Toughening mechanism of SIALON/Si2N2O multiphase ceramics and finite element simulation of stress field at crack tip

2019 ◽  
Vol 159 ◽  
pp. 194-201
Author(s):  
Junting Luo ◽  
Chenyang Xi ◽  
Yongfei Gu ◽  
Lili Zhang ◽  
Chunxiang Zhang ◽  
...  
Keyword(s):  
Finite Element ◽  
Stress Field ◽  
Finite Element Simulation ◽  
Crack Tip ◽  
Toughening Mechanism ◽  
Element Simulation ◽  
Multiphase Ceramics

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.

Finite Element Simulation of Molded Pulp Pallet in the Dropping Process

2013 ◽  
Vol 469 ◽  
pp. 209-212
Author(s):  
Xin Guo ◽  
Hong Wei Ji ◽  
Hai You Zheng
Keyword(s):  
Finite Element ◽  
Stress Field ◽  
Finite Element Simulation ◽  
Displacement Field ◽  
Green Material ◽  
Element Simulation ◽  
Development Prospects ◽  
Abaqus Software

Molded pulp pallet is a kind of new green material pallet which has a broad development prospects. In this paper, ABAQUS software was applied to simulate the situation that molded pulp pallet dropped from different heights in different ways. Stress field and displacement field of the pallet are obtained. Cushioning property and deformation of the molded pulp pallet were analyzed. The work of this paper could give a significant guide to design the molded pulp pallet.

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.

The Finite Element Simulation and Analysis of Thermal Stress Field of In-Service Tubular Electro-Thermal Component

2010 ◽  
Vol 171-172 ◽  
pp. 354-357
Author(s):  
Xiu Mei Zhang ◽  
Rui Ying Zhang ◽  
Quan Li
Keyword(s):  
Finite Element ◽  
Thermal Stress ◽  
Stress Field ◽  
Finite Element Simulation ◽  
Quartz Glass ◽  
Borosilicate Glass ◽  
Thermal Component ◽  
Element Simulation ◽  
Thermal Stress Field ◽  
Inner Surface

The tubular electro-thermal component will produce thermal stress when water in the tube is heated by electricity, which is one of important factors to cause the fracture. In this paper, the finite element simulation and theoretical analyzing methods are used to analyze the thermal stress field of the electro-thermal component tube with different substrates, i.e., quartz glass and borosilicate glass. The result shows that under the same condition, the highest temperature of electro-thermal component using borosilicate glass substrate is higher than that using quartz substrate. When in service, the inner surface of electro-thermal component endures tensile stress and the outer surface endures compressive stress. The inner surface produces greater thermal stress and therefore fracture is more likely to emerge on the inner surface. Therefore, in order to prevent forming of the fracture and reduce the thermal stress, compared with borosilicate glass, priority should be given to quartz glass as the material for manufacturing electro-thermal component.

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