Advanced analysis of flexural test results of sealant for solid oxide cells

2021 ◽  
Author(s):  
Masood Fakouri Hasanabadi ◽  
Amir Hossein Kokabi ◽  
Mohammad Ali Faghihi‐Sani ◽  
Hamid Abdoli ◽  
Jürgen Malzbender ◽  
...  
Keyword(s):  
Solid Oxide ◽  
Test Results ◽  
Flexural Test ◽  
Advanced Analysis

scholarly journals Flexure Performance of Externally Bonded CFRP Plates-Strengthened Reinforced Concrete Members

2020 ◽  
Vol 2020 ◽  
pp. 1-15
Author(s):  
Xin Yuan ◽  
Chaoyu Zhu ◽  
Wei Zheng ◽  
Jiangbei Hu ◽  
Baijian Tang
Keyword(s):  
Failure Modes ◽  
Calculation Model ◽  
Flexural Behavior ◽  
Test Results ◽  
Flexural Test ◽  
Concrete Members ◽  
Cfrp Plate ◽  
Matlab Program ◽  
Externally Bonded ◽  
The Relationship

This paper investigates the flexural behavior of CFRP plate-strengthened concrete structures. Specimens of the CFRP plate-reinforced beam were designed and tested by the four-point flexural test. The load-deflection relationship, failure modes, and crack propagation were analyzed. The results showed that the postcracking stiffness and bearing capacity of the test beams can be improved by the additional anchoring measures for CFRP strengthening. The relationship between flexural moment and curvature was analyzed by introducing a MATLAB program. The calculation model between curvature, flexural moment, and stiffness was derived for the CFRP plate-strengthened structure. The recommended calculation model was applied in the analysis of deflection, and the theoretical values were compared with the test results.

Manufacturing and Mechanical Property Evaluations of PLA/Carbon Fiber/Glass Fiber Composites

2015 ◽  
Vol 749 ◽  
pp. 261-264 ◽  
Author(s):  
Jia Horng Lin ◽  
Chien Lin Huang ◽  
Chih Kuang Chen ◽  
Jo Mei Liao ◽  
Ching Wen Lou
Keyword(s):  
Carbon Fiber ◽  
Glass Fiber ◽  
Impact Test ◽  
Fiber Composites ◽  
Production Costs ◽  
Test Results ◽  
Flexural Test ◽  
Fiber Glass ◽  
Glass Fiber Composites ◽  
Scanning Electron

This study uses carbon fiber (CF) and glass fiber (GF) as reinforcement for polylactic acid (PLA) fiber, and their mixtures are melt-blended into PLA/CF/GF composites. Mechanical properties of the composites are evaluated by applying a tensile test, a flexural test, and an impact test, and the dispersion of fibers is observed by using a scanning electron microscopy (SEM). The test results show that the increasing content of CF results in a greater strength in the composites while the increasing content of GF provides the composites with greater modulus. The combination of both CF and GF contributes to a certain level of mechanical strength and also decreases the production costs for the composites.

scholarly journals Research on Advanced Analysis Method of Semi-Rigid Steel Frames

2015 ◽  
Vol 9 (1) ◽  
pp. 12-16
Author(s):  
Liu Wei ◽  
Shu Ganping ◽  
Chan Siulai
Keyword(s):  
Stiffness Matrix ◽  
Mechanical Performance ◽  
Plastic Hinge ◽  
Geometrical Nonlinearity ◽  
Steel Frames ◽  
Test Results ◽  
Analysis Method ◽  
Validity And Reliability ◽  
Element Stiffness Matrix ◽  
Advanced Analysis

The advanced analysis method used to analyze semi-rigid steel frames is introduced, and the method could take account of many factors influencing structure mechanical performance. These factors include: initial imperfect mode of structure and members, geometrical nonlinearity (P-∆, P-δ effects), material nonlinearity and semi-rigid connections. The Curved Stability Function (CSF) element is built to take account of initial imperfect state, semi-rigid connections and plastic hinge, and derivatives of the second-order element stiffness matrix to extend the spatial element stiffness matrix. The nonlinearity behavior of semi-rigid connections and plastic hinge are simulated by the spring element. Judgment criteria of plastic hinge and spring stiffness values are determined, as well as of the structure failure. The three semirigid steel frames are directly analyzed by the program named NIDA, and the results of NIDA are comparatively analyzed with test results. It is indicated that the results of NIDA are better compared to the test results, verifying validity and reliability of the advanced analysis method used to analyze semi-rigid steel frames.

Flexural Toughness of Sprayable Strain-Hardening Cement Composite (SHCC) for Seismic Retrofit of Non-Ductile Reinforced Concrete Frames

2013 ◽  
Vol 658 ◽  
pp. 34-37 ◽  
Author(s):  
Seung Ju Han ◽  
Hyun Do Yun
Keyword(s):  
Reinforced Concrete ◽  
Strain Hardening ◽  
Strong Influence ◽  
Volume Fraction ◽  
Cement Composite ◽  
Flexural Behavior ◽  
Test Results ◽  
Flexural Test ◽  
Concrete Frames ◽  
Flexural Toughness

This experimental study investigates the flexural behavior and toughness of sprayable strain-hardening cement composite (SHCC) developed to retrofit seismically reinforced concrete structures with non-ductile reinforcement details. Three SHCC mixtures with specified compressive strength of 50 MPa are mixed and tested. All SHCC mixes with different dosage and combination of admixtures such as superplasticizer and powder admixture were reinforced with 2.2 % polyvinyl alcohol (PVA) fibers at the volume fraction. This paper focuses on the flexural toughness based on the flexural test results for 100 x 100 x 400 mm prisms. The flexural toughness is evaluated in accordance with ASTM C 1018. The results indicated that less than 2.5 % dosage of hybrid superplasticizer and powder admixtures respectively provides excellent sprayability and flexural behavior of SHCC mixed in this study. A strong influence of hybrid superplasticizer and powder admixture on the flexural toughness of SHCC mixes was observed.

scholarly journals Characterisation and Properties of Recycled Craft Shell Powder/Epoxy Composites

2019 ◽  
Vol 8 (4) ◽  
pp. 11766-11770
Keyword(s):  
Impact Test ◽  
Volume Fraction ◽  
Test Results ◽  
Flexural Test ◽  
Sem Images ◽  
The Matrix ◽  
Filler Reinforcement ◽  
Particulate Filler ◽  
Test Impact ◽  
Shell Powder

The properties of polymer composites can be tailor made by incorporating suitable filler and fiber as a reinforcement in the polymer matrix. In this work, craft shell powder had been used a natural filler in the Epoxy resin and the composites were prepared at various proportions(4%, 8%, 12%, 16% and 20%) of craft shell powder using hand layup method. The specimens were subjected to various mechanical testing such as tensile test, flexural test, impact test as per ASTM standards. The test results revealed that particulate filler reinforcement resulted in marginal increase in tensile strength but the properties decrease at higher volume fraction of the fiber. But, the values of mechanical moduli had shown better improvement due to filler addition. SEM images were taken to analyse the interfacial bonding between the matrix and filler particles.

scholarly journals Experimental Study on the Mechanical Properties of the Fiber Cement Mortar Containing Polyurethane

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Xijun Zhang ◽  
Hongyuan Fang ◽  
Mingrui Du ◽  
Mingsheng Shi ◽  
Chao Zhang
Keyword(s):  
Mechanical Properties ◽  
Cement Mortar ◽  
High Strength ◽  
Sem Analysis ◽  
Test Results ◽  
Flexural Test ◽  
Compressive Test ◽  
Bending Resistance ◽  
Properties Of Materials ◽  
Pva Fiber

Polymer is a kind of high molecular elastic material. The polymer cement mortar composite material formed by mixing it with cement mortar has the advantages of light weight, high strength, and good durability compared with traditional mortar materials. The effect of polyurethane polymer content on mechanical properties and microstructure of polyvinyl alcohol (PVA) fiber cement mortar was studied by compressive test, flexural test, and SEM analysis. The test results show that as the content of polyurethane increases, the compressive strength gradually decreases, and the flexural strength gradually increases. The addition of polyurethane helps to optimize the microstructure of PVA mortar, improve the compactness of the material, and enhance the bending resistance of the mortar. The mechanical properties of materials obtained from the experiment can provide references for engineering applications.

Interaction Factors Effecting on Gas Heat of Sectional Straw Gasifier

2014 ◽  
Vol 926-930 ◽  
pp. 1374-1377
Author(s):  
Bu Gong Sun ◽  
Jian Ming Wu ◽  
Lin Rong Shi ◽  
Wei Sun
Keyword(s):  
Water Vapor ◽  
Moisture Content ◽  
Regression Model ◽  
Interaction Effect ◽  
Test Results ◽  
Analysis Method ◽  
Factors Influencing ◽  
Interaction Factors ◽  
Advanced Analysis ◽  
Significant Factors

Based on the analysis of the sectional straw gasifier and the basis of test results, according to the experiment results and advanced analysis method the test results of regression model was established. According to the regression model, double factors significant characteristics of gas heat was analyzed, the double of significant factors on the influence of gas heat was researched. The results show that the gas and material moisture content, gas and water vapor content of interaction effect is remarkable. Analysis on the double factors influencing gas heat for the improvement of sectional straw gasifier and finalize the design provided the necessary reference basis.

scholarly journals Kekuatan Lentur Papan Komposit Hasil Kombinasi Perentase Ijuk dan Cangkang Telur Ayam

2019 ◽  
Vol 2 (02) ◽  
pp. 7-10
Author(s):  
Muhammad Mahdi ◽  
Syamsul Hadi
Keyword(s):  
Polyester Resin ◽  
Analysis Data ◽  
Test Results ◽  
Flexural Test ◽  
Natural Materials ◽  
Palm Fiber ◽  
Weight Percentage ◽  
Chicken Egg ◽  
Chicken Eggshell ◽  
Eggshell Waste

       The production of chicken egg is increasing every year, causing a lot of eggshell waste and abundance of natural materials of palm fiber (ijuk), but not used properly. The purpose of the research is to get the weight percentage variation of composite palm fiber and chicken eggshell with resin as a matrix. The method of this research include: the making of composite specimen from polyester resin Yukalac 157 BQTN-EX with added palm fiber and eggshell as a filler with sizes according to ASTM-D 7264, testing the composite specimens and Mahogany wood, and to analysis data from the test results is processed using Two-Way Anova to determine the effect of the percentage of palm fiber and chicken eggshell weights on flexure strenght composite. The result of flexural test show that the lowest yield strenght is on compotition of 4% palm fiber and 1% eggshell worth 11,3 MPa, and the highest yield strenght is on compotition of 9% palm fiber and 4% eggshell worth 87,7 MPa.

Thermal Gradient Induced Current Recirculation on Load Change in Solid Oxide Fuel Cells

2006 ◽  
Author(s):  
Randall S. Gemmen ◽  
Christopher D. Johnson
Keyword(s):  
Fuel Cell ◽  
Cross Flow ◽  
Reverse Current ◽  
Solid Oxide ◽  
Temperature Gradients ◽  
Oxide Fuel ◽  
Test Results ◽  
Fuel Cell Performance ◽  
A Cell ◽  
The Moment

This paper considers recent model results examining the transient performance of three common solid oxide fuel cell (SOFC) geometries (cross-flow, co-flow, and counter-flow) during load reduction events. Of particular note for large load decrease (e.g., shutdown) is the occurrence of reverse current over significant portions of the cell, starting from the moment of load loss up to the point where equilibrated conditions again provide positive current. This behavior results from the temperature gradients that exist in an SOFC stack. Also reported are test results from an experiment employing two separate button cells coupled together electrically (anode-to-anode and cathode-to-cathode) which are used to confirm the model predictions. The test results confirm the predictions of the model in that temperature gradients are a driver for current circulation within a cell. Also reported are test results of a button cell operated under reverse current to help begin to identify what effects such operation may have on fuel cell performance and durability.

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