Influence of crack tip sharpness and radius on the strain distribution in rubbers analyzed by finite element simulation and experiments

2017 ◽  
pp. 89-96
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Strain Distribution ◽  
Crack Tip ◽  
Element Simulation

Finite Element Simulation of Stable Fatigue Crack Growth Using Critical CTOD Determined by Preliminary Finite Element Analysis

2014 ◽  
Vol 891-892 ◽  
pp. 1675-1680
Author(s):  
Seok Jae Chu ◽  
Cong Hao Liu
Keyword(s):  
Finite Element ◽  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Finite Element Simulation ◽  
Crack Growth ◽  
Crack Tip ◽  
Stress Intensity Factor Range ◽  
Crack Tip Opening Displacement ◽  
Element Analysis ◽  
Element Simulation

Finite element simulation of stable fatigue crack growth using critical crack tip opening displacement (CTOD) was done. In the preliminary finite element simulation without crack growth, the critical CTOD was determined by monitoring the ratio between the displacement increments at the nodes above the crack tip and behind the crack tip in the neighborhood of the crack tip. The critical CTOD was determined as the vertical displacement at the node on the crack surface just behind the crack tip at the maximum ratio. In the main finite element simulation with crack growth, the crack growth rate with respect to the effective stress intensity factor range considering crack closure yielded more consistent result. The exponents m in the Paris law were determined.

The Vibration Characteristics Analysis of Miter Gate Based on ANSYS Workbench and Vibration Test

2013 ◽  
Vol 380-384 ◽  
pp. 64-68
Author(s):  
Xin Ze Zhao ◽  
Rui Feng Wang ◽  
Jie Wang ◽  
Mei Yun Zhao
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Strain Distribution ◽  
Vibration Test ◽  
Stress And Strain ◽  
Static Structure ◽  
Skeleton Model ◽  
Element Simulation ◽  
Stress And Strain Distribution ◽  
Ansys Workbench

The 3d model of miter gate has been set up based on skeleton model of Pro/E, and it has been imported into ANSYS Workbench module for static structure analysis and modal analysis. In the process of finite element simulation, the rotational constraints has been imposed on the top and bottom pivot according to the actual operation situation of the miter gate, and obtain the first several order frequencies and corresponding modal vibration mode of the miter gate, which can show the hydrodynamic vibration stress and strain distribution. According to the results of the finite element simulation analysis, the prototype vibration test of the miter gate has been done. The test results show that the vibration amplitude and the stress and strain distribution of each part of the miter gate are corresponding to the vibration test.

Finite Element Simulation and Comparison of Hydraulic Splitting Fracturing Test of Concrete

2014 ◽  
Vol 678 ◽  
pp. 551-555
Author(s):  
Xue Zhi Wang ◽  
Hao Fei Zou ◽  
Shu Wen Zheng ◽  
Yuan Li ◽  
Jun Yu Liu
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Mixed Mode ◽  
Failure Process ◽  
Crack Tip ◽  
Mixed Mode Fracture ◽  
Test Results ◽  
Mode Fracture ◽  
Element Simulation ◽  
Simulation Results

I-II mixed mode fracture under two kinds of load manners was carried out, and it was also simulated by the ANSYS, and the test results and the simulation results were compared and analyzed, and the reasonableness of the model built and the effectiveness of test were verified. The failure process of fracture under the loading could be judged through the development of the crack tip combined with the stress nephogram and strain nephogram when cracks initiation at crack tip, and it provided the basis for the crack damage judgment.

Finite Element Simulation of Crack Propagation Under Mixed Mode Loading Condition Using Element Removing Method

2007 ◽  
Vol 345-346 ◽  
pp. 501-504
Author(s):  
H.S. Kim ◽  
K.S. Kim ◽  
Young Seog Lee
Keyword(s):  
Finite Element ◽  
Crack Propagation ◽  
Finite Element Simulation ◽  
Crack Growth ◽  
Failure Criterion ◽  
Mixed Mode ◽  
Loading Condition ◽  
Crack Tip ◽  
Mixed Mode Loading ◽  
Element Simulation

In this study, we introduce an approach which simulates crack propagation under mixedmode loading condition. In comparison with the conventional element removing method which eliminates any element that satisfies a prescribed failure criterion near the crack tip, the present approach selects a set of elements ahead of the crack tip on the crack growth direction and removes them one by one when the element meets a prescribed failure criterion. Compact tension shear (CTS) specimens of type 304 stainless steel were used for failure testing. Finite element simulation has been carried out to simulate crack profiles and compared with observed ones. Results showed the proposed element removing algorithm is useful for crack growth simulation under mixed mode loading condition. The experimentally measured crack growth profile is in an agreement with the predicted ones.

Finite Element Simulation on Mechanical Behaviors near Crack-Tip in Shape Memory Alloy

2013 ◽  
Vol 405-408 ◽  
pp. 2576-2579
Author(s):  
Bo Zhou ◽  
Jun Lv ◽  
Dong Xue Wang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Finite Element Simulation ◽  
Crack Tip ◽  
Simulation Method ◽  
Mechanical Behaviors ◽  
Alloy Plate ◽  
Element Simulation

The mechanical behaviors of super-elastic shape memory alloy are formulated based on Auricchios constitutive model. The finite element simulation method for the mechanical behaviors of super-elastic shape memory alloy using the software of ANSYS is introduced. The mechanical behaviors near crack-tip in a shape memory alloy plate with one inclining crack are numerically simulated by finite element method. Results show that the software of ANSYS can simulate the mechanical behaviors of shape memory alloy with crack effectively.

Study on the Shape Distortion of Sheet Inner-Concave Flanging

2013 ◽  
Vol 774-776 ◽  
pp. 1186-1189 ◽  
Author(s):  
Ling Yun Zhang ◽  
Ze Sun
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Strain Distribution ◽  
Outer Edge ◽  
Shape Distortion ◽  
Element Simulation ◽  
Calculation Results ◽  
Simulation Results ◽  
The Law

In this paper, through analysed the strain and stress of sheet inner-concave flanging and observed result of finite element simulation, the law of strain distribution in outer edge area of deformation.By simplified the distributed regularity, a method to predict the shape distortion of outer edge area of deformation was obtained, the calculation results and the finite element simulation results are nearly equal to each other.

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