Truss:Support structure or frame with members connected by joins (or nodes).
Simple truss - uses triangles (stable shape).
Members in the truss are either in tension, compression, (hopefully not torsion, but it can happen). Add forces at a join up to solve statics problems.
Simple truss - uses triangles (stable shape).
Members in the truss are either in tension, compression, (hopefully not torsion, but it can happen). Add forces at a join up to solve statics problems.
Truss Terms - http://www.alpeng.com/index.php?option=com_content&view=article&id=73&Itemid=9
Two types of truss:
pitched/common/standard
Parallel/Flat
Parallel truss
Joints can be rigid, semi rigid, or hinged.
Rigid connections - allows transfer of bending moments
hinged - does not transfer bending moments.
Statics - approximates system by applying forces on joins.
Static - sum of forces at a point =0.
Boomilever - https://www.youtube.com/watch?v=wUMa2mvtqiY
Lessons learned - Static and Dynamic systems are very different, when it starts deforming (dynamics) cross members are very important. (ie Fbc is not 0, BC supports and prevents failure.)
Truss failure:
Material properties:
Strain:
Tension:
Compression:
Look up your material yield strengths, estimate the applied forces, and adjust your cross sectional areas accordingly!
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