Calculation of Stretch Stress of Double-Layer Plate Composites

2020 ◽  
Vol 861 ◽  
pp. 529-533
Author(s):  
Yan Ru Li ◽  
Wan Shan Chen ◽  
Zhen Hai Wang ◽  
Hai Bo Jiang
Keyword(s):  
Elastic Modulus ◽  
Shear Modulus ◽  
Double Layer ◽  
Maximum Stress ◽  
Laminate Composite ◽  
Analytical Calculation ◽  
Adhesive Layer ◽  
External Stress ◽  
Calculation Formula ◽  
Middle Section

The stretch stress of each layer of laminate composite undergoes complex changes after being stretched, which significantly affects the stretch strength. In order to determine the magnitude of the change, the paper directly solved the stretch stress using the analytical method through simple assumptions, and obtained the analytical calculation formula. Studies on double-layer plates show that the magnitude of stretch stress is closely related to the elastic modulus, length and thickness dimensions of the plate layer, the shear modulus of the adhesive, the thickness of the adhesive layer, and the external stress, and the maximum stress occurs at the middle section. The calculation of the formula provides a convenient way to check the stretch strength.

scholarly journals Shear modulus and yield stress of foams: contribution of interfacial elasticity

Soft Matter ◽  
2021 ◽  
Vol 17 (14) ◽  
pp. 3937-3944
Author(s):  
Annika R. Völp ◽  
Norbert Willenbacher
Keyword(s):  
Elastic Modulus ◽  
Block Copolymer ◽  
Shear Modulus ◽  
Yield Stress ◽  
Protein Food ◽  
General Correlation

A general correlation of foam shear modulus G0 and yield stress τy with the interfacial elastic modulus of foaming solutions in shear and dilation E∞ was found for surfactant, block-copolymer, protein, food, and particle-stabilized foams.

Study on Elasto-Plastic Stability Bearing Capacities for K6 Single-Layer Reticulated Shells under Fire Conditions

2012 ◽  
Vol 204-208 ◽  
pp. 1174-1178 ◽  
Author(s):  
Yin Bai ◽  
Jian Lei Zhai ◽  
Yong Jiu Shi ◽  
Yuan Qing Wang
Keyword(s):  
Elastic Modulus ◽  
High Temperature ◽  
Temperature Distribution ◽  
Ambient Temperature ◽  
Single Layer ◽  
Calculation Formula ◽  
Uniform Temperature ◽  
Global Instability ◽  
Stability Bearing Capacity ◽  
Plastic Stability

The elastic modulus of steel will decrease in case of high temperature which makes the reticulated shells easier to have the global instability phenomenon. In order to obtain the elasto-plastic stability bearing capacities for K6 single-layer reticulated shells [1], nonlinear finite analysis compete process was conducted by ANAYS software under on the two typical cases which include global non-uniform temperature distribution and localized high temperature. Based on the calculation formula for single-layer reticulated shells at ambient temperature, the calculation formula for elasto-plastic stability bearing capacity for K6 single-layer reticulated shells was obtained.

A Kind of Electrode Printing Screen of Equivalent Elastic Modulus Calculation Method

2013 ◽  
Vol 546 ◽  
pp. 81-83
Author(s):  
Xin Feng Wang ◽  
Qing Quan Liao ◽  
Fang Xie ◽  
Yi Tao
Keyword(s):  
Mechanical Properties ◽  
Elastic Modulus ◽  
Performance Analysis ◽  
Calculation Method ◽  
Mechanical Analysis ◽  
Calculation Formula ◽  
Manufacturing Equipment ◽  
Mechanics Performance

Electrode printing screen is an important component in electrode printing manufacturing equipment. Its mechanical properties directly related to printing electrode precision and equipment life, so it is necessary for calculation of mechanics performance analysis. In this paper, by using material mechanics knowledge, the equivalent elastic modulus calculation formula of electrode printing screen is derived and can be applied to mechanical analysis and calculation of electrode printing screen.

scholarly journals Design of the Height of Antiglare Panels along Concave Vertical Curves

2018 ◽  
Vol 2018 ◽  
pp. 1-10
Author(s):  
Guo-hua Liang ◽  
Chen-hao Dong ◽  
Yu Li ◽  
Ge Li ◽  
Xiao-xia Hu ◽  
...  
Keyword(s):  
Simulation Software ◽  
Gradual Transition ◽  
Calculation Formula ◽  
Middle Section ◽  
Height Difference ◽  
Transition Section ◽  
Chinese Standard ◽  
Visual Continuity

This study introduces a method for calculating the height of antiglare panels for concave vertical curves. The concave vertical curve is divided into a straight-slope section, transition section, and middle section. The height of the antiglare panels in the middle section is designed based on the glare distance. The height in the straight-slope section is designed based on the height calculation formula given by the Chinese standard. The height of the antiglare panels in the middle section is greater than that in the straight-slope section. There should be a gradual transition in the height difference of the antiglare panels in the transition section. The height gradient of the antiglare panels in the transition section must be designed to ensure visual continuity and comfort for drivers. In the transition section, the transition design is carried out on the height difference of the antiglare panels using the UC-Win/Road simulation software to determine the acceptable height difference for drivers. When the radius of the concave vertical curve does not exceed 30,000 m, the height of the antiglare panel is required to be designed, and the height difference should not exceed 6 cm.

First-Principles Study of the Elastic Properties of Hexagonal Phase ScAx (A=H, He)

2013 ◽  
Vol 690-693 ◽  
pp. 1723-1727
Author(s):  
Kai Min Fan ◽  
Li Yang ◽  
Jing Tang ◽  
Qing Qiang Sun ◽  
Xiao Tao Zu
Keyword(s):  
Elastic Modulus ◽  
Shear Modulus ◽  
Bulk Modulus ◽  
First Principles ◽  
Poisson’S Ratio ◽  
Hexagonal Phase ◽  
Poisson's Ratio ◽  
First Principles Calculations ◽  
Charge Densities ◽  
Change Mechanism

First-principles calculations are performed to investigate the Young’s modulus, bulk modulus, shear modulus and Poisson’s ratio of hexagonal phase ScAx(A=H, He), where x=0, 0.0313, 0.125 and 0.25, represent the ratio of interstitial atoms A (A=H, He) to Sc atoms. The influences of hydrogen concentrations and helium concentrations on elastic modulus and Poisson’s ratio of ScAx(A=H, He) have been studied. The results indicate that hydrogen and helium have different effects on the elastic modulus of hexagonal phase scandium. The change mechanism of the Poisson’s ratio with the variation of the x ranging from 0 to 0.25 has also been studied in hexagonal phase ScAx(A=H, He). In addition, the changes in the charge densities of ScAxdue to the presence of hydrogen and helium have been calculated.

Analysis on Stress and Deformation of Low Elastic Modulus Concrete Cutoff Wall inside the Dam Body

2011 ◽  
Vol 130-134 ◽  
pp. 3208-3215 ◽  
Author(s):  
Ru Mou ◽  
Chang Jie Xu ◽  
Xiao Hua Ma
Keyword(s):  
Elastic Modulus ◽  
Critical Value ◽  
Middle Section ◽  
Dimensional Model ◽  
Cutoff Wall ◽  
3 Dimensional ◽  
Low Elastic Modulus ◽  
Edge Part ◽  
Stress And Deformation ◽  
Better Than

Based on the simulation of a low elastic modulus concrete cutoff wall, the effect of dam constitutive model, elastic modulus of cutoff wall, the height of dam on the stress and deformation of the cut off wall is analyzed systematically. A critical value of cutoff wall’s elastic modulus values is proposed, when the elastic modulus overruns the value, the stress of wall increases fast, while almost no change when the elastic modulus is lower than the value. By comparing the sensitivity of cut off wall’s stress and deformation to the change of wall’s elastic modulus and dam’s elastic modulus, the effect of reducing the wall’s elastic modulus on the stress and deformation of wall is proved to be better than the way of enhancing the dam’s elastic modulus. Meanwhile by comparing the results between 2-dimensional model and 3-dimensional model, 2-dimensional model is proved to be only suitable for the analysis of middle section of the dam, while 3-dimensional model is suitable for the whole section, including the edge part.

scholarly journals Mechanical Properties of Manufactured-Sand Concrete after High Temperatures

2015 ◽  
Vol 9 (1) ◽  
pp. 1007-1011
Author(s):  
Zhengfa Chen ◽  
Hehua Zhu ◽  
Zhiguo Yan ◽  
Gaojv Peng
Keyword(s):  
Mechanical Properties ◽  
Elastic Modulus ◽  
Mass Loss ◽  
High Temperatures ◽  
Residual Strength ◽  
Elevated Temperatures ◽  
Raw Materials ◽  
Concrete Mixture ◽  
Calculation Formula ◽  
Manufactured Sand

In this paper, to study mechanical properties of manufactured-sand concrete after high temperatures, experiments on the residual strength of manufactured-sand concrete were carried out under high temperatures in which raw materials performances and concrete mixture proportion were considered. The mechanism of elevated temperatures on residual strength was theoretically discussed, and the calculation formula of residual strength was given. The results indicated that with the increasing of temperature, the mass loss was small while the reducing of strength and the elastic modulus of manufactured-sand concrete were significantly.

Destroy Probability of Ship Defensive Structure Subjected to Underwater Contact Explosions

2008 ◽  
Vol 44-46 ◽  
pp. 297-302 ◽  
Author(s):  
Jing Zhang ◽  
Xing Hua Shi ◽  
Ding Hai Xu ◽  
Shan Wang
Keyword(s):  
Monte Carlo ◽  
Elastic Modulus ◽  
Shell Structure ◽  
Maximum Stress ◽  
Random Number ◽  
Plate Material ◽  
Multilayer Plate ◽  
Structure Interaction ◽  
Fem Method ◽  
Defensive Structure

The reliability of ship defensive structure subjected to underwater contact explosions is important both in theory and engineering. Because of the complex response of structure under explosions in which the fluid-structure-interaction should be considered, the problem under discussion could not be solved by analytical method. The Monte Carlo combined with FEM method is used to solve this problem in this paper. The samples of basic random variables that are dynamite density, the elastic modulus and ultimate strength of plate material are generated by the random number generate program. Then, with these samples, the simulations of multilayer plate-shell structure subjected to underwater contact explosions are done by LS-DYNA, and the maximum stress of each plate is obtained, which should be validated to obey the normal distribution. Based on the intensity rule, the destroy index is introduced in this paper, then the destroy probability of each plate and system are calculated using the basic theory of reliability.

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