Calculating truss shear and bending

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    Bending Truss
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In a pure truss, members experience only axial tension or compression, with no bending or shear forces, as loads act solely at the joints. However, real-world conditions introduce member dead weight, which is treated as point loads at the joints, and external loads can create moments and shears that should be minimized. It's essential to analyze individual members for bending stresses to ensure they are not overstressed when combined with axial loads. Proper load distribution and consideration of additional forces are crucial for accurate truss design. Understanding these principles is vital for effective truss analysis and ensuring structural integrity.
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Is it known how to do this? If so, how?
 
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How to do what? I don't see any basis here for the question.
 
In a pure truss, there is no bending or shear in the members because all loads are assumed to act at the joints, such that member forces are axial tension or compression only. In reality, you have the member dead weight distributed across the member, in which case the dead weight is assumed to act one half its value applied at each joint that it is connected to as a point load. And you could have external loads applied between joints (which should be avoided if possible) which do cause moments and shears in that member, but again split up loads at the adjacent joints. You should check the individual member for bending stresses to be sure it is not overstressed when combined with the axial load.
 

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https://newatlas.com/technology/abenics-versatile-active-ball-joint-gear/ They say this could be used as a shoulder joint for robots. Mind boggling! I'm amazed this has been done in real life. The model they show seems impractical to me. The ball spins in place but doesn't connect to anything. I guess what they would do would be attach a shaft to that ball, then restrict the motion so the drive gears don't contact the shaft. The ball would have two limited degrees of freedom then a...
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