Numerical Study of Dynamic Load Concrete Failure Process Using Extended Finite Element Method

2013 ◽  
Vol 336-338 ◽  
pp. 1379-1382
Author(s):  
Cheng Fan ◽  
Xue Qing Jing
Keyword(s):  
Finite Element ◽  
Dynamic Load ◽  
Numerical Study ◽  
Shear Crack ◽  
Failure Process ◽  
Extended Finite Element ◽  
Physical Experiments ◽  
Concrete Failure ◽  
Extension Direction ◽  
Good Agreement

This paper is mainly based on the basic principle of the extended finite element ,in the large commercial software abaqus on the platform of dynamic load eccentric mixed-mode of concrete failure process are numerically simulated, the results showed that the crack together under tension and shear ,crack extension direction and the direction of cracks was obvious deflection, and is in good agreement with the physical experiments, also shows that the extended finite element fracture problems have very good advantage.

Numerical Study of Koyna Dam Failure Process Using Extended Finite Element Method

2013 ◽  
Vol 734-737 ◽  
pp. 2851-2854
Author(s):  
Cheng Fan ◽  
Xue Qing Jing
Keyword(s):  
Finite Element ◽  
Crack Initiation ◽  
Numerical Study ◽  
Failure Process ◽  
Initiation Site ◽  
Scientific Basis ◽  
Propagation Path ◽  
Dam Failure ◽  
Extended Finite Element ◽  
Basic Principles

This article expound the development process and the basic principles of the extended finite element, In the large commercial software abaqus on the platform of India koyna dam failure process are numerically simulated in earthquake, and koyna dam crack initiation, through ,propagation path analysis. The results show that the earthquake began to crack initiation site often at the large dam slope fold. The study provides a theoretical foundation and scientific basis for the actual engineering improves safety.

Experimental, numerical and parametric studies on stress concentration factors of T-joints under tension

2021 ◽  
pp. 136943322110499
Author(s):  
Feleb Matti ◽  
Fidelis Mashiri
Keyword(s):  
Finite Element ◽  
Stress Concentration ◽  
Numerical Study ◽  
Hot Spot ◽  
Joint Models ◽  
Element Analysis ◽  
T Joints ◽  
Concentration Factors ◽  
Stress Concentration Factors ◽  
Good Agreement

This paper investigates the behaviour of square hollow section (SHS) T-joints under static axial tension for the determination of stress concentration factors (SCFs) at the hot spot locations. Five empty and corresponding concrete-filled SHS-SHS T-joint connections were tested experimentally and numerically. The experimental investigation was carried out by attaching strain gauges onto the SHS-SHS T-joint specimens. The numerical study was then conducted by developing three-dimensional finite element (FE) T-joint models using ABAQUS finite element analysis software for capturing the distribution of the SCFs at the hot spot locations. The results showed that there is a good agreement between the experimental and numerical SCFs. A series of formulae for the prediction of SCF in concrete-filled SHS T-joints under tension were proposed, and good agreement was achieved between the maximum SCFs in SHS T-joints calculated from FE T-joint models and those from the predicted formulae.

Composite Material of Concrete Meso-Failure Test

2010 ◽  
Vol 160-162 ◽  
pp. 135-139
Author(s):  
Ji Kun Zhao
Keyword(s):  
Dynamic Load ◽  
Main Crack ◽  
Failure Process ◽  
Strain Curve ◽  
Static Modulus ◽  
Starting Point ◽  
Beam Shear ◽  
Concrete Damage ◽  
Extension Direction ◽  
Static Modulus Of Elasticity

With static and dynamic load for the research background, this paper conducted a four-phase composite model for concrete damage test simulation of micro-mechanics. The two kinds of three-point bending beam load ware studied in case of failure process. The study found that the location of the main crack in the most disadvantaged section of beam shear in the vicinity. Crack is always along the aggregate and the mortar bond zone be extended. The main crack extension direction is always toward the load point. The main crack is showing a tortuous shape. Dynamic load and static load the stress - strain curve is basically similar shape, but basically the same as the starting point of the initial fracture. Stress wave in the sample after multiple visits, is the main reason leading to the breakdown of the sample. Dynamic load cases, the concrete elastic modulus higher than the static modulus of elasticity, numerical simulation results agree well with the experimental results.

scholarly journals Extended Finite Element Numerical Analysis of Scale Effect in Notched Glass Fiber Reinforced Epoxy Composite

2015 ◽  
Vol 62 (2) ◽  
pp. 217-236 ◽  
Author(s):  
Mohammed Y. Abdellah ◽  
Mohammad S. Alsoufi ◽  
Mohamed K. Hassan ◽  
Hamza A. Ghulman ◽  
Ahmed F. Mohamed
Keyword(s):  
Finite Element ◽  
Size Effect ◽  
Glass Fiber ◽  
Scale Effect ◽  
Fracture Process ◽  
Fiber Reinforced ◽  
Extended Finite Element ◽  
Glass Fiber Reinforced ◽  
Nominal Strength ◽  
Good Agreement

Abstract Nominal strength reduction in cross ply laminates of [0/90]2s is observed in tensile tests of glass fiber composite laminates having central open hole of diameters varying from 2 to 10 mm. This is well known as the size effect. The extended finite element method (XFEM) is implemented to simulate the fracture process and size effect (scale effect) in the glass fiber reinforced polymer laminates weakened by holes or notches. The analysis shows that XFEM results are in good agreement with the experimental results specifying nominal strength and in good agreement with the analytical results based on the cohesive zone model specifying crack opening displacement and the fracture process zone length

Numerical Study of Crack Propagation Path in Three-Point Bending Beam Using Extended Finite Element Method

2013 ◽  
Vol 353-356 ◽  
pp. 3615-3618 ◽  
Author(s):  
Cheng Fan ◽  
Xue Qing Jing
Keyword(s):  
Finite Element ◽  
Fracture Energy ◽  
Numerical Study ◽  
Peak Stress ◽  
Bending Test ◽  
Propagation Path ◽  
Extended Finite Element ◽  
Basic Principles ◽  
Three Point Bending ◽  
Expansion Path

This paper is based on the basic principles of the extended finite element in the large commercial software ABAQUS on the platform of different fracture energy of three point bending test of concrete are numerically simulated, and three-point bending crack initiation, through expansion path analysis. The results show that has a direct impact on the size of the fracture energy of concrete specimens destruction, Fracture of brittle fracture can be small more obvious, produce more harmful. When softening decline stage after peak stress occurred in the "jump back" phenomenon.

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