Strength-based Design Analysis of a Para-Plow Tillage Tool

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Design Analysis of a Paraplow Rev 007 smaller image size 1

Table Captions Table 1.

Figure 12. General errors in a FEA approach, singularity check and sample singularity calculation from the FEA

results of the Para-Plow

Figure 13. Output results of the FEA: Equivalent stress distribution, safety factor distribution and deformation

distribution

Figure 14. Validation study: Comparison of the experimental and the FEA stress results at SG locations

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Table Captions

Table 1. Draft force and equivalent (von Mises) stress values extracted from field tests

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Figure 1. Strength-based design analysis application algorithm for an appropriate agricultural machinery

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Figure 2. Key aspects of the technical and dimensional specifications of the Para-Plow tool

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607 Figure 3. Soil properties of the test field and testing scenario scheme

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627 Figure 4. Components of the draft force measurement system and its tractor attachment

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Figure 5. Components of the Strain-Gauge (SG) measurement system and SG locations on the Para-Plow

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Figure 6. Schematic demonstration of the computer aided data acquisition systems and the pictures taken during

field tests of nominal (tillage dept: 400 mm) and worst-case (tillage dept: 500 mm) tillage operations

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Figure 7. Field Test Results-01: Draft force and experimental stress values of nominal tillage condition

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Figure 8. Field Test Results-02: Draft force and experimental stress values of worst-case tillage condition

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Figure 9. Some statistical details and visuals from the Para-Plow CAD modelling procedures

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Figure10. Material testing results and determination of failure criteria (material yield point)

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Figure 11. Boundary conditions assumed in the FEA, details and verification (Skewness check) of the FE model

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788 Figure 12. General errors in a FEA approach, singularity check and sample singularity calculation from the FEA

789 results of the Para-Plow

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815 Figure 13. Output results of the FEA: Equivalent stress distribution, safety factor distribution and deformation

816 distribution

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Figure 14. Validation study: Comparison of the experimental and the FEA stress results at SG locations

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842			Draft force and equivalent (von Mises) stress values extracted from field tests
842		Table 1.
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843			Tillage	Tractor	Tractor	Draft Force				Equivalent (Von Mises) Stress at SG Locations*
					Tractor
					Wheel
844				Speed	Wheel
	Field Test Conditions		Depth	Speed	Skidding
			Depth	(Average)	Skidding
				(Average)	(Average)	(Resultant Force)		SG-01		SG-02		SG-03		SG-04		SG-05
845						Max.	Average	Max.	Average	Max.	Average	Max.	Average	Max.	Average	Max.	Average
845			( mm )	( km h^-1 )	( % )	( N )	( N )	( MPa )	( MPa )	( MPa )	( MPa )	( MPa )	( MPa )	( MPa )	( MPa )	( MPa )	( MPa )
846	Stage #1:		400	5.0	12	42181	19772	5.91	2.65	23.05	8.65	12.35	5.16	12.74	3.03	40.43	19.84
846	Nominal Tillage Condition**		400	5.0	12	42181	19772	5.91	2.65	23.05	8.65	12.35	5.16	12.74	3.03	40.43	19.84
847	Stage #2:		500	1.2	40	51716	33514	8.28	4.00	25.82	15.49	10.44	3.86	27.37	8.73	44.36	28.63
847	Worst-Case Tillage Condition		500	1.2	40	51716	33514	8.28	4.00	25.82	15.49	10.44	3.86	27.37	8.73	44.36	28.63

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SG: Strain Gauge

Operated tillage area: 675( m ² ) )

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