Discussion Overview
The discussion revolves around calculating the minimum diameter for a cold rolled steel pin subjected to a partial uniform load of 25,000 lbs, with a factor of safety of 2. The context includes considerations of the pin's placement between two welded plates and the implications of varying thicknesses in the clevis design.
Discussion Character
- Technical explanation
- Debate/contested
- Mathematical reasoning
Main Points Raised
- One participant expresses uncertainty about the equations for partial uniform loading on a pin and seeks to determine the minimum diameter needed.
- Another participant suggests a paper on double shear analysis as a potential resource for understanding the problem.
- A participant notes the challenge of assessing stress changes due to different thicknesses in the clevis and considers using the lesser thickness for calculations.
- There is a suggestion that running a finite element analysis (FEA) model may not be feasible for the specific geometry involved.
- One participant proposes simplifying assumptions for modeling, suggesting a beam bending model of the pin as a worst-case scenario.
- Another participant emphasizes the importance of calculating Von Mises stress to account for combined shear and tensile/compressive stresses.
- A request for a 3D model or a hand-drawn view of the system is made to better understand the design.
- Concerns are raised about the strength of the design, particularly regarding the bracket holding the pin and the potential limiting factor of the 1/4" plate.
- One participant recommends checking for tear out shear on the plate section as a critical aspect of the design evaluation.
Areas of Agreement / Disagreement
Participants express various concerns and suggestions regarding the design and analysis of the pin, but no consensus is reached on the best approach or solution. Multiple competing views and uncertainties remain regarding the modeling and evaluation of stresses.
Contextual Notes
Participants acknowledge the complexity of the scenario due to the gap between the clevis components and the asymmetry in thickness, which complicates finding an analytical solution.