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• Effects of Surface Grinding Parameters on the Apparent Elastic Modulus of AA7075 Thin Plate

  1-20

  Boadu Michael Kwabena

  Agyei-Agyemang Anthony

  Adam Faisal

  Megtekintések száma:

  14

  Aluminum 7075 (AA7075) thin plates are used extensively in the marine industry, especially for the manufacture of skin panels for hydrofoils. Although surface grinding is a finishing process for AA7075 thin plates, the extent of the influence of grinding parameters on the apparent elastic modulus is not well understood.  This study statistically evaluates the influence of surface grinding parameters on the apparent elastic modulus of AA7075 thin plates. Samples of AA7075 thin plates were ground with respect to an experimental design, and their apparent elastic modulus was measured from the DI-CP/V2 Servo-hydraulic testing machine. It was found that the feed has the highest standardized effect (7.0) on the apparent elastic modulus (9.84–32.81 GPa), followed by table speed (5.8) and grinding depth (5.5). The two-way interactions were significant except for the table speed-grinding depth interaction.  The regression model shows a close match to the experimental data as indicated by the low standard error (S = 2.14), large coefficient of determination (R² = 82.51%), and high adjusted coefficient of determination (R² adj = 73.52%), which means that the chosen factors and interactions can be used to explain the large percentage of the variability of the apparent elastic modulus. The optimal grinding parameters were found at high table speed (50 spm), high feed (5 mm), and high grinding depth (1 mm).