The Effect of Cable Material Characteristics on Suspendome

2010 ◽  
Vol 156-157 ◽  
pp. 1251-1255 ◽  
Author(s):  
Zhi Hua Chen ◽  
Guo Jun Sun ◽  
Zhan Sheng Liu
Keyword(s):  
Elastic Modulus ◽  
High Temperature ◽  
Low Temperature ◽  
Expansion Coefficient ◽  
Linear Expansion ◽  
Steel Structure ◽  
Linear Expansion Coefficient ◽  
Maximum Displacement ◽  
Material Characteristics ◽  
Prestressed Steel Structure

Cable is the key component in the prestressed steel structure. In order to study the effect of cable elastic modulus and expansion coefficient on the prestressed steel structure, Suspendome of Tianbao Center was taken as the research object and APDL language is applied to write a corresponding program, thereby carrying out analysis to the model; The results indicate that the change of cable expansion coefficient and cable elastic modulus have a different effect on the performance of the suspendome: at high temperature, the effect of the expansion coefficient of hoop cable and radial cable is larger on the maximum displacement; at low temperature, the effect of the elastic modulus of hoop cable is larger on the support constrained force. Therefore, it is necessary to give precise linear expansion coefficient and elastic modulus for different cables.

FeSiB Annealing Technology Based on Amorphous Ribbons of the Linear Expansion Coefficient

2010 ◽  
Vol 428-429 ◽  
pp. 537-539
Author(s):  
Chun Ying Huang ◽  
Man Hua Wan ◽  
Xiao Jun Wang
Keyword(s):  
Elastic Modulus ◽  
Expansion Coefficient ◽  
Amorphous Alloys ◽  
Tensile Deformation ◽  
Linear Expansion ◽  
Thermal Analyses ◽  
Linear Expansion Coefficient ◽  
Dynamic Mechanical ◽  
Amorphous Ribbons

The 4.5mm wide 25μm thick Fe78Si9B13 amorphous alloys were prepared by single-roller method, and it was annealed. The elastic modulus, tensile deformation and line expansion coefficient were investigated by Q800 (dynamic mechanical thermal analyses, DMA). The results showed that the elastic modulus, tensile deformation and line expansion coefficient were enhanced when annealed. Comparing with the annealed ribbons, the change rules of elastic modulus, tensile deformation and line expansion coefficient of the quenched are evident, that the elastic modulus decreases and tensile deformation increase with temperature increases, but line expansion coefficient firstly increase then decrease with temperature increases.

Properties and Microstructure of an HfB2-HfC-SiC Ultra High Temperature Ceramics

2008 ◽  
Vol 368-372 ◽  
pp. 1761-1763 ◽  
Author(s):  
Jin Ping Li ◽  
Song He Meng ◽  
Jie Cai Han ◽  
Xing Hong Zhang
Keyword(s):  
High Temperature ◽  
Expansion Coefficient ◽  
Linear Expansion ◽  
Expansion Ratio ◽  
Linear Expansion Coefficient ◽  
Ultra High Temperature Ceramics ◽  
Arc Heater ◽  
The Mean ◽  
Ultrahigh Temperature ◽  
Increasing Temperature

HfB2-HfC-SiC ultrahigh temperature ceramics (UHTCs) were prepared and characterized in this paper. It is showed that the densities of the HfB2-HfC-SiC reach 98.5% of the theory density. The room temperature compressive properties of the HfB2-HfC-SiC are good, while those at high temperature decrease rapidly. The volume expansion ratio monotonously increases (up to 2.35% at 2300°C) with increasing temperature. Furthermore, with increasing temperature, the average linear expansion coefficient hardly changes, while the instant linear expansion coefficient decreases first, and followed by an increase. The minimum value of the instant linear expansion coefficient is 5.65×10-6/K at 900°C and that of the mean linear expansion coefficient is 7.39×10-6/K at 1340°C. HfB2-HfC-SiC were burned with the plasma arc heater. After 8-second ablation, part of the SiC particles melted and spurted from the composites, and holes appeared.

Reliability Analysis of Prestressed Steel Structure in Regards to Temperature Action

2010 ◽  
Vol 97-101 ◽  
pp. 4415-4419 ◽  
Author(s):  
Zhan Sheng Liu ◽  
Zhi Hua Chen
Keyword(s):  
Expansion Coefficient ◽  
Limit State ◽  
Steel Structure ◽  
Element Model ◽  
State Equation ◽  
Linear Expansion Coefficient ◽  
String Structure ◽  
Expansion Coefficients ◽  
Prestressed Steel Structure ◽  
The Impact

In order to study the impact of various cables expansion coefficients on the reliability of the prestressed steel structure, a finite element model of the beam string structure and a limit state equation controlled by applicability have been established. The Monte Carlo method based on Latin hypercube sample is adopted and APDL language is applied to write a corresponding program, thereby carrying out reliability calculation and analysis to the model; the system reliability and parameters sensitivity of the beam string structure under different cable expansion coefficients and temperature conditions are provided. The results indicate that the change of cable expansion coefficient has a great impact on the reliability of the structure; therefore, it is necessary to give precise linear expansion coefficient for different cables.

Influence of Crushed Basalt Aggregate on Crack Resistance of Concrete

2012 ◽  
Vol 253-255 ◽  
pp. 529-532
Author(s):  
Jian Jun Yan ◽  
Shi Hua Zhou ◽  
Shang Shi Peng
Keyword(s):  
Crack Resistance ◽  
Temperature Stress ◽  
Expansion Coefficient ◽  
Linear Expansion ◽  
Drying Shrinkage ◽  
Temperature Deformation ◽  
Linear Expansion Coefficient ◽  
Volume Deformation

The crack resistance of concrete with crushed basalt aggregate was studied. Compared with the limestone concrete, the basalt concrete has larger drying shrinkage and autogenous volume deformation. The linear expansion coefficient of basalt concrete is 1.3×10－6 /°C larger than that of limestone concrete, and it has additional temperature deformation of 24.1×10－6. According to the analysis on temperature-stress of concrete, the cracking temperature of basalt concrete is 8.9°C higher than that of limestone concrete, and the crack resistance of basalt concrete is unfavorable.

scholarly journals Technological Forecasting of Deformations in Flat Parts

2020 ◽  
Vol 3 (1) ◽  
pp. 1-12
Author(s):  
Tatiana N. Ivanova ◽  
Witold Biały ◽  
Jiři Fries ◽  
Victor Nordin
Keyword(s):  
Expansion Coefficient ◽  
Linear Expansion ◽  
Plate Thickness ◽  
Heat Removal ◽  
Quality Parameters ◽  
Grinding Wheel ◽  
Linear Expansion Coefficient ◽  
Plate Material ◽  
Thermal Deformations ◽  
Geometric Size

AbstractThe deformation of a part occurring in the process of grinding directly influences its exploitation and quality parameters. The instability of shape and size, which occurs due to an imbalance of residual stress, can be the one of the major causes of deformation of a part. The decrease in stress slows down the deformation process. Considering the regularities of heat source intensity dependence on the grinding modes, it can be asserted that with increasing grinding depth and grinding wheel hardness, the value increases and it decreases with a growth in a speed of the part and the use of cooling. The higher the heat removal is and the better lubricant properties of the liquid are, the more significant the decrease in is. Changing these values allows regulation of the residual stresses. As a result of the research on determination of deformations, it is recommended to reduce thermal deformations by considering the geometric size of a plate to be machined, linear expansion coefficient of plate material and an allowance for nonflatness from thermal deformations. The value of nonflatness from thermal deformations is directly proportional to linear expansion coefficient of plate material and its square overall dimensions. At the same time, the value of nonflatness is inversely proportional to the plate thickness.

Utilization of Doppler effect and laser heterodyne to measure linear expansion coefficient of metal

2018 ◽  
Vol 47 (7) ◽  
pp. 706005
Author(s):  
布音嘎日迪 Bu Yingaridi ◽  
仲维丹 Zhong Weidan ◽  
甄佳奇 Zhen Jiaqi ◽  
高亚臣 Gao Yachen ◽  
刘 勇 Liu Yong ◽  
...  
Keyword(s):  
Expansion Coefficient ◽  
Doppler Effect ◽  
Linear Expansion ◽  
Linear Expansion Coefficient ◽  
Laser Heterodyne
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