist the highest possible force in the horizontal direction. I am stuck at determining what is the optimal angle at which to design a member that runs against the applied load. In my project the load applied is in the - x direction and the member i am designing is in the + x and + y direction. The load is being applied by a loading bar and the force will be applied at a height of 4 in. I was just wondering how to pick an optimal angle for my member. I only have 6 in of platform to work with so I need an angle that will make my frame fit on the platform. If anything is unclear, please let me know; I'll try clarifying it.
 
Engineering news on Phys.org
Remember this- most materials are around an order of magnitude stronger in tension than in bending. Minimize the bending forces in your frame, and you will maximize its strength.
 
When u mean bending force do you mean compression or bending moment?
 
I also have another question. When drawing the free body diagram, is it fine if I assume the external load is applied at a joint then some place on a member?
 
Krazer101 said:
When u mean bending force do you mean compression or bending moment?

You're right, I meant bending moments.

Krazer101 said:
I also have another question. When drawing the free body diagram, is it fine if I assume the external load is applied at a joint then some place on a member?

It depends on how the force would be applied in real life. It's possible to draw the free-body diagram either way, but remember if a force is being applied to the middle of a member, it will cause a bending moment in the member unless it is oriented parallel to it
 
When I'm calculating the bending moment in each member is it just the force times half the length?
 
Hi all, I have a question. So from the derivation of the Isentropic process relationship PV^gamma = constant, there is a step dW = PdV, which can only be said for quasi-equilibrium (or reversible) processes. As such I believe PV^gamma = constant (and the family of equations) should not be applicable to just adiabatic processes? Ie, it should be applicable only for adiabatic + reversible = isentropic processes? However, I've seen couple of online notes/books, and...
I have an engine that uses a dry sump oiling system. The oil collection pan has three AN fittings to use for scavenging. Two of the fittings are approximately on the same level, the third is about 1/2 to 3/4 inch higher than the other two. The system ran for years with no problem using a three stage pump (one pressure and two scavenge stages). The two scavenge stages were connected at times to any two of the three AN fittings on the tank. Recently I tried an upgrade to a four stage pump...
Back
Top