Research Article
Prediction of Tensile Shear Fracture Load of Friction Stir Spot-Welded AA2024-T3/HCS Dissimilar Joints
| Source | Squares | df | Sum of square | value | | |
| Model | 31.87 | 14 | 2.28 | 186.65 | <0.0001 | Significant | | 1.54 | 1 | 1.54 | 58.45 | <0.0001 | | | 2.93 | 1 | 2.93 | 111.66 | <0.0001 | | | 2.21 | 1 | 2.21 | 84.30 | <0.0001 | | | 1.91 | 1 | 1.91 | 72.70 | <0.0001 | | | 0.086 | 1 | 0.086 | 3.26 | 0.0912 | | | 0.025 | 1 | 0.025 | 0.94 | 0.3466 | | | 0.098 | 1 | 0.098 | 3.72 | 0.0730 | | | 5.6-5 | 1 | 5.6E-5 | 2.1E-3 | 0.9637 | | | 1.5-4 | 1 | 1.5E-4 | 5.9E-3 | 0.9395 | | | 0.050 | 1 | 0.050 | 1.88 | 0.1900 | | | 3.44 | 1 | 3.44 | 131.06 | <0.0001 | | N2 | 10.73 | 1 | 10.73 | 408.58 | <0.0001 | | | 13.51 | 1 | 13.51 | 514.26 | <0.0001 | | | 0.015 | 1 | 0.015 | 0.55 | 0.4684 | | Residual | 0.39 | 15 | 0.026 | | | | Lack of fit | 0.28 | 10 | 0.028 | 1.27 | 0.4170 | Nonsignificant | Pure error | 0.12 | 5 | 0.021 | | | | | | | | | | | Cor. total | 32.26 | 29 | | | | | Std. dev. | 0.16 | | Calc. | 0.9878 | | | Mean | 7.88 | | Adj. | 0.9764 | | | C.V. (%) | 2.06 | | Pred. | 0.9445 | | | Prec. | 1.78 | | Adeq. Prec. | 33.514 | | |
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