In the past two decades, modal analysis has become a major tool in the quest for determining, improving and optimizing dynamic characteristics of engineering structures. Not only has it been recognized in mechanical and aeronautical engineering, but also modal analysis has discovered profound applications for civil and building structures, biomechanical problems, space structures, acoustical in...

Abstract Metal-composite laminates and joints are applied in aircraft manufacturing maintenance (repairing) using aluminum alloys (AA) glass fiber-reinforced polymer (GFRP). In these applications, drilling has a prominent place due to its vast application aeronautical structures’ mechanical joints. Thus, this study presents the influence of uncoated carbide drills (85C, 86C, H10N), cutting spee...

Hybrid composite laminates are manufactured by using technologies and raw materials of the aeronautic sector with aim to improve damping behavior structures. Matrix hybridization was achieved laminating carbon fiber reinforced (CFR) plies elastomer interlayers. Up 10 different sandwich architectures were investigated changing stacking sequence, thickness layers, typology, whereas total number C...

An overview of what structural health monitoring (SHM) is, its historic background, the approaches being applied and the benefits to be expected with regard to damage tolerant aeronautical structures is described in this article.

The paper reviews the National Aeronautical and Space Administration’s (NASA) research program, flight experiments and flight application related to Adaptive Structures. Emphasis is on results from both experimental and flight hardware test programs that helps validates its theoretical performance. The paper includes the role of Adaptive Structures to meet NASA’s current and future technology a...

The band 1 435 – 1 525 MHz is a primary band used for Aeronautical Mobile Telemetry. This noise-limited band is ideal in terms of its propagation characteristics, the maturity of technology for implementing telemetry systems, and the relatively large signal wavelengths. The latter are large enough with respect to the size of aircraft structures to minimize unwanted geometrical effects, such as ...