Numerical Simulation of Fracture Process of Three-Point Bending Beam of Concrete Based on Modified Mazars Model

2011 ◽  
Vol 295-297 ◽  
pp. 2097-2101
Author(s):  
Ai Min Deng ◽  
Lian Meng Gou ◽  
Dao Yuan Xu
Keyword(s):  
Numerical Simulation ◽  
Failure Process ◽  
Damage Model ◽  
Maximum Load ◽  
Initiation Toughness ◽  
Concrete Fracture ◽  
Three Point Bending ◽  
Finite Element Software ◽  
Fracture Failure ◽  
Accumulation Of Damage

Taking into account the initial damage and the accumulation of damage of concrete, Mazars damage model was modified. Based on the modified Mazars damage model, combined with finite element software ANSYS, the fracture failure process of the three-point bending notched beam of concrete was simulated. The initiation load Pini and maximum load Pmax of the three-point bending beam were determined with the damage criterion, and the full relation curve of the load P versus the loading point displacement Δ of the fracture failure process of the three-point bending beam was obtained. The results show that the method of numerical simulation of concrete fracture failure process is feasible, and based on the initiation load of the crack determined by numerical simulation, the initiation toughness of the beam can be easily calculated, and the problem of calculation of the initiation toughness caused by the initiation load can not be accurately determined in the actual experiment is resolved.

Study of the progressive failure of concrete by phase field modeling and experiments

2021 ◽  
pp. 105678952110014
Author(s):  
Jichang Wang ◽  
Xiaoming Guo ◽  
Nailong Zhang
Keyword(s):  
Phase Field ◽  
Progressive Failure ◽  
Failure Process ◽  
Damage Model ◽  
Concrete Fracture ◽  
Opening Displacement ◽  
Three Point Bending ◽  
Edge Notch ◽  
Modeling And Experiments ◽  
Crack Faces

In this research, experiments and numerical simulations are employed to research the failure process of concrete. Fracture experiments on three-point bending (TPB) concrete beams with a prefabricated edge notch at the middle of the beam bottom are performed using a modified rigid testing instrument. The characteristics of the crack and section are analyzed, including the crack tensile opening displacement, crack length and width, and crack faces characteristics. Also, the full curves of the force-crack tensile opening displacement (CMOD) and force-deflection of the TPB beams with the prefabricated edge notch after breakage are obtained. The phase field (PF) damage model is applied to the mixed-mode and mode-I failure processes of concrete structures through the ABAQUS subroutine user defined element (UEL). The crack path and the full curves of force-CMOD and force-deflection obtained by numerical calculations are consistent with the experimental results and the calculated results of other researchers. The influences of the mesh sizes, initial lengths, and notched depths on the TPB beam of concrete are also analyzed.

Numerical Simulation on Tensile Fracture Process of Multi-Crack Rock Bridge

2012 ◽  
Vol 461 ◽  
pp. 745-748
Author(s):  
Lai Gui Wang ◽  
Xin Rui Gu ◽  
Feng Wei
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Rock Mass ◽  
Fracture Process ◽  
Continuous Medium ◽  
Failure Process ◽  
Tensile Failure ◽  
Tensile Fracture ◽  
Rock Bridge ◽  
Finite Element Software

In order to study the tensile failure of rock bridge, the finite element software which can simulate the cracking of pull and tensile stress was used to simulate the tensile failure process of rock bridge with multi-crack. The general finite element software can only simulation continuous medium, in this paper we succeeded in discontinuous problem with this finite element software. Reach a conclusion of the rupture results of rock bridge in rock mass with multi-crack under the conditions of uniaxial compression, and the law of the stress distribution in the process of destruction.

An Experimental Investigation on Static and Dynamic Fracture Properties of MgAl

2010 ◽  
Vol 97-101 ◽  
pp. 683-686 ◽  
Author(s):  
Wei Zhou Zhong ◽  
Jing Run Luo ◽  
Shun Cheng Song ◽  
Xi Cheng Huang
Keyword(s):  
Crack Tip ◽  
Value Theory ◽  
Initiation Toughness ◽  
Hopkinson Pressure Bar ◽  
Dynamic Stress Intensity Factors ◽  
Static Compression ◽  
Time Dynamic ◽  
Three Point Bending ◽  
Finite Element Software ◽  
Pressure Bar

Three-point bending specimens of MgAl are loaded by MTS material testing equipment and Hopkinson pressure bar. Strength ratio of MgAl subjected to static compression loading is gained. The dynamic response of three-point bending specimen subjected to impact loading is simulated by ABAQUS finite element software. The stress distribution around crack tip is like shape of butterfly. It indicates that stress decreases quickly away from crack tip. Strain gauges are affixed at the swings of butterfly in the experiments and can experience higher strain signal. So the choice of strain gauge position is reasonable. Based on finite displacement method and the least multiplication value theory, dynamic stress intensity factors at different loading velocities are obtained. According to crack initiation time, dynamic initiation toughness is computed. The results indicate that dynamic initiation toughness of MgAl varies at different loading rates and increases with ball velocity.

scholarly journals Experimental and Numerical simulation of a Three Point Bending Test of a Stainless Steel Beam

2021 ◽  
Vol 55 ◽  
pp. 1114-1121
Author(s):  
Daniel Jindra ◽  
Zdeněk Kala ◽  
Jiří Kala ◽  
Stanislav Seitl
Keyword(s):  
Numerical Simulation ◽  
Stainless Steel ◽  
Bending Test ◽  
Steel Beam ◽  
Three Point Bending

Statistical analysis of three-point-bending fracture failure of mortar

2021 ◽  
Vol 300 ◽  
pp. 123883
Author(s):  
Peng Zhang ◽  
Peng Yuan ◽  
Junfeng Guan ◽  
Xianhua Yao ◽  
Lielie Li
Keyword(s):  
Statistical Analysis ◽  
Three Point Bending ◽  
Fracture Failure ◽  
Bending Fracture

Damage analysis and numerical simulation for failure process of a reinforced concrete arch structure

2005 ◽  
Vol 83 (31-32) ◽  
pp. 2609-2631 ◽  
Author(s):  
X.S. Tang ◽  
J.R. Zhang ◽  
C.X. Li ◽  
F.H. Xu ◽  
J. Pan
Keyword(s):  
Numerical Simulation ◽  
Reinforced Concrete ◽  
Failure Process ◽  
Damage Analysis ◽  
Arch Structure

Numerical Simulation of Ring-Shape Rock Failure under Compressive Loading

2011 ◽  
Vol 378-379 ◽  
pp. 15-18
Author(s):  
Yong Bin Zhang ◽  
Zheng Zhao Liang ◽  
Shi Bin Tang ◽  
Jing Hui Jia
Keyword(s):  
Numerical Simulation ◽  
Fracture Process ◽  
Failure Modes ◽  
Failure Process ◽  
Compressive Loading ◽  
Orientation Angle ◽  
Crack Orientation ◽  
Ring Specimen ◽  
Ring Shape ◽  
Good Agreement

In this paper, a ring shaped numerical specimen is used to studying the failure process in brittle materials. The ring specimen is subjected to a compressive diametral load and contains two angled central cracks. Numerical modeling in this study is performed. It is shown that the obtained numerical results are in a very good agreement with the experiments. Effect of the crack orientation angle on the failure modes and loading-displace responses is discussed. In the range of 0°~40°, the fracture paths are curvilinear forms starting from the tip of pre-existing cracks and grow towards the loading points. For the crack orientation angle 90°, vertical fractures will split the specimen and the horizontal cracks do not influence the fracture process.

scholarly journals Numerical simulation of blanking process

2018 ◽  
Vol 157 ◽  
pp. 02038
Author(s):  
Peter Pecháč ◽  
Milan Sága
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Steel Sheet ◽  
Plastic Material ◽  
Material Model ◽  
Rolled Steel ◽  
Finite Element Software ◽  
History Of ◽  
Cold Rolled ◽  
Blanking Process

This paper presents numerical simulation of blanking process for cold-rolled steel sheet metal. The problem was modeled using axial symmetry in commercial finite element software ADINA. Data obtained by experimental measurement were used to create multi-linear plastic material model for simulation. History of blanking force vs. tool displacement was obtained.

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