Thermal and mechanical properties of infiltrated W/CuCrZr composite materials for functionally graded heat sink application

2013 ◽  
Vol 438 (1-3) ◽  
pp. 1-6 ◽  
Author(s):  
J.-H. You ◽  
A. Brendel ◽  
S. Nawka ◽  
T. Schubert ◽  
B. Kieback
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Heat Sink ◽  
Functionally Graded ◽  
Thermal And Mechanical Properties

Effects of ionic liquid types on the tribological, mechanical, and thermal properties of ionic liquid modified graphene/polyimide shape memory composites

2021 ◽  
pp. 095400832199676
Author(s):  
Yuting Ouyang ◽  
Qiu Zhang ◽  
Xiukun Liu ◽  
Ruan Hong ◽  
Xu Xu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Ionic Liquid ◽  
Composite Materials ◽  
Shape Memory ◽  
Recovery Rate ◽  
Shape Recovery ◽  
Graphene Nanosheets ◽  
Mechanical And Thermal Properties ◽  
Thermal And Mechanical Properties ◽  
Modified Graphene

Different ionic liquid modified graphene nanosheets (IG) were induced into polyimide (PI) to improve the tribological, thermal, and mechanical properties of shape memory IG/PI composites. The results demonstrated that when using 1-aminoethyl-3-methylimidazole bromide to modify graphene nanosheets (IG-1), the laser-driven shape recovery rate of IG-1/PI composites (IGPI-1) reached 73.02%, which was 49.36% higher than that of pure PI. In addition, the IGPI-1 composite materials reached the maximum shape recovery rate within 15 s. Additionally, under dry sliding, the addition of IG can significantly improve the tribological properties of composite materials. IGPI-1 exhibited the best self-lubricating properties. Compared with pure PI, the friction coefficient (0.19) and wear rate (2.62 × 10–5) mm3/Nm) were reduced by 44.1% and 24.2%, respectively, and the T10% of IGPI-1 increased by 32.2°C. The Tg of IGPI-1 reached 256.5°C, which was 8.4°C higher than that of pure PI. In addition, the tensile strength and modulus of IGPI-1 reached 82.3 MPa and 1.18 GPa, which were significantly increased by 33.6% and 29.8%, respectively, compared with pure PI. We hope that this work will be helpful for the preparation of shape memory materials with excellent tribological, thermal, and mechanical properties.

Thermal stress analysis of in-plane two-directional functionally graded plates subjected to in-plane edge heat fluxes

2016 ◽  
Vol 232 (8) ◽  
pp. 693-716
Author(s):  
MK Apalak ◽  
MD Demirbas
Keyword(s):  
Mechanical Properties ◽  
Thermal Stress ◽  
Functionally Graded ◽  
Heat Fluxes ◽  
Material Composition ◽  
Stress Distributions ◽  
Thermal And Mechanical Properties ◽  
Functionally Graded Plates ◽  
Spatial Derivatives ◽  
Derivatives Of

This study investigates the thermal stress and deformation states of bi-directional functionally graded clamped plates subjected to constant in-plane heat fluxes along two ceramic edges. The material properties of the functionally graded plates were assumed to vary with a power law along two in-plane directions not through the plate thickness direction. The spatial derivatives of thermal and mechanical properties of the material composition were considered, and the effects of the bi-directional composition variations and spatial derivative terms on the displacement, strain and stress distributions were also investigated. The heat conduction and Navier equations describing the two-dimensional thermo-elastic problem were discretized using finite-difference method, and the set of linear equations were solved using the pseudo singular value method. The compositional gradient exponents and the spatial derivatives of thermal and mechanical properties of the material composition were observed to play an important role especially on the heat transfer durations, the displacement and strain distributions, but had a minor effect on the temperature and stress distributions.

scholarly journals Enhancing thermal and mechanical properties of polypropylene using masterbatches of nanoclay and nano-CaCO3: A review

2018 ◽  
Vol 3 (1) ◽  
pp. 19-26
Author(s):  
Achmad Chafidz
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Polymer Nanocomposites ◽  
Review Paper ◽  
Thermal And Mechanical Properties ◽  
Structure Property ◽  
Melt Compounding ◽  
Structure Property Relationships ◽  
Composites Materials ◽  
Macro Scale

Polymer nanocomposites (PNCs) can be considered as promising relatively new types of composite materials. PNCs give opportunity to develop new composites materials with different structure-property relationships compared to their conventional micro/macro scale composites. Polyolefin based nanocomposites nowadays become more important, because this type of composites has been largely used in various industries. For example, polypropylene based nanocomposites have been widely used in automobile – related industries to replace their conventional composites. This review paper will focus on the polypropylene based nanocomposites prepared using masterbatches of nanoclay and nano-CaCO3 via melt compounding method. The thermal and mechanical properties of such nanocomposites were also discussed.

scholarly journals Protein and Polysaccharide-Based Magnetic Composite Materials for Medical Applications

2019 ◽  
Vol 21 (1) ◽  
pp. 186 ◽  
Author(s):  
Elizabeth J. Bealer ◽  
Kyril Kavetsky ◽  
Sierra Dutko ◽  
Samuel Lofland ◽  
Xiao Hu
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Amino Acid ◽  
Biomedical Applications ◽  
Amino Acid Sequences ◽  
Medical Applications ◽  
Magnetic Composite ◽  
Thermal And Mechanical Properties ◽  
Magnetic Elements ◽  
Materials Used

The combination of protein and polysaccharides with magnetic materials has been implemented in biomedical applications for decades. Proteins such as silk, collagen, and elastin and polysaccharides such as chitosan, cellulose, and alginate have been heavily used in composite biomaterials. The wide diversity in the structure of the materials including their primary monomer/amino acid sequences allow for tunable properties. Various types of these composites are highly regarded due to their biocompatible, thermal, and mechanical properties while retaining their biological characteristics. This review provides information on protein and polysaccharide materials combined with magnetic elements in the biomedical space showcasing the materials used, fabrication methods, and their subsequent applications in biomedical research.

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.

A Micromechanical Approach for Analyzing Thermo-Mechanical Responses of Functionally Graded Materials

2007 ◽  
Author(s):  
Anastasia Muliana ◽  
Kamran Khan
Keyword(s):  
Mechanical Properties ◽  
Functionally Graded Materials ◽  
Homogeneous Medium ◽  
Thermomechanical Properties ◽  
Functionally Graded ◽  
Analytical Models ◽  
Thermal And Mechanical Properties ◽  
Stress Strain ◽  
Graded Materials ◽  
Mechanical Coupling

Functionally graded materials (FGMs) consist of continuously or discretely changing thermal and mechanical properties in the graded directions. The FGMs are often used for applications that involve high temperature gradients. Under this condition, the thermal and mechanical properties of materials can strongly depend upon the temperatures, which create a thermo-mechanical coupling. Available micromodels of FGMs have focused on obtaining the through-thickness mechanical properties [2,4,7]. This study develops an integrated micromechanical and structural framework for analyzing coupled heat conduction and deformations in the FGMs. A through-thickness material variation is represented with piecewise homogeneous media. Average thermomechanical properties in each homogeneous medium are obtained using a micromodel of particle reinforced composites, whose constituents’ properties can change with temperatures and/or stresses. Sequentially coupled heat transfer and displacement analyses are performed, which allows analyzing stress/strain with temperature dependent mechanical properties, but the temperature field is obtained without knowledge of stress/strain responses. Parametric studies are performed to determine the effects of through thickness material variation and constituent properties on the overall performance of the FGM. Available experimental data and analytical models are used for comparisons.

Thermal and mechanical properties of SEBS-g-MA based inorganic composite materials

2006 ◽  
Vol 42 (1) ◽  
pp. 93-100 ◽  
Author(s):  
Sonia Zulfiqar ◽  
Zahoor Ahmad ◽  
Muhammad Ishaq ◽  
Shaukat Saeed ◽  
Muhammad Ilyas Sarwar
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Thermal And Mechanical Properties ◽  
Inorganic Composite
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