Influence of the composite modification of the wooden wing skin of the glider on deflection lines and resonance vibrations

Skórski, Witold Wojciech; Zawisza, Maciej

doi:10.14314/polimery.2019.4.4

Cited by 4 publications

(4 citation statements)

References 3 publications

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“…The samples were modeled in SolidWorks 2023 to verify moments of inertia relative to the initial coordinate system. The specific density of the three-layer carbon fiber sample according to the program should be 1780 kg/m 3 , while the density determined from mass and calculated volume is 1.51 g/cm 3 . The density of the SMA wire according to the literature is 6500 kg/m 3 , while from the determined mass and calculated volume it is 6570 kg/m 3 .…”

Section: Resultsmentioning

confidence: 99%

“…A prime example of this advancement is seen in composite materials, which demonstrate significant innovative potential across various technological sectors. Notably, these include aviation [1][2][3], the automotive industry [4], and space technology [5,6], among others. The primary benefits of composites lie in their excellent strength-to-weight ratio, high stiffness, and versatility in shaping.…”

Section: Introductionmentioning

confidence: 99%

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The Influence of Variable Stiffness of the Shape Memory Alloys Carbon Composite Structure on Mechanical Vibration

Markuszewski,

Wądołowski,

Krajewski

2024

Materials

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The purpose of this study is to investigate the dynamic properties of new structures formed by combining carbon fiber and epoxy resin-based composite materials with SMA (shape memory alloy) “smart materials” in the form of NiTiNol wire. Such a combination will have an impact on the dynamics of the structure, especially in terms of stiffness controllability. Key mechanical parameters such as natural frequency and stiffness, as well as the effect of temperature, were determined through experimental studies.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Influence of Variable Stiffness of the Shape Memory Alloys Carbon Composite Structure on Mechanical Vibration

Markuszewski,

Wądołowski,

Krajewski

2024

Materials

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“…So-called “dedicated materials”, with a specific structure that depends on the type of acting loads, are increasingly being used. The spectrum of their application is wide ranging, from aviation to automotive, and marine to space industries [ 6 , 7 , 8 , 9 ]. Additionally, the military industry is looking for materials with specific properties.…”

Section: Introductionmentioning

confidence: 99%

Experimental Determination of the Coefficient of Restitution for Selected Modern Hybrid Composites

2021

Self Cite

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Composite materials (fiber reinforced plastics, FRPs) are successfully utilized in the production of various mechanical devices, including land vehicles, marine vessels, and aircrafts. They are primarily used for the production of body parts and hulls. Due to their importance, certain requirements relating to the mechanical properties of the materials used must be met for such applications. One aspect of the passive safety of vehicles is the effects of a possible collision with another object. The behavior of the structure in such a case can be determined based on the coefficient of restitution, which is a measure of energy dissipation after an impact. This paper presents the results of measuring the value of the coefficient of restitution for the selected composite materials, utilizing various reinforcement materials including different types of fibers and wooden veneer. The selected materials included glass, carbon, Kevlar fibers, and veneer from exotic wood in an epoxy resin matrix. The tested samples were made using various methods in order to understand the influence of the technology on the value of the coefficient. The authors determined the coefficient values utilizing two methods based on the measurement of two different physical quantities. In the first case, the height of the rebound of the ram was measured using a fast digital camera; in the second case, the time between successive rebounds of the tool was measured, determined based on the signal from the acceleration sensor. The authors compared the results of the coefficient values obtained using these methods and examined the relationship between the rebound energy and the value of the coefficient of restitution. The results have been discussed, and some conclusions have been made. Among other things, it seems that both methods of measurement are interchangeable with regard to lower impact velocities corresponding to lower heights (up to 300 mm) of the drop of the ram used in the tests.

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“…The main difficulty is the fact that nonaxisymmetric composite structures are non-linear, which requires each time to carry out a rather labour-intensive modeling process [2], [9], [10], [11], [17].…”

Section: Introductionmentioning

confidence: 99%

Comparison of various types of damage symptoms in the task of diagnostics composite profiles

Markuszewski¹

2019

Diagnostyka

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The current trend of weight reduction entails a reduction in safety factors. This approach is understandable, but light profiles are more susceptible. The structure works close to the boundary loads, and their destruction is primarily determined by dynamic relief. Today, composite masts are diagnosed by the following methods: optical microscopy, electron microscopy, X-ray analysis and thermal analysis. These methods are invasive methods. It seems that the vibration analysis of the mast-rigging system could supplement or replace the mentioned methods without the need to dismantle the mast, giving the possibility of testing on the yacht [5]. The article presents the possibility of diagnosing a composite material defect on the example of a interrupts a continuity of structure.

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Influence of the composite modification of the wooden wing skin of the glider on deflection lines and resonance vibrations

Cited by 4 publications

References 3 publications

The Influence of Variable Stiffness of the Shape Memory Alloys Carbon Composite Structure on Mechanical Vibration

The Influence of Variable Stiffness of the Shape Memory Alloys Carbon Composite Structure on Mechanical Vibration

Experimental Determination of the Coefficient of Restitution for Selected Modern Hybrid Composites

Comparison of various types of damage symptoms in the task of diagnostics composite profiles

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