Off-Axis Nonlinear Behavior of Hybrid GFRP/Al Laminates and Simulations by FEM

2007 ◽  
Vol 334-335 ◽  
pp. 69-72
Author(s):  
H. Takashima ◽  
Masamichi Kawai ◽  
Tetsuya Matsuda
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Nonlinear Deformation ◽  
Nonlinear Behavior ◽  
Tensile Loading ◽  
Tensile Behavior ◽  
Al Alloy ◽  
Inelastic Behavior ◽  
Unidirectional Glass ◽  
Hybrid Laminates

Off-axis tensile behavior of two grades of hybrid laminates, GLARE-2 and GLARE-3, made of unidirectional glass/epoxy laminae (GFRP) and aluminum (Al) alloy sheets is examined for various fiber orientations, and the differences in mechanical properties between the unidirectional and cross-ply hybrid laminates are quantified. The problem of accurately describing the nonlinear deformation of GLARE laminates under off-axis loading conditions is revisited, and the effect of local nonlinear deformation in the constituent GFRP layers on the overall inelastic behavior of GLARE laminates subjected to inclined tensile loading is elucidated by means of elastic-plastic finite element (FE) analyses.

Microstructure and Mechanical Properties of 6061 Aluminum Alloy Processed by Multi-Pass ECAE at Room Temperature

2010 ◽  
Vol 148-149 ◽  
pp. 579-585
Author(s):  
Hong Bo Dong ◽  
Gao Chao Wang
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Equal Channel Angular Extrusion ◽  
Constitutive Relations ◽  
Peak Load ◽  
Metal Flow ◽  
Al Alloy ◽  
Physical Test ◽  
Maximum Value ◽  
Microstructure And Mechanical Properties

In order to investigate effect of equal channel angular extrusion (ECAE) on microstructure and mechanical properties of annealed and solution-aged 6061 aluminum alloys, continuous ECAE process was carried out by physical test and finite element methods. The results show that the grains are refined with the increase of deformation; the metal flow lines cross and shear each other to form the clear boundaries. The solution-aged Al alloy does not show a monotonic increase in surface hardness with increasing passes as the annealed Al alloy does, but reaches a maximum value after the second pass and decreases successively during next two passes, which is closely related with the dislocation multiplication, recombination and annihilation. For the annealed and solution-aged Al-6061, the peak load reaches a maximum value in the second pass and fluctuates during the additional passes, which is caused by both material properties and frictions. The simulation shows that the peak load increases slowly with increasing passes, which is not in agreement with the measured value. Therefore the finite element mode using a single constitutive equation is not suitable for simulating multi-pass ECAE processing. The constitutive relations need to amend accordingly due to great changes of the mechanical properties between different passes.

Research on Mechanical Properties of FML

2011 ◽  
Vol 335-336 ◽  
pp. 281-284 ◽  
Author(s):  
Chang Hao Wang ◽  
Jing Tian ◽  
Xiang Lu
Keyword(s):  
Mechanical Properties ◽  
Finite Element Method ◽  
Finite Element ◽  
Composite Layer ◽  
Tensile Load ◽  
Element Model ◽  
Tensile Behavior ◽  
Aluminum Layer ◽  
The Finite Element Method ◽  
The Stability

According to the finite element method, this article has established the FML’s finite element model. By comparing to the test data and studying of the tensile behavior of FML, it has verified valid of the model. When the aluminum layer yields under the tensile load, the composite layer has the most tensile load. And the model has been developed to predict the stability influenced by the rib’s height.

scholarly journals Experimental Research and Simulation on the Mechanical Performance Degradation of Corroded Stud Shear Connectors

2019 ◽  
Vol 2019 ◽  
pp. 1-12
Author(s):  
Bing Wang ◽  
Xiaoling Liu ◽  
Jiantao Du
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Corrosion Rate ◽  
Mechanical Performance ◽  
Volume Fraction ◽  
Tensile Tests ◽  
Tensile Behavior ◽  
Uniaxial Tensile ◽  
Element Analysis ◽  
Gtn Model

Electrochemical accelerated corrosion and tensile tests were conducted on six series of 30 stud specimens in this study to assess the various mechanical properties in corroded stud connectors. The results indicate that there is a gradual decline in mechanical properties (e.g., yield strength, ultimate strength, and plasticity) as stud corrosion rate increases. Degradation equations for these parameters were established via fitting analysis on the test data. A Gurson–Tvergaard–Needleman (GTN) constitutive model describing the tensile behavior of corroded studs was established based on mesodamage mechanics and finite element analysis. In the GTN model, the corrosion rate equals the original void volume fraction; the trial-and-error method was adopted to determine the relationship between the corrosion rate and material failure parameters. The finite element simulation results are in good agreement with the experimental results. The GTN model accurately simulates the uniaxial tensile behavior of the corroded stud.

Material Characterization of Hybrid Composite: Experimental Using Strain Gauge/DIC with Finite Element Modelling Macro/Micro Scale

2017 ◽  
Vol 740 ◽  
pp. 31-40 ◽  
Author(s):  
Ahmad Fuad Ab Ghani ◽  
Jamaluddin Mahmud
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Strain Gauge ◽  
Hybrid Composite ◽  
Finite Element Modelling ◽  
Tensile Loading ◽  
Image Correlation ◽  
Uniaxial Tensile ◽  
Element Modelling ◽  
Macro Scale

The study presents the multi methods of determining mechanical properties and mechanical characterization under tensile loading of hybrid composite in the form of experimental technique involving measurement of strain using strain gauge and digital image correlation (DIC) technique utilizing open source platform Ncorr to compute the strain on surface of hybrid composite. The method of micro mechanical modelling using Finite Element Modelling (FEM) in the mode of representation volume element (RVE) method and macro scale FEM using commercial software Ansys have been performed to compute the modulus of elasticity in direction of uniaxial tensile loading. The four methods then compared which yields very consistent results with each other. It is observed that all four methods are reliable in determining mechanical properties of unidirectional single composite as well as hybrid composite. The experimental involved the use of ASTM D3039 standard tensile test for hybrid composite and strain are measured using strain gauges and DIC.

A Study on Mechanical and Fatigue Properties of a Stainless Steel

2015 ◽  
Vol 1095 ◽  
pp. 79-82
Author(s):  
Jun Tian Zhao ◽  
Yan Rui Zuo ◽  
Wei Ping Zhao
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Stainless Steel ◽  
Fatigue Crack ◽  
Room Temperature ◽  
Tensile Tests ◽  
Tensile Behavior ◽  
Fatigue Properties ◽  
Finite Element Software

With times of tensile tests, the tensile behavior of a kind of stainless steel at room temperature was determined. According to the results of tensile tests, some parameters of mechanical properties of the stainless steel can be obtained. Fatigue crack expansion of COD stainless steel specimens at room temperature can be simulated with the finite element software extensions.

Tensile Behavior of Woven Hybrids Composites

2010 ◽  
Author(s):  
E. Sevkat ◽  
B. M. Liaw ◽  
F. Delale
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Finite Element ◽  
Hybrid Composites ◽  
Testing Machine ◽  
Tensile Behavior ◽  
Resin Composites ◽  
Reinforced Composites ◽  
Universal Testing ◽  
Graphite Fibers

This paper presents an experimental study to investigate the tensile behavior of plain-weave hybrid S2 glass-IM7 graphite fibers/toughened SC-79 resin (cured at 177°C) composite strips. The tests were conducted on hybrid S2 glass-IM7 graphite fibers/toughened SC-79 resin and non-hybrid S2 glass-fiber/toughened SC-79 resin composites strips using a 22-kip MTS servo hydraulic universal testing machine. To use in Finite Element Modeling, the mechanical properties of these composite specimens with four lay-up sequences were determined. It was observed that the hybrid composites mechanical properties were somewhere between those of glass and graphite reinforced composites.

Characterization of Submicron Mechanical Properties of Al-Alloy Foam Using Nanoindentation Technique

2005 ◽  
Vol 475-479 ◽  
pp. 4199-4202 ◽  
Author(s):  
Am Kee Kim ◽  
Md Anwarul Hasan ◽  
Hak Joo Lee ◽  
Seong Seock Cho
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Cell Wall ◽  
Foam Cell ◽  
Strain Curve ◽  
Wall Material ◽  
Nanoindentation Test ◽  
Al Alloy ◽  
Cell Wall Material ◽  
Unloading Stiffness

Nanoindentation test has been performed to characterize the mechanical properties of aluminium alloy foam cell wall. Two of the mechanical properties: hardness and Young’s modulus of cell wall material were evaluated using the stiffness of contact during both loading and unloading. Properties obtained from unloading stiffness were in better agreement with the conventional test result than those obtained from loading stiffness. The finite element analysis using nonlinear finite element code ABAQUS was performed to characterize the yield strength and the stress-strain curve of the cell wall material of the foam. Properties of foam cell wall material were found to be substantially different from the properties of the material before foaming. The methodology used in this paper can be effectively used to characterize the mechanical properties of cell wall of any cellular material.

ffect of Na2WO4 in electrolyte on mechanical properties of oxide layer on Al alloy via plasma electrolytic oxidation

2015 ◽  
Vol 53 (8) ◽  
pp. 535-540 ◽  
Author(s):  
Young Gun Ko ◽  
Dong Hyuk Shin ◽  
Hae Woong Yang ◽  
Yeon Sung Kim ◽  
Joo Hyun Park ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Oxide Layer ◽  
Plasma Electrolytic Oxidation ◽  
Al Alloy ◽  
Electrolytic Oxidation ◽  
Plasma Electrolytic

Effect of aluminum content on structure, transport and mechanical properties of Sn-Zn eutectic lead free solder alloy rapidly solidified from melt.

2015 ◽  
Vol 10 (1) ◽  
pp. 2641-2648
Author(s):  
Rizk Mostafa Shalaby ◽  
Mohamed Munther ◽  
Abu-Bakr Al-Bidawi ◽  
Mustafa Kamal
Keyword(s):  
Mechanical Properties ◽  
Melting Point ◽  
Lead Free ◽  
Al Alloy ◽  
Lead Free Solder ◽  
Pronounced Increase ◽  
Mass Unit ◽  
Size Refinement ◽  
Free Solder ◽  
Lead Free Solders

The greatest advantage of Sn-Zn eutectic is its low melting point (198 oC) which is close to the melting point. of Sn-Pb eutectic solder (183 oC), as well as its low price per mass unit compared with Sn-Ag and Sn-Ag-Cu solders. In this paper, the effect of 0.0, 1.0, 2.0, 3.0, 4.0, and 5.0 wt. % Al as ternary additions on melting temperature, microstructure, microhardness and mechanical properties of the Sn-9Zn lead-free solders were investigated. It is shown that the alloying additions of Al at 4 wt. % to the Sn-Zn binary system lead to lower of the melting point to 195.72 ˚C.  From x-ray diffraction analysis, an aluminium phase, designated α-Al is detected for 4 and 5 wt. % Al compositions. The formation of an aluminium phase causes a pronounced increase in the electrical resistivity and microhardness. The ternary Sn-9Zn-2 wt.%Al exhibits micro hardness superior to Sn-9Zn binary alloy. The better Vickers hardness and melting points of the ternary alloy is attributed to solid solution effect, grain size refinement and precipitation of Al and Zn in the Sn matrix.  The Sn-9%Zn-4%Al alloy is a lead-free solder designed for possible drop-in replacement of Pb-Sn solders.  

Influence of ageing treatment on microstructure, mechanical properties and adhesive wear behaviour of 6063 aluminium alloy

2014 ◽  
Vol 66 (4) ◽  
pp. 520-524 ◽  
Author(s):  
Serkan Büyükdoğan ◽  
Süleyman Gündüz ◽  
Mustafa Türkmen
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
High Speed ◽  
Al Alloys ◽  
Wear Behaviour ◽  
Al Alloy ◽  
Strain Ageing ◽  
Content Type ◽  
Static Strain ◽  
Structural Applications

Purpose – The paper aims to provide new observations about static strain ageing in aluminium (Al) alloys which are widely used in structural applications. Design/methodology/approach – The present work aims to provide theoretical and practical information to industries or researchers who may be interested in the effect of static strain ageing on mechanical properties of Al alloys. The data are sorted into the following sections: introduction, materials and experimental procedure, results and discussion and conclusions. Findings – Tensile strength, proof strength (0.2 per cent) and percentage elongation measurement were used to investigate the effect of strain ageing on the mechanical properties. Wear tests were performed by sliding the pin specimens, which were prepared from as-received, solution heat-treated, deformed and undeformed specimens after ageing, on high-speed tool steel (64 HRC). It is concluded that the variations in ageing time improved the strength and wear resistance of the 6063 Al alloy; however, a plastically deformed solution-treated alloy has higher strength and wear resistance than undeformed specimens for different ageing times at 180°C. Practical implications – A very useful source of information for industries using or planning to produce Al alloys. Originality/value – This paper fulfils an identified resource need and offers practical help to the industries.

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