Factors Affecting the Tensile Strength of Linear Vibration Welds of Dissimilar Nylons

2002 ◽  
Author(s):  
Liying Qi ◽  
Dan Watt ◽  
Bobbye Baylis
Keyword(s):  
Tensile Strength ◽  
Linear Vibration ◽  
Factors Affecting

Optimization of Post Weld Aging on Duplex Stainless Steel UNS31803 Grade with 23 Factorial Designs

2013 ◽  
Vol 717 ◽  
pp. 62-66
Author(s):  
Prachya Peasura ◽  
Nansa Arng Santirat
Keyword(s):  
Tensile Strength ◽  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Aging Time ◽  
Aging Temperature ◽  
Solution Temperature ◽  
P Value ◽  
Corrosion Properties ◽  
Factors Affecting ◽  
Time Interaction

Duplex stainless steel are good combination of economy, weldability and toughness and are often selected where both strength and corrosion properties are crucial. The research was study the effect of post weld aging parameter on mechanical properties. The specimen was duplex stainless steel UNS31803 grade sheet of 10 mm thickness. This experimental study aims at 23factorial design optimizing various post weld aging parameters including solution temperature at 900 and 1,050 °C, post weld aging temperature at 650 and 850 °C and post weld aging time were set at 4 and 8 hour. The welded specimens were tested by hardness testing in heat affected zone and tensile strength testing. The result showed that both of solution temperature, post weld aging temperature and post weld aging time interaction on hardness and tensile strength at 95% confidential (P value < 0.05). Factors affecting the optimum were solution temperature 1050 °C, PWA temperature 850°C and PWA time 4 hr. at hardness optimum of 282.36 HV and tensile strength optimum of 109.37 kN. This research can bring information to the foundation in choosing the appropriate post weld aging parameters to duplex stainless steel welds.

scholarly journals Numerical Study on Identification of Time Varying Parameters of Vibration Systems

1997 ◽  
Vol 4 (1) ◽  
pp. 69-76
Author(s):  
Yanchun Liang ◽  
Qiang Zhen ◽  
Zaishen Wang
Keyword(s):  
Linear Model ◽  
Nonlinear Term ◽  
Numerical Study ◽  
Time Varying ◽  
Linear Vibration ◽  
Factors Affecting ◽  
Varying Parameters ◽  
Time Varying Parameters ◽  
On Line ◽  
Time Invariant

An on-line least squares algorithm has previously been successfully applied to linear vibration systems in order to identify time varying parameters. In this article the limitations of the approach and the factors affecting the identification are further examined. The existence of the nonlinear term is determined by means of the time varying characteristics of the estimated linear parameters using the linear model and the data from a time invariant nonlinear system. The identification of the time varying linear parameters is also examined in accordance with the linear model by using the data with nonlinear elements.

Experimental Study on Factors Affecting the Bond-Slip Properties of Concrete Reinforced by Bamboo-Based Fiber Composites

2014 ◽  
Vol 584-586 ◽  
pp. 1558-1562
Author(s):  
Jian Zhou ◽  
Su Ma ◽  
He Tao Hou ◽  
Jing Jing Li ◽  
Hai Ning Liu ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Bond Length ◽  
Orthogonal Experiment ◽  
Influencing Factor ◽  
Fiber Composites ◽  
Bond Slip ◽  
Factors Affecting ◽  
Strength Grade ◽  
Mm Bond ◽  
Section Form

Bond-slip properties of concrete reinforced by bamboo-based fiber composites were investigated. The influences of strength grade of concrete, bond length, strength grade of bamboo-bar and section form were studied based on the L16(45) orthogonal experiment. The function law was uncovered to support the anchoring checking between concrete and bamboo-based fiber composites. The results show that: the tensile strength of bamboo-based fiber composites stables at 200Mpa with large inflation rate; section form of the composites is the key influencing factor, but should not be too large; bond length and strength grade of concrete are important factors; tensile strength of the composites is not significant factor. C35 concrete, 50 mm bond length, 200Mpa tensile strength of the composites and 10mm*10mm section form are the optimal combinations.

Study on Formula for Glass Fiber/Microcellular Unsaturated Polyester Composites Preparation

2011 ◽  
Vol 233-235 ◽  
pp. 2595-2599 ◽  
Author(s):  
Xue Ni Zhao ◽  
Bin Zhou ◽  
Wu Yong Wan ◽  
Shan Qi Zeng ◽  
Wei Ren
Keyword(s):  
Tensile Strength ◽  
Glass Fiber ◽  
Fiber Length ◽  
Unsaturated Polyester ◽  
Curing Agent ◽  
Average Cell Size ◽  
Average Cell ◽  
Factors Affecting ◽  
Styrene Content ◽  
Polyester Composites

Formula for glass fiber/microcellular unsaturated polyester composites (GF/MCUP) using supersaturated gas technology was studied by the way of orthogonal experiment. The results showed that these factors affecting average cell size from strongly to weakly were styrene content, accelerant content, glass fiber length, curing agent and glass fiber content, respectively. The factors affecting average cell density from strongly to weakly were accelerant content, styrene content, glass fiber content, curing agent content and glass fiber length, respectively. Curing agent content was the major factor affecting impact strength of GF/MCUP. The factors revealed no obvious difference in affecting tensile strength. Under the optimizing processing condition, the average cell size of GF/MCUP was about 8 μm and the cell density was 1.19×109 cells/cm3. The 153.70 and 255.84 % increase in impact strength were gained over that of GF/UP and UP, respectively. The corresponding 20.24 and 82.51% increase in tensile strength-to-weight ratio were gained over that of GF/UP and UP, respectively.

scholarly journals Strength Mechanism and Influence Factors for Cold Recycled Asphalt Mixture

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Tao Ma ◽  
Hao Wang ◽  
Yongli Zhao ◽  
Xiaoming Huang ◽  
Yuhui Pi
Keyword(s):  
Tensile Strength ◽  
Asphalt Mixture ◽  
Influence Factors ◽  
High Viscosity ◽  
Asphalt Mixtures ◽  
Key Factors ◽  
Recycled Asphalt ◽  
Factors Affecting ◽  
Surface Areas ◽  
Emulsified Asphalt

This study focused on the key factors affecting the tensile strength of cold recycled asphalt mixture with cement and emulsified asphalt. The specific surface areas and strength of RAP were analyzed. The interaction between the emulsified asphalt and cement was observed. Comprehensive laboratory testing was conducted to evaluate the influences of RAP, emulsified asphalt, and cement on the tensile strength of cold recycled asphalt mixture. It is found that although RAP is used as aggregates, its inner structure and strength are much different from real aggregates. The strength of RAP has decisive effect on the strength of cold recycled asphalt mixture. New aggregates and fine gradation design can help improve the bonding between RAP and binder. For emulsified asphalt, slow setting of asphalt can give sufficient time for cement to hydrate which is helpful for strength formation in the cold recycled asphalt mixture. The high viscosity of asphalt can improve the early strength of cold recycled asphalt mixture that is important for traffic opening in the field. Cement is an efficient additive to improve the strength of cold recycled asphalt mixtures by promoting demulsification of emulsified asphalt and producing cement hydrates. However, the cement content is limited by RAP.

scholarly journals A Comprehensive Study on the Factors Affecting the Workability and Mechanical Properties of Ambient Cured Fly Ash and Slag Based Geopolymer Concrete

2021 ◽  
Vol 11 (18) ◽  
pp. 8722
Author(s):  
Rana Muhammad Waqas ◽  
Faheem Butt ◽  
Xulong Zhu ◽  
Tianshui Jiang ◽  
Rana Faisal Tufail
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Compressive Strength ◽  
Fly Ash ◽  
Geopolymer Concrete ◽  
Factors Affecting ◽  
Naoh Solution ◽  
New Material ◽  
Comprehensive Study ◽  
Slag Content

Geopolymer concrete (GPC), also known as an earth friendly concrete, has been under continuous study due to its environmental benefits and potential as a sustainable alternative to conventional concrete construction. However, there is still a lack of comprehensive studies focusing on the influence of all the design mix variables on the fresh and strength properties of GPC. GPC is still a relatively new material in terms of field application and has yet to secure international acceptance as a construction material. Therefore, it is important that comprehensive studies be carried out to collect more reliable information to expand this relatively new material technology to field and site applications. This research work aims to provide a comprehensive study on the factors affecting the fresh and hardened properties of ambient cured fly ash and slag based geopolymer concrete (FS-GPC). Industrial by-products, fly ash from thermal power plants, and ground granulated blast furnace slag from steel industries were utilized to produce ambient cured FS-GPC. A series of experiments were conducted to study the effect of various parameters, i.e., slag content (10%, 20%, 30%, and 50%), amount of alkaline activator solution (AAS) (35% and 40%), sodium silicate (SS) to sodium hydroxide (SH) ratio (SS/SH = 2.0, 2.5 and 3.0), sodium hydroxide concentration (10 M, 12 M, and 14 M) and addition of extra water on fresh and mechanical properties of FS-GPC. The workability of the fresh FS-GPC mixes was measured by the slump cone test. The mechanical properties of the mixes were evaluated by compressive strength, split tensile strength, flexure strength, and static modulus tests. The results revealed that workability of FS-GPC is greatly reduced by increasing slag content, molarity of NaOH solution, and SS/SH ratio. The compressive strength was improved with an increase in the molarity of NaOH solution and slag content and a decrease in AAS content from 40% to 35%. However, the influence of SS/SH ratio on mechanical properties of FS-GPC has a varying effect. The addition of extra water to enhance the workability of GPC matrix caused a decrease in the compressive strength. The validity of the equations suggested by previous studies to estimate the tensile and flexural strength and elastic modulus of FS-GPC mixes were also evaluated. Based on the test results of this study, empirical equations are proposed to predict the splitting tensile strength, flexural strength, and elastic modulus of ambient cured FS-GPC. The optimal mixtures of FS-GPC in terms of workability and mechanical properties were also proposed for the field applications.

scholarly journals Study of Factors Affecting Tensile Strength of Grey Cast Iron

2021 ◽  
Vol 23 (11) ◽  
pp. 759-768
Author(s):  
Abhijit Ramesh Patil ◽  
◽  
P. N. Gore ◽  
Keyword(s):  
Tensile Strength ◽  
Cast Iron ◽  
Tensile Force ◽  
Grey Cast Iron ◽  
Steel Scrap ◽  
Factors Affecting ◽  
Graphite Morphology ◽  
Grey Cast ◽  
Clear Idea ◽  
High Temperature Tensile

Tensile strength of a material is the capacity of material to withstand tensile force without failure. Tensile strength is important mechanical property of material which gives direction to use it for proposed application safely. It is very important parameter considered in designing sound product. Grey cast iron carries properties like high compressive strength, castable, good machinability, good abrasion resistance, high thermal conductivity, resist to expand under high temperature. Tensile strength of grey cast depends mainly on carbon content, steel scrap % used, inoculation, graphite morphology, cooling time. Present paper summarizes study of factors affecting tensile strength of grey cast iron. With the study of factors affecting the tensile strength of cast iron it is very helpful to achieve required tensile strength by controlling the factors affecting strength of the material. While studying and experimenting on the behavior of tensile strength, clear idea comes into the picture how the strength is affected.

scholarly journals ANALYSIS OF THE MAIN FACTORS AFFECTING THE QUALITY OF RESTORATION WORK OF CONCRETE AND REINFORCED CONCRETE STRUCTURES

2021 ◽  
Vol 81 (3) ◽  
pp. 91-97
Author(s):  
B.M. Aubakirova ◽  
◽  
E.R. Onlasynov ◽  
Keyword(s):  
Tensile Strength ◽  
Reinforced Concrete ◽  
Adhesion Strength ◽  
Concrete Structures ◽  
Reinforced Concrete Structures ◽  
Factors Affecting ◽  
Restoration Work ◽  
Main Factors

This article examines the analysis of the main factors affecting the quality of the restoration work of concrete and reinforced concrete structures. The ways of increasing the capacity of repair concrete by increasing the adhesion strength are shown. As a result, its value should not be lower than the tensile strength of concrete.

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