Numerical Simulation on Mechanical Properties of SiC/Al Co-Continuous Composites

2011 ◽  
Vol 213 ◽  
pp. 186-190 ◽  
Author(s):  
Ming Juan Zhao ◽  
Na Li ◽  
Long Zhi Zhao ◽  
Xiao Lan Zhang

Mechanical properties of the co-continuous SiC/Al composites were simulated using the ANSYS software in this paper, and Kelvin model was adopted as SiC structure. The models of various SiC contents were calculated for composites, the influences of SiC volume fraction on the interface were analyzed. Compared with the particle reinforced composites, the influences of SiC structure on the interface and strength were investigated. The results showed that the SiC volume fraction has a certain effect on the interface of composites, the incoordination of deformation of SiC and Al causes the greater stress concentration with SiC volume fraction decreases, so that interface occurs the debonding. Compared the simulation results of co-continuous composites and particle reinforced composites, two stress-distance curves show that the stress decreases with the distance from the interface increases, and two stress-strain curves prove that the co-continuous composites have higher the yield strength and the deforming resistance.

Author(s):  
Rizal Hanifi ◽  
Gebyar Dewangga ◽  
Kardiman Kasiadi ◽  
Eri Widianto

Research has been carried out on the analysis of mechanical properties and simulation of composite failure of oil palm midrib fiber polypropylene matrix as car bumpers. This research is expected to provide information on the results of testing the mechanical properties and physical properties and to find out the results of failure simulation in stress analysis based on static test using Inventor Professional 2015 software. Composite boards are made using the hot press method with three variations volume fraction is 20% fiber: 80% matrix, 30% fiber: 70% matrix and 40% fiber: 60% matrix. Characterization of composite physical properties in the form of density, swelling, and water uptake while mechanical properties in the form of tensile testing. Composite physical test results showed that composites made according to JIS A5908 (2003) composite tensile test results showed that the maximum tensile strength obtained at the volume fraction of 40% fiber: 60% matrix with a value of 21.106 MPa, followed by a decrease in tensile strength in volume fraction 30% fiber: 70% matrix and 20% fiber: 80% matrix. Increased tensile strength due to direct orientation of fibers and the addition of fiber composition. Composites are still worth making bumper because the value of tensile strength is no less than the standard bumper which is 8,09 MPa. Next, failure simulation results based on a static test uses three variations of speed, namely 60 km/hr, 80 km/hr and 100 km/hr. The failure simulation results based on the static test of the three speed variations show the value of the von misses stress below the yield strength of the material, then the displacement value that occurs is small and the value of the safety factor produced is above one. From the results of the analysis of composite testing, it shows that the composite has the potential to be a car bumper material.Telah dilakukan penelitian tentang analisis sifat mekanik dan simulasi kegagalan komposit serat pelepah kelapa sawit matriks polypropylene sebagai bumper mobil. Penelitian ini diharapkan dapat memberi informasi hasil pengujian sifat mekanik dan sifat fisis serta mengetahui hasil simulasi kegagalan dalam stress analysis berdasarkan static test menggunakan software Inventor Professional 2015. Papan komposit dibuat menggunakan metode hot press dengan tiga variasi fraksi volume yaitu 20% serat: 80% matriks, 30% serat: 70% matriks dan 40% serat: 60% matriks. Karakterisasi sifat fisis komposit berupa densitas, swelling, dan serapan air sedangkan sifat mekanik berupa pengujian tarik. Hasil pengujian fisis komposit menunjukkan bahwa komposit yang dibuat sesuai dengan klasifikasi JIS A5908. Hasil pengujian tarik komposit menunjukkan bahwa nilai kekuatan tarik maksimal yang paling besar diperoleh pada fraksi volume 40% serat: 60% matriks dengan nilai 21,106 MPa, diikuti penurunan kekuatan tarik pada fraksi volume 30% serat: 70% matriks dan 20% serat: 80% matriks. Meningkatnya kekuatan tarik dikarenakan orientasi serat searah dan penambahan komposisi serat. Komposit masih layak dibuat bumper karena nilai kekuatan tariknya tidak kurang dari standar bumper yaitu 8,09 MPa. Selanjunya, hasil simulasi kegagalan berdasarkan static test menggunakan tiga variasi kecepatan yaitu 60 km/jam, 80 km/jam dan 100 km/jam. Hasil simulasi kegagalan berdasarkan static test dari ketiga variasi kecepatan tersebut menunjukkan nilai von misses stress dibawah nilai yield strength yang dimiliki material, kemudian nilai displacement yang terjadi kecil serta nilai safety factor yang dihasilkan yaitu di atas satu. Dari hasil analisis pengujian komposit tersebut menunjukkan bahwa komposit berpotensi sebagai material bumper mobil


2013 ◽  
Vol 561 ◽  
pp. 130-134
Author(s):  
Xiao Guang Zhang ◽  
Ying Jie Ji ◽  
Shi Gang Wang ◽  
Xiao Li

The overall thermal properties of particle reinforced composites are of primary importance for practical applications. Effect of random spatial distribution of sphere particles on the thermal conductivity of composites was numerically studied by ANSYS Workbench Steady-State Thermal analysis module. MATLAB procedure is used to achieve random distribution of particles in composites and to generate a representative volume element (RVE) model. The simulation results indicate that, at the same volume fraction, the random distribution has higher thermal conductivity than the uniform distribution; effect of particles’ spatial distribution on thermal conductivity is greater than volume fraction especially when the volume fraction is between 15% and 35%.


2015 ◽  
Vol 741 ◽  
pp. 536-540
Author(s):  
Xiao Zhi Qiu ◽  
Yan Ming Zhao ◽  
Bao Hua Huang ◽  
Wei Xu

Based on the analysis of indirect air cooling system, a numerical simulation model of indirect air cooling system was constructed by ANSYS software. According to the different wind speed condition, the temperature characteristic of indirect air cooling system was analyzed. The simulation results show that with the increase of wind speed, the ventilation and heat release of the indirect air cooling system change greatly. It provides a theoretical basis for the design of the wind-proof device of indirect air cooling system.


2007 ◽  
Vol 558-559 ◽  
pp. 1201-1206 ◽  
Author(s):  
Mihaela Teodorescu ◽  
Patrice Lasne ◽  
Roland E. Logé

The present work concerns the simulation of metallurgical evolutions in 3D multi-pass forming processes. In this context, the analyzed problem is twofold. One point refers to the management of the microstructure evolution during each pass or each inter-pass period and the other point concerns the management of the multi-pass aspects (different grain categories, data structure). In this framework, a model is developed and deals with both aspects. The model considers the microstructure as a composite made of a given (discretized) number of phases which have their own specific properties. The grain size distribution and the recrystallized volume fraction distribution of the different phases evolve continuously during a pass or inter-pass period. With this approach it is possible to deal with the heterogeneity of the microstructure and its evolution in multi-pass conditions. Both dynamic and static recrystallization phenomena are taken into account, with typical Avrami-type equations. The present model is implemented in the Finite Element code FORGE2005®. 3D numerical simulation results for a multi-pass process are presented.


1981 ◽  
Vol 12 ◽  
Author(s):  
A. Kolb-Telieps ◽  
B.L. Mordike ◽  
M. Mrowiec

ABSTRACTCu-Nb composite wires were produced from powder, electrolytically coated with tin and annealed to convert the Nb fibres to Nb 3Sn. The content was varied between 10 wt % and 40 wt %. The superconducting properties of the wires were determined. The mechanical properties, tensile strength, yield strength and ductility were measured as a function of volume fraction and deformation over a wide temperature range. The results are compared with those for wires produced by different techniques.


2007 ◽  
Vol 127 ◽  
pp. 259-264
Author(s):  
Hong Yuan Fang ◽  
Cheng Iei Fan

Numerical simulation method is employed in the article to analyze the stress field of thick 7B04 aluminum alloy board during manufacturing procedure of solution treatment, calendaring and stretching. The simulation results show that the surface of the board endures compressive stress while the core segment endures tensile stress, and the distribution of the stress is very inhomogeneous. The calendaring procedure helps to decrease the stress and redistribute the stress uniformly, but it also leads to stress concentration at the two ends of the board, which engenders bad influence on the subsequent processing. The board deforms plastically when being stretched, thus the stress decreases greatly and is redistributed uniformly.


2011 ◽  
Vol 695 ◽  
pp. 271-274
Author(s):  
Xiao Yong Zhang ◽  
Hui Lin Gao ◽  
Xue Qin Zhang ◽  
Yan Yang

The pipeline steel with excellent deformability with ferrite and bainite dual-phase microstructure are obtained by inter-critically accelerating cooling method, aiming to get good deformation capability of avoiding failure from the geological disasters such as landslides and earthquake. The influence of volume fraction of bainite on the mechanical properties of dual-phase pipeline steels was investigated by means of microscopic analysis method and mechanical properties testing. The results indicated that both yield strength and ultimate tensile strength of the steels increase almost linearly with the increasing volume fraction of bainite, while ductility, work hardening exponent and impact absorption energy decrease. When the volume fraction of bainite is about 50%, the yield strength, the yield strength/tensile strength ratio (Y/T), work hardening exponent, uniform elongation and impact absorption energy of X80 pipeline steels with excellent deformability is 665MPa, 0.8, 0.12, 8% and 245J respectively.


Author(s):  
Vahid Tajeddini ◽  
Chien-hong Lin ◽  
Anastasia Muliana ◽  
Martin Lévesque

This study introduces a micromechanical model that incorporates detailed microstructures for analyzing the effective electro-mechanical properties, such as piezoelectric and permittivity constants as well as elastic moduli, of piezoelectric particle reinforced composites. The studied composites consist of polarized spherical piezoelectric particles dispersed into a continuous and elastic polymeric matrix. A micromechanical model generated using three-dimensional (3D) continuum elements within a finite element (FE) framework. For each volume fraction (VF) of particles, realization with different particle sizes and arrangements were generated in order to represent microstructures of a particle composite. We examined the effects of microstructural morphologies, such as particle sizes and distributions, and particle volume fractions on the overall effective electro-mechanical properties of the active composites. The overall electro-mechanical properties determined from the present micromechanical model were compared to those generated using the Mori-Tanaka, self-consistent, and simplified unit-cell micromechanical models.


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