scholarly journals Finite Element Simulation Study of Ultrasonic Vibration-Assisted Tensile High-Volume Fraction SiCp/Al Composite

Materials ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 3841 ◽  
Author(s):  
Zhang ◽  
Xiang ◽  
Wu ◽  
Feng ◽  
Shi ◽  
...  
Keyword(s):  
Finite Element ◽  
Tensile Strength ◽  
Finite Element Simulation ◽  
Ultrasonic Vibration ◽  
Stress Reduction ◽  
Volume Fraction ◽  
Aluminum Matrix ◽  
High Volume ◽  
Experimental Results ◽  
Element Simulation

Silicon carbide particle-reinforced aluminum matrix composite (SiCp/Al) has been widely used in the military and aerospace industry due to its special performance; however, there remain many problems in the processing. The present paper introduces an ultrasonic vibration tensile apparatus and a composite tensile specimen and performs Abaqus finite element simulation on high-volume SiCp/Al. The results show that the stress-strain curve increases linearly during conventional tensile strength; the intermittent vibration tensile strength is similar to the full course vibration tensile strength: The magnitude of the stress reduction increases as the amplitude of the ultrasound increases and the vibration frequency increases. The tensile rate is inversely proportional to the magnitude of the stress reduction, and in the ultrasonic parameters, the amplitude has the greatest influence on the magnitude of the stress reduction, followed by the tensile rate; additionally, the frequency has the least influence on the magnitude of the stress reduction. The experimental results show that the simulation results are consistent with the experimental results.

Eddy Current Testing Probe to Improve the Defect Detection Sensitivity of Metal Tube

2014 ◽  
Vol 945-949 ◽  
pp. 1987-1990
Author(s):  
Si Quan Zhang ◽  
Yu Liu ◽  
Hao Jun Xu ◽  
Chang Yin
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Defect Detection ◽  
Eddy Current ◽  
Experimental Results ◽  
Detection Sensitivity ◽  
Metal Tube ◽  
Current Testing ◽  
Element Simulation ◽  
Axial Defects

The structure of conventional bobbin probe was modified to improve the detection sensitivity of defects in metal tube. Based on the results of finite element simulation, several types of modified probes are fabricated and used to detect artificial defects in tube and the defect signals are acquired and analyzed. The simulation and experimental results verified that the modified eddy current probes are more sensitive to non-axial defects than conventional bobbin probe and can improve the reliability of tube inspection.

Local Approach of Fracture in the Ductile Regime and Application to VVER Materials

2002 ◽  
Author(s):  
B. Z. Margolin ◽  
V. I. Kostylev ◽  
E. Keim ◽  
R. Chaouadi
Keyword(s):  
Finite Element ◽  
Crack Resistance ◽  
Ductile Fracture ◽  
Finite Element Simulation ◽  
Volume Fraction ◽  
Stress Triaxiality ◽  
Local Approach ◽  
Gurson Model ◽  
Element Simulation

Within the TACIS R2.06/96 project: “Surveillance Program for VVER 1000 Reactors”, sponsored by the European Commission, the local approach of fracture has been applied in the ductile regime. Two different models were applied and compared, namely Tvergaard-Needleman-Gurson versus Prometey model. The main tasks are: • perform special Local Approach experiments on smooth and notched cylindrical specimens; • predict JR-curve on the basis of the ductile fracture models; • compare two models of ductile fracture, namely, the Tvergaard-Needleman-Gurson model and the Prometey model. In this paper, the Tvergaard-Needleman-Gurson and Prometey models are briefly described. The parameters of both models were calibrated by using experimental data obtained on tensile specimens. While only smooth tensile specimens are used to calibrate the Tvergaard-Needleman-Gurson model, notched tensile in addition to smooth tensile specimens are used to calibrate the Prometey model. In the latter, standard smooth tensile specimens are used to determine the mechanical properties (the yield stress σy, the ultimate stress σu, the ultimate elongation δu, the area reduction Z) and notched cylindrical specimens to determine the strain at rupture. The numerical analysis comprises essentially two steps: • Step 1: finite element simulation of the smooth tensile specimen (determination of true stress-strain curve and critical void volume fraction for the Tvergaard-Needleman-Gurson model) and simulation of the notched cylindrical specimen up to rupture (determination of stress triaxiality for the Prometey model); • Step 2: finite element simulation of the 2T CT specimen and determination of the crack resistance behaviour in the ductile regime (J-Δa curve). It is found that both models were able to correctly predict the crack resistance behaviour of the investigated materials. The numerical and the experimental results were in very good agreement. The main difference between the two models is that the required number of calibrated parameters in the Prometey model is less than in the Tvergaard-Needleman-Gurson model but additional tests on notched specimens are required for the Prometey model.

Investigation of thermal properties of spacer fabrics with phase changing material by finite element model and experiment

2020 ◽  
Vol 90 (15-16) ◽  
pp. 1837-1850 ◽  
Author(s):  
Rimantas Barauskas ◽  
Audrone Sankauskaite ◽  
Vitalija Rubeziene ◽  
Ausra Gadeikyte ◽  
Virginija Skurkyte-Papieviene ◽  
...  
Keyword(s):  
Finite Element ◽  
Phase Change ◽  
Specific Heat ◽  
Finite Element Simulation ◽  
Phase Change Material ◽  
Phase Change Materials ◽  
Experimental Results ◽  
Finite Element Models ◽  
Element Simulation ◽  
Change Material

This study presents the developed computational finite element models for transient heat transfer analysis in fabrics enriched by phase change materials along with efforts to provide validation on the basis of obtained experimental results. The environment-friendly butyl stearate is used as a phase change material. Its melting/heating absorption takes place in temperature range from 19℃ to 34℃, and the solidification/heat release occurs from 34℃ to 19℃. An important aspect in this analysis is the investigation of appropriateness of the material samples dimensions selected for effective heat capacity against temperature measurements. For this purpose, we used the combined experimental and finite element simulation-based analysis. A similar computational procedure enabled us to estimate the effective latent specific heat relationship of the fabric with phase change materials coating. The direct usage of differential scanning calorimetry (DSC) measurement-based specific heat relationships against temperature in the finite element models ensured good compliance of the computed results with the experiment. For validation of the developed computational models the infrared radiation heating-cooling experiments on fabrics with different deposits of a phase change material were performed. The noticeable influence of content of phase change materials for transient thermal behavior during heating-cooling cycles was determined. The experimental results have been compared against the finite element simulation results.

Test of Metal Material Fracture Toughness by Finite Element Simulation and Moire Interferometry

2012 ◽  
Vol 217-219 ◽  
pp. 2322-2327
Author(s):  
Yong Dong Wu ◽  
Yuan Shuai Guo ◽  
He Li
Keyword(s):  
Fracture Toughness ◽  
Finite Element ◽  
Finite Element Simulation ◽  
Moiré Interferometry ◽  
Experimental Results ◽  
Moire Interferometry ◽  
Metal Material ◽  
Element Simulation ◽  
Alloy Material ◽  
Material Fracture

In this paper,Fracture Toughness of TC11 alloy material at normal temperature is found out by Finite Element Simulation and Moire Interferometry. The feasibility and veracity of Finite Element Simulation is shown by comparing numerical and experimental results.

Sign in / Sign up

Export Citation Format

Share Document