Theory of the Elastic Net Applied to Cord-Rubber Composites

1983 ◽  
Vol 56 (2) ◽  
pp. 372-389 ◽  
Author(s):  
Samuel K. Clark
Keyword(s):  
Finite Element ◽  
Composite Material ◽  
Sufficient Accuracy ◽  
Intensive Study ◽  
Rubber Composites ◽  
Structural Applications ◽  
Rubber Composite ◽  
The Subject ◽  
Composite Properties ◽  
Elastic Characteristics

Abstract There has been considerable interest over the last twenty years in the subject of the elastic properties of cord-rubber composites. This has been due to the rather intensive study of composite material characteristics, brought about by the increased use of rigid composites in many structural applications. In addition, work on the prediction of cord rubber composite properties has also continued because of the active development of finite element programs for analysis of pneumatic tire properties. These finite element programs require a thorough knowledge of cord-rubber composite elastic characteristics, which in turn are found to be considerably more difficult to calculate than had been originally thought. The present paper introduces a simplified theory for the prediction of such properties with sufficient accuracy for engineering uses.

Red Mud Powders Applied on Filling Rubber Composite Material

2013 ◽  
Vol 821-822 ◽  
pp. 1223-1226
Author(s):  
Yong Guang Fang ◽  
Zheng Ke Chen ◽  
Yu Qian
Keyword(s):  
Particle Size ◽  
Composite Material ◽  
Particle Size Distribution ◽  
Fluorescence Spectroscopy ◽  
Size Distribution ◽  
Red Mud ◽  
Fine Particles ◽  
Rubber Composites ◽  
Rubber Composite

Red mud is a kind of fine particles which with a strong alkalin value. The paper used red mud powder to prepare red mud-rubber composite for the feasibility of recycling about red mud. XK-160 open-mixing machine, QLB Series vulcanizing machine, multifunction electronic tensile machine, JC-1086 rotary roller, fluorescence spectroscopy analyzer, BT-9300 laser particle size distribution analyzer etc were used for test. The results showed that red mud in rubber composites played as beneficiations added in rubber significantly.

A Different Approach for Obtaining the Shear Moduliof a Composite Material

2020 ◽  
Vol 70 (12) ◽  
pp. 4470-4476
Keyword(s):  
Finite Element ◽  
Composite Material ◽  
Elastic Modulus ◽  
Shear Modulus ◽  
Finite Element Model ◽  
Element Model ◽  
Layered Composite ◽  
Element Analysis ◽  
Shear Elastic Modulus ◽  
Elastic Characteristics

In recent years the composites materials gained a major importance in all fields of engineering, because they offer a successful replacement for classical materials conferring similar elastic-mechanical properties to metal or non-metal alloys presenting several advantages such as reduced mass, chemical resistance etc. Considering this, during the design, dull knowledge of the elastic-mechanical characteristics is of high importance. The present paper aims to create a finite element model able to predict the shear elastic modulus of a double-layered composite material based on the elastic characteristics of its constituents. For this, once the elastic characteristics of the constituents determined, they could be used in the finite element analysis obtaining consequently the shear modulus for the composite material. Also, the shear elastic modulus of the resultant composite was determined experimentally. The results of the finite element model were compared to the experimental values in order to validate the finite element analyses results. Keywords: composites, fiberglass, shear modulus, FEM

Large Deformation Micropolar Theory for Cord Rubber Composites

1995 ◽  
Vol 68 (1) ◽  
pp. 77-96 ◽  
Author(s):  
Joe Padovan ◽  
Hua Parris ◽  
Jin Ma
Keyword(s):  
Finite Element ◽  
Asymptotic Behavior ◽  
Large Deformation ◽  
Micropolar Theory ◽  
Rubber Composites ◽  
Moment Stress ◽  
Response Characteristics ◽  
Curve Fit ◽  
Rubber Composite ◽  
Axial Twist

Abstract Based on a 2nd Piola Kirchhoff type formulation, a new unipolar cord rubber composite constitutive theory is developed. It has the capability to handle the local/global effects of cord twist under both small and large deformation situations. In this context, the theory handles the coupling between stress and moment stress and associated kinematics. The development also handles several new Poisson effects which involve the coupling of both axial elongation and twist, as well as axial twist and lateral elongation. The theory incorporates both experimentally and analytically based parameters to define the various response characteristics. The analytical results involve the use of several finite element simulations to define local cord rubber response. Several elasticity/strength of materials based limiting arguments were used to define asymptotic behavior, thereby providing for a more physics based curve fit of empirical data.

Simulation of characteristics of composite material with «liquid» matrix

2021 ◽  
Vol 0 (11) ◽  
pp. 28-35
Author(s):  
E. A. Kosenko ◽  
◽  
V. A. Nelyub ◽  
Keyword(s):  
Finite Element ◽  
Composite Material ◽  
Theoretical Model ◽  
Crack Growth ◽  
Strain State ◽  
Load Factor ◽  
Liquid Matrix ◽  
Finite Element Software ◽  
Reinforcing Filler ◽  
Elastic Characteristics

A theoretical model of composite material consisting of a fibrous reinforcing filler, epoxy and elastomer matrices is proposed. The main purpose of the elastomer matrix is relaxation of all stresses occurring under loading and blocking the crack growth. Such elastomer matrices were named as «liquid». The calculation of the stress-strain state of the developed composite material with «liquid» matrix was carried out by using the finite-element software Ansys. It was found out that when elastic characteristics of used elestomers were less, the level of maximal stresses was less and the load factor values were higher. Decreasing stresses results in the blocking of crack growth that leads to increasing durability of such materials.

scholarly journals On Obtaining the Young Modulus from Numerical Analysis of Composite Material Constituent

2018 ◽  
Vol 55 (4) ◽  
pp. 712-717 ◽  
Author(s):  
Sorin Draghici ◽  
Horia Alexandru Petrescu ◽  
Anton Hadar
Keyword(s):  
Finite Element ◽  
Composite Material ◽  
Elastic Modulus ◽  
Finite Element Model ◽  
Young Modulus ◽  
Element Model ◽  
Layered Composite ◽  
Element Analysis ◽  
Longitudinal Elastic Modulus ◽  
Elastic Characteristics

Importance and use of composite materials are no longer a subject that should be emphasized. They offer a successful replacement for classical materials in most areas of engineering, conferring similar elastic-mechanical properties to metal or non-metal alloys with several advantages such as reduced mass, chemical resistance etc. Considering this, knowledge of the elastic-mechanical characteristics is of utmost importance. The present article aims to create a finite element model that can predict the longitudinal elastic modulus of a double-layered composite material based on the elastic characteristics of its constituents. For this, the elastic characteristics of the constituents were determined, then used in the finite element analysis thus obtaining the Young�s modulus for the numerical composite material. Also, the longitudinal elastic modulus of the resultant composite was determined experimentally. The results of the finite element model were compared with experimental values.

The effect of zeolite particle modified by PEG on rubber composite properties

2015 ◽  
Vol 22 (6) ◽  
Author(s):  
Qinghong Fang ◽  
Xiaochen Liu ◽  
Na Wang ◽  
Chi Ma ◽  
Feng Yang
Keyword(s):  
Heat Generation ◽  
Surface Characteristics ◽  
Rubber Composites ◽  
Elongation At Break ◽  
Modified Zeolite ◽  
Rubber Composite ◽  
Zeolite Particle ◽  
Hysteresis Heat ◽  
Composite Properties ◽  
Reinforcing Filler

AbstractThe purpose of this paper was to investigate the surface modification of zeolite with polyethylene glycol (PEG) and the modified zeolite as a reinforcing filler partly replacing carbon black (CB) into rubber to prepare the rubber composites. The surface characteristics of zeolite modified by PEG and the unmodified zeolite were characterized by infrared (IR) spectroscopy and scanning electron microscopy (SEM). Moreover, the evaluations of the zeolite/rubber composite were carried out on characteristics such as tensile property, abrasion loss, and hysteresis heat generation with different amounts of zeolite and PEG. The results showed that the tensile strength and elongation at break of the composites were improved, and the abrasion and lag heat generation were reduced when 5–8 phr zeolite modified by 3 wt% PEG was filled into rubber. These results indicated that the modified zeolite has a good compatibility and dispersion in rubber.

Analytical and High-Resolution EM Study of Crystalline Phases formed at Metal-Ceramic Interface

1990 ◽  
Vol 48 (2) ◽  
pp. 426-427
Author(s):  
N. Merk ◽  
A. P. Tomsia ◽  
G. Thomas
Keyword(s):  
Cross Section ◽  
Dissimilar Materials ◽  
Ceramic Materials ◽  
Electron Micrograph ◽  
Scanning Electron Micrograph ◽  
Structural Applications ◽  
Metal Ceramic ◽  
The Subject ◽  
Ceramic Compounds ◽  
Scanning Electron

A recent development of new ceramic materials for structural applications involves the joining of ceramic compounds to metals. Due to the wetting problem, an interlayer material (brazing alloy) is generally used to achieve the bonding. The nature of the interfaces between such dissimilar materials is the subject of intensive studies and is of utmost importance to obtain a controlled microstructure at the discontinuities to satisfy the demanding properties for engineering applications . The brazing alloy is generally ductile and hence, does not readily fracture. It must also wett the ceramic with similar thermal expansion coefficient to avoid large stresses at joints. In the present work we study mullite-molybdenum composites using a brazing alloy for the weldment.A scanning electron micrograph from the cross section of the joining sequence studied here is presented in Fig. 1.

Finite Element Simulation of Tire-Rim Interface

1989 ◽  
Vol 17 (4) ◽  
pp. 305-325 ◽  
Author(s):  
N. T. Tseng ◽  
R. G. Pelle ◽  
J. P. Chang
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Finite Element Simulation ◽  
Contact Pressure ◽  
Element Model ◽  
Experimental Measurements ◽  
Inflation Pressure ◽  
Interference Fit ◽  
Element Simulation ◽  
Rubber Composite

Abstract A finite element model was developed to simulate the tire-rim interface. Elastomers were modeled by nonlinear incompressible elements, whereas plies were simulated by cord-rubber composite elements. Gap elements were used to simulate the opening between tire and rim at zero inflation pressure. This opening closed when the inflation pressure was increased gradually. The predicted distribution of contact pressure at the tire-rim interface agreed very well with the available experimental measurements. Several variations of the tire-rim interference fit were analyzed.

Fatigue of Unidirectional Cord-Rubber Composites

1999 ◽  
Vol 27 (1) ◽  
pp. 48-57 ◽  
Author(s):  
Y. Liu ◽  
Z. Wan ◽  
Z. Tian ◽  
X. Du ◽  
J. Jiang ◽  
...  
Keyword(s):  
Damage Accumulation ◽  
Fatigue Testing ◽  
Fatigue Behavior ◽  
Constant Load ◽  
Testing System ◽  
Rubber Composites ◽  
Cycle Frequency ◽  
Periodic Loading ◽  
Fatigue Damage Accumulation ◽  
Rubber Composite

Abstract A fatigue testing system is established with which the real-time recording of stress, strain, temperature, and hysteresis loss of rubbers or cord-rubber composite specimens subjected to periodic loading or extension can be successfully carried out. Several problems are connected with the experimental study of the fatigue of rubber composites. In constant extension cycling, the specimen becomes relaxed because of the viscoelasticity of rubber composites, and the imposed tension-tension deformation becomes complex. In this method, the specimen is unlikely to fail unless the imposed extensions are very large. Constant load cycling can avoid the shortcomings of constant extension cycling. The specially designed clamps ensure that the specimen does not slip when the load retains a constant value. The Deformation and fatigue damage accumulation processes of rubber composites under periodic loading are also examined. Obviously, the effect of cycle frequency on the fatigue life of rubber composites can not be ignored because of the viscoelasticity of constituent materials. The increase of specimen surface temperature is relatively small in the case of 1 Hz, but the temperature can easily reach 100°C at the 8 Hz frequency. A method for evaluating the fatigue behavior of tires is proposed.

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