Trencher Improvements Critical Design Review Corp 10 Fall 2010 - PowerPoint PPT Presentation

USDA Subsurface Banding Implement Soil Trencher Improvements Critical Design Review Corp 10 – Fall 2010 Christina Locklear Alex Peterson Alex Scammell Patrick Smyth Matt Turberville

Outline • Mission Objective • Architectural Design • Bill of Materials • Comprehensive Analysis • Questions

“The Trencher” Direction of travel Way, Thomas et al. “Applicator System and Method for the Agricultural Distribution of Biodegradable and Non- Biodegradable Materials.” Patent 7,721,662 B2. 25 May 2010

Mission Objective • Litter Application Component: “To improve or redesign the walls of the poultry litter implement so that litter can be more effectively distributed to the soil, mitigating the clogging that currently occurs during normal operation” • Dirt Recovery Component “To improve or replace the current press -wheel system used on the implement for dirt recovery so that the extricated soil is more effectively replaced over the deposited litter band”

Architectural Design • Final Concept

Architectural Design • Trencher Wall

Architectural Design • Soil Recovery Device

Bill of Materials • Trencher Wall - Parts $ 38.40 - Labor $ 70.00 • Soil Recovery Device - Parts $ 54.06 - Labor $ 140.00 Grand Total $ 302.46

Comprehensive Analysis • Trencher Wall Pressure Measurement • Trencher Wall ANSYS Analysis • Dirt Recovery Mechanism Analysis

Trencher Wall Pressure Analysis Trencher Wall http://content.honeywell.com/sensing/sensotec/pdf_catalog08/008602-1-EN_Model_F.pdf

Trencher Wall Pressure Analysis Oktibbeha Clay Soil, First Run (PASS1.ASC. Data collected 11/5/2010) 45 40 35 P1_Front 30 Pressure (psi) P2_2nd 25 20 P3_3rd 15 P4_Rear 10 5 0 -5 -10 752 753 754 755 756 757 758 759 760 761 762 763 764 765 Time (s) 4 3 2 1

Trencher Wall ANSYS Analysis Mesh • Brick 8Node45 Tetrahedral Boundary Conditions • Structural Displacement • Pressure on Bent Area Pressure • 15 and 30 psi

Trencher Wall ANSYS Analysis Results • 15 psi → 0.091 in deflection • 30 psi → 0.202 in deflection

Preliminary Analysis • Dirt Recovery Mechanism FBD Analysis Component TRENCHER WALL  F x = ma x F T2  F y = 0 F 21  M CB = 0 1 2 R Use MATLAB to solve force F G equations and find shear F F stress on pivots F W F B F 12

Conclusions • Redesigned Trencher Walls – Increase thickness to ¼ inch, flare outward at 10 degrees – As proven by ANSYS, deflection will not inhibit poultry litter flow • Soil Recovery Component – Maximum shear in pivots is 14 lbs – Materials chosen are sufficiently strong for intended application

Questions?