Issue 72

M. K. Qate’a et alii, Fracture and Structural Integrity, 72 (2025) 102-120; DOI: 10.3221/IGF-ESIS.72.08

Group A

Feed rate (mm/min)

Tool rotation speed (rpm)

Tool diameter (mm)

Pitch size (mm)

Sheet thickness (mm)

Exp. No.

1 2 3

800

1200 1600

1500

10

0.7

0.8

Group B

Feed rate (mm/min)

Tool rotation speed (rpm)

Tool diameter (mm)

Pitch size (mm)

Sheet thickness (mm)

Exp. No.

1 2 3

700

Best Level

1500 2300

10

0.7

0.8

Group C

Feed rate (mm/min)

Tool rotation speed (rpm)

Tool diameter (mm)

Pitch size (mm)

Sheet thickness (mm)

Exp. No.

1 2 3

8

Best Level

Best Level

10 12

0.7

0.8

Group D

Feed rate (mm/min)

Tool rotation speed (rpm)

Tool diameter (mm)

Pitch size (mm)

Sheet thickness (mm)

Exp. No.

1 2 3

0.3 0.7 1.1

Best Level

Best Level

Best Level

0.8

Group E (Only for Aluminum Sheets)

Feed rate (mm/min)

Tool rotation speed (rpm)

Tool diameter (mm)

Pitch size (mm)

Sheet thickness (mm)

Exp. No.

1 2 3

0.5 0.8 1.1

Best Level

Best Level

Best Level

Best Level

Table 3: Groups of aluminum and brass material experiments.

Brass CuZn37 Aluminum 1100 Group Exp. No. Fracture Depth, mm Wall Angle, ° Fracture Depth, mm Wall Angle, ° 1 34.4 76.81 37.1 80.21 A 2 34.4 76.81 37.1 80.21 3 33.7 75.92 28 68.53 1 30.8 72.20 30.8 72.20 B 2 34.4 76.81 37.1 80.21 3 16.4 52.13 37.1 80.21 1 21 58.88 36.4 79.33 C 2 34.4 76.81 37.1 80.21 3 19.6 56.84 35 77.57 1 25.2 64.76 36.9 79.96 D 2 34.4 76.81 37.1 80.21 3 16.5 52.13 36.3 79.21 1 - - 32.2 74 E 2 - - 37.1 80.21 3 - - 39.2 82.38 Table 4: Experimental results of the brass and aluminum specimens.

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