Softened Damage Model for Finite Element Analysis of Structural Concrete Deep Beams

2001 ◽  
Vol 98 (1) ◽  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Damage Model ◽  
Deep Beams ◽  
Structural Concrete ◽  
Element Analysis

scholarly journals Finite Element Analysis of the Size Effect on Ceramic Strength

Materials ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 2885 ◽  
Author(s):  
Kyohei Takeo ◽  
Yuya Aoki ◽  
Toshio Osada ◽  
Wataru Nakao ◽  
Shingo Ozaki
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Size Effect ◽  
Damage Model ◽  
Fracture Probability ◽  
Element Analysis ◽  
Weibull Statistics ◽  
Weakest Link ◽  
The Finite Element Analysis ◽  
The Relationship

The most prominent effect of the weakest link theory, which is used to derive the Weibull statistics of ceramic strength, is the size effect. In this study, we analyze the size effect on ceramic strength using the finite element analysis (FEA) methodology previously proposed by the authors. In the FEA methodology, the data of the microstructure distribution (i.e., relative density, size, and aspect ratio of the pore and the grain size) are considered as input parameters of a continuum damage model via a fracture mechanical model. Specifically, we examine five sizes of rectangular specimens under three types of loading conditions. Then, we simulate the fracture stresses of sets of 30 specimens under each size and loading condition and obtain the relationship between the scale parameter and effective volume using the Weibull distribution. The results suggest that the proposed FEA methodology can be applied to the analysis of the fracture probability of ceramics, including the size effect.

Finite Element Analysis of Hybrid Fiber Reinforced HPC Deep Beams under Shear Load

2013 ◽  
Vol 419 ◽  
pp. 889-894
Author(s):  
Sheng Bing Liu ◽  
Li Hua Xu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Polypropylene Fiber ◽  
Shear Capacity ◽  
Test Results ◽  
Fiber Reinforced ◽  
Hybrid Fiber ◽  
Deep Beams ◽  
Element Analysis ◽  
Good Agreement

18 different groups of hybrid fiber (steel fiber and polypropylene fiber) reinforced HPC deep beams and 2 groups of HPC deep beams without fiber were made. The shear tests under the static load and the numerical simulation by ABAQUS were conducted. Good agreement are found between test results and simulation results.The results of finite element analysis indicate that with the increment of reinforcement ratio, the shear capacity of hybrid fiber reinforced HPC deep beams increases, but quite limited. The variation of shear capacity of hybrid fiber reinforced HPC deep beams is not obvious as the shear-span ratio changes (when ) . The increment of span-depth ratio can improve the shear capacity of hybrid fiber reinforced HPC deep beams, but only with small amplitude. All these regularities are similar to those of ordinary reinforced concrete deep beams.

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