The processing technology of steel structural elements aircraft parts is especially important since, if improperly processed, this material can be subjected to weathering, causing corrosion. Furthermore, special attention paid the walls holes used for bolting. Since become stress concentrators, paper proposes strengthen them by implementing SPD (surface plastic deformation) method. article desc...

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We find accurate quasinormal frequencies of a quantum corrected black hole constructed in the renormalization group theory via coordinate-independent iterative procedure, leading to Dymnikova regular hole. show that while fundamental mode is only slightly affected by correction, overtones change at much stronger rate. This outburst occurs because deformation geometry Schwarzschild solely near e...

Composite materials are widely employed in the naval, aerospace and transportation industries owing to the combination of being lightweight and having a high modulus of elasticity, strength and stiffness. Drilling is an operation generally used in composite materials to assemble the final product. Damages such as the burr at the drill entrance and exit, geometric deviations and delamination are...

This work studies the open hole surface integrity of Al 2024-T3/Ti-6Al-4V stacks, which have been subjected to different making methods, namely, conventional drilling and helical milling. The resulting hole-exit burr, roughness machined surface/sub-surface microstructures characterized impact on fatigue performance coupons has revealed. Results show that milling can effectively reduce burr form...