Three-dimension finite element analysis on coupling effect of piezoelectric ceramics in concrete slabs under the concentrated load

2009 ◽  
Author(s):  
Chen Qu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Coupling Effect ◽  
Piezoelectric Ceramics ◽  
Concrete Slabs ◽  
Three Dimension ◽  
Element Analysis ◽  
Concentrated Load

Nonlinear finite element analysis of tests of reinforced concrete slabs

2021 ◽  
Author(s):  
G. I. Zarate Garnica ◽  
Y. Yang ◽  
E. O. L. Lantsoght
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Reinforced Concrete ◽  
Nonlinear Finite Element Analysis ◽  
Nonlinear Finite Element ◽  
Concrete Slabs ◽  
Load Testing ◽  
Element Analysis ◽  
Concentrated Load ◽  
Reinforced Concrete Slabs

<p>In the Netherlands, many existing reinforced concrete slab bridges were built more than 50 years ago. Upon assessment with the new codes, a large number of this type of bridge rate insufficiently. Since many of these existing bridges present complex material properties and boundary conditions, proof load testing is considered an effective method to assess their capacity. However, to be able to safely apply proof load testing on slab bridges, verification in the laboratory is necessary. Therefore, experiments on reinforced concrete slabs of 5 m × 2,5 m × 0,3 m under a concentrated load with varying shear span to depth ratios are carried out in the laboratory of Delft University of Technology. Additionally, nonlinear finite element analysis is used to simulate the experiments following the guidelines of nonlinear finite element analysis published by the Dutch ministry of infrastructure and water management. The results from the finite element and experimental analyses are compared in terms of peak load, failure mode, and crack pattern. A good agreement between the experimental and numerical investigations is observed.</p>

Influence of temperature and strain rate on the longitudinal compressive crashworthiness of 3D braided composite tubes and finite element analysis

2016 ◽  
Vol 26 (7) ◽  
pp. 1003-1027 ◽  
Author(s):  
Xianyan Wu ◽  
Qian Zhang ◽  
Bohong Gu ◽  
Baozhong Sun
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Strain Rate ◽  
Coupling Effect ◽  
Three Dimensional ◽  
Composite Tubes ◽  
Element Analysis ◽  
Impact Compression ◽  
Mechanical Coupling ◽  
The Impact

This article reports the longitudinal compressive crashworthiness of three-dimensional four-step circular braided carbon/epoxy composite tubes at temperatures of 23, −50, and −100℃ under strain rate ranging from 340 to 760/s both experimentally and finite element analysis. The experimental results showed that the compression strength, stiffness, and specific energy absorption increased with the decrease in temperature and with the increase in strain rate. It also showed that, the compressive damage morphologies were sensitive to the change in temperature and strain rate. A coupled thermal-mechanical numerical analysis was conducted to find the thermo/mechanical coupling effect on the compressive crashworthiness of the three-dimensional composite tube. The temperature distributions in the braided preform and the resin during the impact compression were also calculated through finite element analysis. From the finite element analysis results, the inelastic heat generation was seen to be more in the preform than the matrix and its distribution and accumulation led to the damage progress along the loading direction.

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