Mechanical Behavior of Hierarchical Synthetic Composites

1991 ◽  
Vol 255 ◽  
Author(s):  
George Mayer
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Mechanical Behavior ◽  
Synthetic Materials ◽  
Natural Composites ◽  
Natural And Synthetic

AbstractDiverse microstructures observed in rigid natural composites have been linked to mechanical properties that are equal to and, at times, superior to those which have been designed into synthetic composite materials comprised of organic, metallic, and ceramic constituents. The constitution, properties, and microstructures of the natural and synthetic materials are described, along with what is known and what is unknown about the constituent components, and interfaces. Hierarchical approaches to designing with and the mechanical analyses of both natural and synthetic composites will be described.

Surface Texture and Mechanical Behavior of Claw Material in Beetle Dorcus titanus (Coleoptera: Lucanidae)

2013 ◽  
Vol 461 ◽  
pp. 305-312 ◽  
Author(s):  
Zhi Xian Yang ◽  
Ze Hua Liu ◽  
Zhen Dong Dai
Keyword(s):  
Mechanical Properties ◽  
Mechanical Behavior ◽  
Hierarchical Structure ◽  
Surface Texture ◽  
Smooth Surface ◽  
Biological Materials ◽  
Industrial Products ◽  
Biomimetic Materials ◽  
Nanomechanical Properties ◽  
Synthetic Materials

Biomaterials have an integrated, hierarchical structure with outstanding mechanical properties which are far beyond those achieved by using the same synthetic materials. nanoindentation techniques have recently been adapted for studying the biological materials. In this paper, the surface texture and nanomechanical properties of claw material in beetle Dorcus titanus were investigated. It is founded that the claw possesses of an optimized shape as well as the non-smooth surface texture with many stripes like as the fullows close to the arc inside. The results of nanoindentation tests indicate that the modulus value of the claw cuticle near the tip (11.25±0.57 GPa) is over three times larger than that near the claw root (3.61±0.22 GPa) and there is an incremental hardness and modulus values from the claw root to the tip. Quantitive measurements on the nanomechanical properties of claw material could help to develop biomimetic materials suitable for industrial products.

Mechanical Property and Microstructure of TZP and TZP/Al2O3 Composites

1986 ◽  
Vol 78 ◽  
Author(s):  
Koji Tsukuma ◽  
Tsutomu Takahata
Keyword(s):  
Mechanical Properties ◽  
Mechanical Property ◽  
Composite Material ◽  
Composite Materials ◽  
Mechanical Behavior ◽  
Tetragonal Phase ◽  
Type Structure ◽  
Fine Grained

ABSTRACTThere are various types of microstructure in the TZP materials and their composite materials. The fine-grained microstructure is well-known as the basic microstructural type of TZP materials. Y-TZP and Ce-TZP belong to this group. The large-grained microstructure can exist in the TZP consisting of the tetragonal phase with low metastability, that is, Y-TZP doped with TiO2 and Ce-TZP containing a high CeO2 content. The composite material between Y-TZP and β-lanthanum alumina possessed a unique microstructure including elongated grains of β-Al2O3 type structure. This study provides a summary of the mechanical properties of these TZP and β-Al2O3 type structure composite materials, and points out how the mechanical behavior depends on the microstructural features.

Predicting Mechanical and Thermal Behavior of Multiphase Composite Containing Phase Change Material (PCM) by Micromechanical Approaches

2015 ◽  
Vol 798 ◽  
pp. 430-434
Author(s):  
Salma Barboura ◽  
Jugurtha Meddour ◽  
Mohammed Haboussi ◽  
Mouhand Said Kachi ◽  
Laurent Royon
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Composite Materials ◽  
Thermal Behavior ◽  
Phase Change ◽  
Mechanical Behavior ◽  
Thermal And Mechanical Properties ◽  
Macro Modeling ◽  
Change Material ◽  
Multiphase Composite

This work is devoted to the study of thermal and mechanical properties (stiffness and thermal conductivity tensors) of multiphase composite materials (mortar with PCMs). A micro-macro modeling is presented in order to predict these properties by using some classical homogenization schemes. The effective thermo-mechanical behavior is then analyzed by considering various PCM particle forms, concentrations, and orientations.

scholarly journals The Influence of Non-Uniformities on the Mechanical Behavior of Hemp-Reinforced Composite Materials with a Dammar Matrix

Materials ◽  
2019 ◽  
Vol 12 (8) ◽  
pp. 1232 ◽  
Author(s):  
Dumitru Bolcu ◽  
Marius Marinel Stănescu
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Mechanical Behavior ◽  
Structural Changes ◽  
Quality Factors ◽  
Hybrid Resin ◽  
Reinforced Composite ◽  
Strain Stress ◽  
Reinforcing Material ◽  
Hemp Fabric

As a result of manufacture, composite materials can appear to have variations to their properties due to the existence of structural changes. In this paper, we studied the influence of material irregularity on the mechanical behavior of two categories of bars for which we have used hemp fabric as a reinforcing material. The common matrix is a hybrid resin based on Dammar and epoxy resin. We molded two types of bars within each of the previously mentioned categories. The first type, also called “ideal bar”, was made of layers in which the volume proportion and the orientation of the reinforcing material was the same in each section. The ideal bar does not show variations of mechanical properties along it. The second type of bar was molded to have one or two layers where, between certain sections, the reinforcing material was interrupted in several segments. We have determined some mechanical properties, the characteristic curves (strain-stress), the tensile strength, and elongation at break for all the sample sets on trial. Moreover, we have studied the influence of the non-uniformities on the mechanical behavior of the composites by entering certain quality factors that have been calculated after experimental determinations.

Micromechanical Analysis of Composites with Short Fibers and Particles

2007 ◽  
Vol 348-349 ◽  
pp. 577-580 ◽  
Author(s):  
Alexandre Casaril ◽  
Eduardo Rovaris Gomes ◽  
Marcos Roberto Soares ◽  
Hazim Ali Al-Qureshi
Keyword(s):  
Mechanical Properties ◽  
Composite Material ◽  
Composite Materials ◽  
Simple Model ◽  
Mechanical Behavior ◽  
Correction Factor ◽  
Fracture Strength ◽  
Reasonable Agreement ◽  
Raw Material ◽  
Short Fibers

This work presents the investigation of the mechanical behavior of composite materials strengthened with short fibers and particles. A simple model is presented, with the purpose of predicting the fracture strength of this class of composite material. The model consists of the modification of the rule of mixtures, by the introduction of a correction factor, which corresponds to the adhesion of the resin to the fiber and the particles. The experiments were performed on three different composite materials having the same raw material but different mixture ratios. The composite materials produced were tested by the three-point flexural method, according to ASTM standard, in order to determine their mechanical properties. The comparison between theoretical and experimental results were also performed and found to be in reasonable agreement. Other relevant parameters will also be discussed.

scholarly journals Review of Hybrid Fiber Based Composites with Nano Particles—Material Properties and Applications

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2088 ◽  
Author(s):  
Ayyappa Atmakuri ◽  
Arvydas Palevicius ◽  
Andrius Vilkauskas ◽  
Giedrius Janusas
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Material Properties ◽  
Chemical Treatment ◽  
Hybrid Composites ◽  
Natural Fibers ◽  
Nano Particles ◽  
Synthetic Fibers ◽  
Wide Range ◽  
Natural And Synthetic

The present review article provides an overview of the properties of various natural and synthetic fibers for the fabrication of pure natural composites and the combination of both natural/synthetic fibers-based hybrid composites, bio-based resins, various fabrication techniques, chemical and mechanical properties of fibers, the effect of chemical treatment and the influence of nanoparticles on the composite materials. Natural fibers are becoming more popular and attractive to researchers, with satisfactory results, due to their availability, ease of fabrication, cost-effectiveness, biodegradable nature and being environmentally friendly. Hybrid composites made up of two different natural fibers under the same matrix material are more popular than a combination of natural and synthetic fibers. Recent studies relevant to natural fiber hybrid composites have stated that, due to their biodegradability and the strength of individual fibers causing an impact on mechanical properties, flame retardancy and moisture absorption, natural fibers need an additional treatment like chemical treatment for the fibers to overcome those drawbacks and to enhance their better properties. The result of chemical treatment on composite material properties such as thermal, mechanical and moisture properties was studied. Researchers found that the positive influence on overall strength by placing the filler materials (nanoparticles) in the composite materials. Hybrid composites are one of the fields in polymer science that are attracting consideration for various lightweight applications in a wide range of industries such as automobile, construction, shipping, aviation, sports equipment, electronics, hardware and biomedical sectors.

MODELISATION DE L'INFLUENCE DU TRAITEMENT THERMIQUE SUR LES PROPRIETES MECANIQUES DES ALLIAGES ALUMINIUM-CUIVRE (Al-Cu)

2015 ◽  
Vol 10 (2) ◽  
pp. 2753-2761
Author(s):  
Saad El Madani ◽  
S. ELHAMZI ◽  
A. IBNLFASSI ◽  
L. ZERROUK ◽  
O. BEN LENDA ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Behavior ◽  
Solidification Process ◽  
Traitement Thermique ◽  
Homogenization Process ◽  
Fundamental Reason ◽  
Segregation Phenomenon ◽  
Proprietes Mecaniques ◽  
Cooling Velocity ◽  
Copper Effect

In order to master and improve the quality and properties of the final products, the major industrial challenge lies in the possibility of controlling the morphology, size of microstructures that reside within the molded pieces, as well as their defects; this is the fundamental reason according to which we are more and more interested in mastering the growth and germination of such alloys, as well as the developing structures, at the time of solidification process. The modeling reveals as a valuable aid in the mastery of the formation of such heterogeneousness: segregation cells that are incompatible with industrial requirements.   The whole work focuses upon the modeling of the segregation phenomenon of the four hypoeutectic alloys, Al1%Cu, Al2%Cu, Al3%Cu et Al4%Cu, as well as the copper effect upon certain mechanical properties of aluminum. Usually, the microstructure and mechanical behavior of such alloys as Al-Cu are directly influenced by some parameters such as composition, cooling velocity and homogenization process.

Aging of polymer composite materials under loading. (See Beginning in #10-2020)

2020 ◽  
pp. 2-12
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Polymer Composite ◽  
Polymer Composite Materials ◽  
Cyclic Loads ◽  
Reinforced Plastics ◽  
Water Exposure ◽  
Laboratory Conditions ◽  
Bending Loads ◽  
Moisture Conditions

A study review of aging polymer composite materials (PCM) under different heat-moisture conditions or water exposure with the sequential or parallel influence of static or cyclic loads in laboratory conditions is presented. The influence of tension and bending loads is compared. Conditions of the different load influence on parameters of carbon-reinforced plastics and glass-reinforced plastics are discussed. Equipment and units for climatic tests of PCM under loading are described. Simulation examples of indices of mechanical properties of PCM under the influence of environment and loads are shown.

Aging of polymer composite materials under loading

2020 ◽  
pp. 7-18
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Polymer Composite ◽  
Polymer Composite Materials ◽  
Cyclic Loads ◽  
Reinforced Plastics ◽  
Water Exposure ◽  
Laboratory Conditions ◽  
Bending Loads ◽  
Moisture Conditions

A study review of aging polymer composite materials (PCM) under different heat-moisture conditions or water exposure with the sequential or parallel influence of static or cyclic loads in laboratory conditions is presented. The influence of tension and bending loads is compared. Conditions of the different load influence on parameters of carbon-reinforced plastics and glass-reinforced plastics are discussed. Equipment and units for climatic tests of PCM under loading are described. Simulation examples of indices of mechanical properties of PCM under the influence of environment and loads are shown.

Sign in / Sign up

Export Citation Format

Share Document