Design and experimental tests on hydraulic actuator made of composite material

2020 ◽  
Vol 232 ◽  
pp. 111544 ◽  
Author(s):  
Luigi Solazzi
Keyword(s):  
Composite Material ◽  
Experimental Tests ◽  
Hydraulic Actuator

A Prototype Two-Axis Hydraulic Actuator

1976 ◽  
Vol 190 (1) ◽  
pp. 245-254
Author(s):  
C.R. Burrows ◽  
T.P. Adams
Keyword(s):  
Experimental Tests ◽  
Design Analysis ◽  
Alternative Solution ◽  
Basic Design ◽  
Hydraulic Actuator ◽  
Simultaneous Rotation

In applications requiring simultaneous rotation about two orthogonal axes it is normal practice to employ some form of gimbal structure. An alternative solution is presented whereby the motion is obtained by a self contained two-axis hydraulic actuator. The design, analysis and manufacture of the device is discussed. Preliminary experimental tests have shown that the basic design of the device is sound. Some possible fields of application are suggested.

Real Time Loading Test Rig for Flight Control Actuators Under PHM Experimentation

2018 ◽  
Author(s):  
P. Chiavaroli ◽  
A. De Martin ◽  
G. Evangelista ◽  
G. Jacazio ◽  
M. Sorli
Keyword(s):  
Flight Control ◽  
Linear Models ◽  
Angular Position ◽  
Experimental Tests ◽  
Hydraulic Actuator ◽  
Loading Test ◽  
Pressure Transducers ◽  
Non Linear ◽  
Flight Controls ◽  
Servo Actuator

The article deals with the architecture, performance, and experimental tests of a test bench for servo-actuators used in flight controls. After the state of the art on the subject, the innovative architecture of the built bench is described, in which flight control actuator under test and load actuator are not in line but mounted perpendicularly. The model of the bench actuating systems is then presented, consisting of the servo-controlled hydraulic actuator, load cell, speed transducer, angular position transducer of the coupling and pressure transducers. For each of these components the nonlinear multi-physics mechatronic model is described, according to the adopted solutions. The adopted force control algorithm is discussed, showing the integrative compensation on the action line and proportional-derivative on the feedback, with speed feedforward. The experimental tests carried out on the bench under stalled conditions are also presented, whose results concerning time and frequency responses are compared with those obtained through the linearized and non-linear numerical model. Finally, the non-linear models of the flight control actuator under test, controlled in position, and of the loading servo-actuator of the bench are joined together, and the results of various simulations are described.

Design of Deposition Head Trajectory for Robotized Filament Winding of Complex Shape Parts

2004 ◽  
Author(s):  
W. Polini ◽  
L. Sorrentino
Keyword(s):  
Mechanical Properties ◽  
Composite Material ◽  
Complex Shape ◽  
Experimental Tests ◽  
Filament Winding ◽  
Structural Constraints ◽  
Cad Cam ◽  
Cam Software ◽  
Wound Composite

When the roving is winding on the die, the tension value may move away the nominal one that has been optimized by considering the quality and the mechanical properties of the wound composite parts. The variance of the tension value during winding from the nominal one strongly depends on the deposition head trajectory. The present work focuses on the planning of the winding trajectory for winding complex shape parts in composite material by a robotized cell. The planning of the winding trajectory should be based on the structural constraints of the robotized cell and on the technological requirements of the process. In particular, this work aims to study the conditions by which the value of the roving tension verges on the nominal one during winding. The developed planning logics and implemented by a CAD/CAM software have been validated by experimental tests. This work represents the first step towards the optimization of the winding trajectory.

scholarly journals Stability and Load-Carrying Capacity of Thin-Walled FRP Composite Z-Profiles under Eccentric Compression

Materials ◽  
2020 ◽  
Vol 13 (13) ◽  
pp. 2956
Author(s):  
Hubert Debski ◽  
Sylwester Samborski ◽  
Patryk Rozylo ◽  
Pawel Wysmulski
Keyword(s):  
Composite Material ◽  
Carrying Capacity ◽  
Progressive Failure ◽  
Compressive Load ◽  
Experimental Tests ◽  
Numerical Results ◽  
Load Carrying Capacity ◽  
Plastic Composite ◽  
Load Carrying ◽  
Thin Walled

This study investigates the effect of eccentric compressive load on the stability, critical states and load-carrying capacity of thin-walled composite Z-profiles. Short thin-walled columns made of carbon fiber-reinforced plastic composite material fabricated by the autoclave technique are examined. In experimental tests, the thin-walled structures were compressed until a loss of their load-carrying capacity was obtained. The test parameters were measured to describe the structure’s behavior, including the phenomenon of composite material failure. The post-critical load-displacement equilibrium paths and the acoustic emission signal enabling analysis of the composite material condition during the loading process were measured. The scope of the study also included performing numerical simulations by finite element method to solve the problem of non-linear stability and to describe the phenomenon of composite material damage based on the progressive failure model. The obtained numerical results showed a good agreement with the experimental characteristics of real structures. The numerical results are compared with the experimental findings to validate the developed numerical model.

Perspective Composite Material Made of Volume Fabric - Experimental Tests

2021 ◽  
Vol 1022 ◽  
pp. 152-158
Author(s):  
Vitaly Evdokimovich Rogov ◽  
Anna S. Chermoshentseva
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Multilayer Structure ◽  
Experimental Tests ◽  
Layered Composite ◽  
Textile Material ◽  
Basic Information ◽  
Multilayer Material ◽  
The Creation ◽  
Fabric Materials

In all industries, composite materials with a multilayer structure are widely used. Each layer of the composite material is a directional fiber impregnated with a binder polymer. Layered composite materials, possessing unique properties and high manufacturability, have a significant drawback - the presence of interlayer defects in material, which reduces the scope of their application. One of the perspective directions for reducing the process of interlayer fracture in composite materials is the use of bulk textile material, which is the reinforcement of the entire multilayer material. This article presents an overview of some researches that provide basic information about the creation of perspective composite material made of volume fabric and materials based on them. We provided open information about manufacturers of 3D fabric materials. We carried out experimental tests with composite materials, which showed that material with transverse threads is 30-35% stronger during end impact than a composite material without reinforcement.

scholarly journals Model for the analysis of thermal conductivity of composite material of natural origin

2019 ◽  
Vol 23 (6 Part A) ◽  
pp. 3513-3523
Author(s):  
Ilija Milicic ◽  
Radomir Folic ◽  
Aleksandar Prokic ◽  
Arpad Ceh
Keyword(s):  
Thermal Conductivity ◽  
Mathematical Model ◽  
Composite Material ◽  
Measurement Data ◽  
Experimental Tests ◽  
Wall Structure ◽  
Passive House ◽  
Average Value ◽  
Passive Houses ◽  
The Continuum

Thermal properties of the wall structure elements made from gel and straw (?Ethno-eco-passive houses?) have been investigated. The gel was made from a mixture of clay, lime, and water. A 1-D mathematical model based on the continuum mechanics, for predicting the thermal conductivity, is proposed. The results obtained by applying the proposed mathematical model were compared with the measurement data of experimental tests, using the Isomet 2114 instrument. The program envisages the measurement of thermal conductivity of three specimens, 5-year-old, comprising three series within 365 days. In the theoretical analysis, the same parameters of thermal stability were treated as in the experiment. The average value of the material thermal conductivity is 0.0990 W/mK, so it can be concluded that, the composite material intended for the envelope of the proposed constructive system ?Ethno-eco-passive house? is verified as thermally suitable.

scholarly journals Construction of a New Type of Modular Tubular Machine

2013 ◽  
Vol 8-9 ◽  
pp. 437-444
Author(s):  
Dan Cristian Popa ◽  
Vasile Ioan Gliga ◽  
Lorand Szabo
Keyword(s):  
Composite Material ◽  
Permanent Magnets ◽  
Experimental Tests ◽  
Magnetic Composite ◽  
Modular Construction ◽  
Soft Magnetic ◽  
Electromagnetic Excitation ◽  
Stator Core ◽  
Soft Magnetic Composite ◽  
New Type

A new type of tubular machine in modular construction that can work either like motor or generator is presented in the paper. It belongs to the transverse flux machines class and operates based on the variable reluctance principle. Two topologies of the machine, with and without permanent magnets (PM), are approached here. A prototype of the tubular machine with electromagnetic excitation, having a stator core built from laminated sheets and the mover core made of soft magnetic composite material, was built and is shown in the paper. The use of the new soft magnetic composite material, Somaloy 700 HR, having 3D magnetic isotropy, brings important advantages in building the structure. The innovative construction, implying the alternation of the magnetic pieces called modules with no-magnetic spacers, has very good performances. A prototype of this machine was built and a test bench equipped with control and monitoring devices in order to perform experimental tests. Some possible applications showing the potential of the proposed machine are also presented.

scholarly journals Effects of pouring technique on orientation of steel and synthetic macrofibres in fibre-reinforced concrete

2020 ◽  
Vol 21 ◽  
pp. 2-10
Author(s):  
Károly Péter Juhász
Keyword(s):  
Composite Material ◽  
Reinforced Concrete ◽  
Fibre Composite ◽  
Experimental Tests ◽  
Mixing Models ◽  
Fibre Reinforced Concrete ◽  
Material Parameters ◽  
Starting Point ◽  
Fibre Composite Material ◽  
Short Fibre Composite

Fibre-reinforced concrete is a short-fibre composite material, whose properties are significantly dependent on the orientation of the mixed fibres. As a starting point, the fibres are assumed to be uniformly distributed and have a uniform orientation. However, in reality, they have a non-uniform distribution owing to various factors. Such deviations in the orientation may have a significant effect on the material parameters, both favourable and unfavourable. In this study, the orientation factors determined based on the mixing models reported in the literature are compared with the results of experimental tests performed in the laboratory, and the effects of the formwork and the pouring methods used on the orientation of both steel and synthetic macrofibres are investigated. Based on the results of the study, the orientation of the fibres (both, steel and macro synthetic) significantly depends on the pouring method, which considerably influences the material parameters of fibre-reinforced concrete.

Atomic structure of interface of intermetallic compound TiAl and nitride Ti2AIN using HREM and image processing

1991 ◽  
Vol 49 ◽  
pp. 570-571
Author(s):  
E. Sukedai ◽  
H. Mabuchi ◽  
H. Hashimoto ◽  
Y. Nakayama
Keyword(s):  
Mechanical Properties ◽  
Image Processing ◽  
Composite Material ◽  
Intermetallic Compound ◽  
Side Surface ◽  
High Resolution Electron Microscopy ◽  
Hexagonal Structure ◽  
Second Phase ◽  
Resolution Electron ◽  
Compound Tial

In order to improve the mechanical properties of an intermetal1ic compound TiAl, a composite material of TiAl involving a second phase Ti2AIN was prepared by a new combustion reaction method. It is found that Ti2AIN (hexagonal structure) is a rod shape as shown in Fig.1 and its side surface is almost parallel to the basal plane, and this composite material has distinguished strength at elevated temperature and considerable toughness at room temperature comparing with TiAl single phase material. Since the property of the interface of composite materials has strong influences to their mechanical properties, the structure of the interface of intermetallic compound and nitride on the areas corresponding to 2, 3 and 4 as shown in Fig.1 was investigated using high resolution electron microscopy and image processing.

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