Comparative numerical and experimental investigation of static and dynamic characteristics of composite plates

Baltić, Marija; Svorcan, Jelena; Perić, Bojan; Vorkapić, Miloš; Ivanov, Toni; Peković, Ognjen

doi:10.1007/s12206-019-0507-7

Cited by 9 publications

(4 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A novel and attractive contactless digital image correlation (DIC) system based on the principles of digital photography and modern computer technology can be used for point displacement measurement [5,6]. A typical DIC system [9,10] consists of a sensor unit (A) (in our case two highquality, ultrafast cameras FASTCAM SA6 75K-M3 with 32 GB memory, maximum recording frequency 75.000 fps, maximum resolution 1920 × 1440 pixels), a power control device for image recording (performed by the Photron software package here) and a system for data acquisition, processing and analysis (B) (in our case done by the ARAMIS software package) and a sample set-up (C), see Fig. 2.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…This paper investigates the possibility of applying a novel, contactless, non-invasive method [5][6][7][8][9][10] to observe the changes in the natural frequencies of composite plates that have been deliberately damaged. Here, damage is defined as a series of changes in material structure and/or physical characteristics that affect the performance and integrity of the whole system.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Modal analysis of composite plates: Digital image correlation method application

Baltić¹,

Vorkapić²,

Ivanović³

et al. 2023

tribomat

View full text Add to dashboard Cite

Composite materials and structures are widely used and applied in many industries owing to their advantages, such as satisfactory stiffness-to-mass ratio and corrosion resistance. However, during their operating life, responsible parts subject to complex loads may change and their properties might deteriorate. To ensure structural integrity it is necessary to monitor and regularly check the performance of composite structures. This paper investigates the change of frequency characteristics of two rectangular composite (carbon-epoxy) plates after inflicting structural damage. Following the necessary preparation of the structure's upper surfaces by white-and-black stochastic pattern, the responses (free vibratory movement) of structures to momentary excitation were recorded by an optical, contactless 3D digital image correlation (DIC) system that contains a set of ultrafast cameras. In order to determine the natural frequencies of the plates, the recorded time-domain responses were post-processed, i.e. converted to the frequency domain by fast Fourier transform (FFT). The reduction in values of natural frequencies is observed on the damaged structures. The performed experiments demonstrate the applicability of the DIC method in the structural health monitoring of composite parts.

show abstract

Section: Experimental Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modal analysis of composite plates: Digital image correlation method application

Baltić¹,

Vorkapić²,

Ivanović³

et al. 2023

tribomat

View full text Add to dashboard Cite

show abstract

“…To start recording with the Aramis system, in addition to sample preparation, it is necessary to calibrate the hardware and create calibration images before beginning of measurements. [45][46][47][48][49] Factors which are influencing the quality of measurements are the illumination of the object, the distance of the measuring object from the cameras, as well as the calibration of the cameras. Calibration is, also, necessary in order to adjust all camera parameters and annul all possible irregularities.…”

Section: Video Analysismentioning

confidence: 99%

Development of methodologies for experimental analysis of neck deformations caused by impact forces in martial arts

Milošević

Trajković

Golubović

et al. 2022

Advances in Mechanical Engineering

Self Cite

View full text Add to dashboard Cite

Martial arts and fight sports are mostly based on exchanging the punches and kicks that often result with injuries of face, skull bones, and neck vertebrae. One of possibilities to reduce number of injuries in athletes who deal with martial arts is development of new materials and improvement of designs for helmets used in sport fights. In order to experimentally analyze impact forces and simulate conditions during different fight punches mechanical installment was made. Aramis system is used to measure the displacement fields and the distribution of deformations which occur on the neck over the entire analyzed area based on the correlation of digital images. On this manner better understanding of behavior of both materials and structures during the action of the impact forces and loading is obtained. This information can further be used in researches related to the development of helmets used in martial arts which would influence reduction of values of neck deformations in athletes.

show abstract

“…offer the greatest benefits at the lowest possible cost. This is also true for composite structures so much employed in aerospace [6][7][8][9] including wind energy sector [10], naval/shipbuilding and automotive industries as well as civil engineering [11]. Inspired by the huge numbers of possible design solutions, Dulcey et al [12,13] even developed a robust supporting platform for reliable decision making in the design of composite laminated structures that was also used for optimization studies.…”

Section: Introductionmentioning

confidence: 99%

Multi-objective Optimization and Experimental Testing of a Laminated Vertical-Axis Wind Turbine Blade

Trivković

Svorcan

Baltić

et al. 2021

Current Problems in Experimental and Computational Engineering

Self Cite

View full text Add to dashboard Cite

Vertical-axis wind turbines, despite being somewhat uncommon and less efficient renewable energy converters, still offer many advantages to small consumers and possibilities for further improvement. Their rotor is usually made up of fiberglass composite blades that can be optimized both aerodynamically and/or structurally. Although the aerodynamics of vertical-axis wind turbine rotors is unsteady, complex and challenging to simulate, it is possible to make a sufficiently accurate estimation of variable aerodynamic loads acting on the blade and use them for its structural dimensioning. This research combines a multi-objective constrained optimization procedure by particle swarm and finite element method with experimental analyses with the purpose of defining the best blade, i.e. the blade of minimal mass, least tip deflection under the loading case corresponding to the aerodynamically most demanding operational regime, greatest difference between its natural frequencies and rated rotor angular frequency, lowest manufacturing cost and complexity, etc. Imposed constraints also include acceptable failure criteria along the blade. Design variables refer to ply lay-up scheme, i.e. lamina thicknesses and orientations. Final solution, chosen from the obtained Pareto set, was manufactured and experimentally validated. The consistency of strains, measured in several different cases of bending, and corresponding numerical values was mostly below 8%. The study demonstrates the applicability of the employed multi-objective optimization methodology in wind turbine blade design. It also proposes an affordable and structurally reliable composite lay-up scheme specifically designed for small-scale vertical-axis wind turbines.

show abstract

Comparative numerical and experimental investigation of static and dynamic characteristics of composite plates

Cited by 9 publications

References 16 publications

Modal analysis of composite plates: Digital image correlation method application

Modal analysis of composite plates: Digital image correlation method application

Development of methodologies for experimental analysis of neck deformations caused by impact forces in martial arts

Multi-objective Optimization and Experimental Testing of a Laminated Vertical-Axis Wind Turbine Blade

Contact Info

Product

Resources

About