Analytical development on impact behaviour of composite sandwich laminates by differentiated loading regimes

Correas, A. Chao; Ghasemnejad, H.

doi:10.1016/j.ast.2022.107658

Cited by 7 publications

(4 citation statements)

References 28 publications

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“…When replacing bearing supports, gearboxes and gear rims with rod elements, the following assumptions were made:  bearing elements of a ball bearing: balls were approximated by rods with rigid fastenings at the ends; The stand was modeled in ANSYS computer-aided design system, and bench was approximated by 420510 finite elements [14,15].…”

Section: Resultsmentioning

confidence: 99%

“…In particular, a modified program for determining the stiffnessfrequency characteristics of gearboxes was tested in comparison with experimental data, which showed their good agreement, within 10-15%. The stand was approximated by finite elements, volumetric and surface finite elements [11][12][13][14][15]. The performed calculations made it possible to determine the stress-strain state of the stand by layers (Figure 4) under dynamic loads: operational angular velocity around the vertical axis of the stand.…”

Section: Discussionmentioning

confidence: 99%

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The computer modeling and analysis of complex dynamic structures of robotics from composite materials

Khayrnasov,

Sokolskiy,

Isaev

2023

E3S Web Conf.

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The methods of designing and modeling dynamic stands from a composite material are considered. One of the complex elements of the stands is the elements that ensure the dynamic behavior of the channels of the stand: bearing supports, gear rims, gearboxes, motors, servo drives, etc. Approximation of these elements in numerical methods for calculating and studying dynamic structures (finite element method) is a difficult task. Direct approximation of these elements does not satisfy the adequacy. Various approaches are used to adequately approximate such elements. In this paper, a methodology is proposed that consists in determining the rigidity parameters of bearing supports, gear rims, gearboxes and motors. In the future, these elements are replaced by rod systems corresponding to the replaced elements in terms of stiffness parameters. The effectiveness of the proposed method is confirmed by a comparison with of available experimental methods. The shell structures and stands were modeled in ANSYS modeling module. The considered methods for designing stands can be applied to robotic systems, weaving machines and dynamic systems for various purposes, since they contain all the elements inherent in the considered stand. The finite element approximation of the stand was carried out by elements of various types.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

The computer modeling and analysis of complex dynamic structures of robotics from composite materials

Khayrnasov,

Sokolskiy,

Isaev

2023

E3S Web Conf.

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“…A significant number of works have been devoted to the study of structures made of composite materials. But all works mainly consider individual structural elements [9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Influence of orientation of layers of a multilayer composite material on the stressed state of a robotic structure under dynamic loading

Khayrnasov

2023

E3S Web of Conf.

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The paper developed a method for calculating the stress-strain state of a robotic structure made of composite material under dynamic action. The bearing capacity of multilayer composite materials is affected by the location of the warp threads of the composite material. By changing the orientation of the layers, it is possible to change the bearing capacity of the composite material. In the present work, such a study was carried out for a robotic system made of a composite material under the action of a dynamic operational load. An eight-layer composite material with different layer orientations was considered. Carbon fiber was used as the basis. As a robotic system stand was considered, designed to simulate flight characteristics in laboratory conditions. The simulation of the stand was carried out. The bench was approximated by finite elements. The convergence of the results of the finite element model of the stand was checked by condensing the finite element mesh and comparison the results obtained. Robotic systems are equipped with elements that move the channels: bearings, gear rims, gearboxes, motors. In the present study they were replaced in the finite element model with a system of bar elements of identical stiffness. The design of the stand was a three-layer structure, consisting of external carrier layers of an eight-layer composite material and a filler layer between the carrier layers of lightweight material in the form of foam and used to absorb shear stresses and prevent the bearing layers from approaching. Calculation and analysis of the design of the stand for dynamic load is carried out, the stress-strain state of the stand is obtained for different arrangement of the layers of the composite material.

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“…This study presents an algorithm for calculating the stiffness of such structures and replacing them in the structure with a system of bar structures of identical stiffness. Composite materials are used in many structures, especially in structures where inertial characteristics are of great importanceaircraft building, mechanical engineering [13][14][15][16][17][18][19][20]. In addition, composite materials have a higher specific strength and corrosion resistance compared to homogeneous metals.…”

Section: Introductionmentioning

confidence: 99%

Influence of arrangement of layers of composite material on the bearing capacity of a robotic system

Khayrnasov,

Sokolskiy,

Isaev

2023

E3S Web Conf.

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The robotic system is considered as a rack made of composite material, which is under dynamic influence. A method for determining the reduced characteristics of a multilayer composite material is given. The simulation of the stand was carried out. To approximate the details of the movement of bench channels: bearings, gearboxes, gear rims, motors, an algorithm and a program for calculating the rigidity of these structures have been developed in order to approximate these elements in the finite element method by replacing such elements with a system of rod structures with rigidity identical to the replaced structures: bearings, gear crowns, gearboxes, motors. The convergence of the calculation results is checked by thickening the finite element mesh. The pinching along the base of the stand was taken as the boundary conditions. A technique has been developed for modeling a three-layer stand structure. The technique for modeling a three-layer structure consists in modeling a stand, assigning filler material to it, and creating shell bearing layers on the surface of the stand, assigning it the characteristics of a multilayer composite material. A layer-by-layer stress-strain state of a stand made of composite material has been obtained. The analysis of the influence of the orientation of the layers of a five-layer composite material on the stress-strain state of the HIL simulation bench has been carried out.

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Analytical development on impact behaviour of composite sandwich laminates by differentiated loading regimes

Cited by 7 publications

References 28 publications

The computer modeling and analysis of complex dynamic structures of robotics from composite materials

The computer modeling and analysis of complex dynamic structures of robotics from composite materials

Influence of orientation of layers of a multilayer composite material on the stressed state of a robotic structure under dynamic loading

Influence of arrangement of layers of composite material on the bearing capacity of a robotic system

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