scholarly journals Tensile strength and thermal cycle analysis of AA6061 friction weld joints with different diameters and various friction times

2021 ◽  
Vol 2 (12 (110)) ◽  
pp. 15-21
Author(s):  
Yudy Surya Irawan ◽  
Moch Agus Choiron ◽  
Wahyono Suprapto
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Tensile Strength ◽  
Thermal Cycle ◽  
Flash Temperature ◽  
Element Analysis ◽  
Infrared Thermometer ◽  
Circular Bar ◽  
Different Diameters ◽  
Friction Weld

The paper reports measurement of tensile strength and the thermal cycle of AA6061 aluminum alloy circular bar friction weld with different diameters and various friction times. A continuous drive friction welding (CDFW) of AA6061 was conducted to weld the AA6061 circular bar with different diameters of 30 mm for the rotating part and 15 mm for the stationary part. The CDFW process was carried out with the revolution speed of 1,600 rpm, the initial compressive force of 2.8 kN during the friction stage for various friction times of 10, 12, and 14 seconds, and an upset force of 28 kN for 60 seconds. The flash temperature was measured using a digital infrared thermometer gun. Computer simulation using the finite element method was also done by coupling transient thermal and static structural methods. The flash temperature becomes higher along with increasing friction time based on the digital infrared thermometer gun measurement and finite element analysis. The results of tensile strength testing show that the specimen with a friction time of 12 seconds has the highest tensile strength. Based on the hardness testing result, it is found that the specimen with a friction time of 10 seconds has higher hardness, but it has an incomplete joint flash so that the tensile strength is lower than that of the specimen with a friction time of 12 seconds. Besides, the hardness of the specimen with a friction time of 12 seconds is higher than that of the specimen with a friction time of 14 seconds. The flash size becomes bigger along with the increase of the friction time based on the macrostructure observation on the longitudinal section of the CDFW specimen. It is confirmed by the temperature measurement and finite element analysis that the specimen with a friction time of 12 seconds has heat input to form the CDFW joint that has a maximum tensile strength in the range of this study

Fatigue surviving, fracture resistance, shear stress and finite element analysis of glass fiber posts with different diameters

2015 ◽  
Vol 43 ◽  
pp. 69-77 ◽  
Author(s):  
Vinícius Felipe Wandscher ◽  
César Dalmolin Bergoli ◽  
Ariele Freitas de Oliveira ◽  
Osvaldo Bazzan Kaizer ◽  
Alexandre Luiz Souto Borges ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Shear Stress ◽  
Glass Fiber ◽  
Fracture Resistance ◽  
Element Analysis ◽  
Fiber Posts ◽  
Glass Fiber Posts ◽  
Different Diameters

Material Parameter Identification of Viscoplastic Model for Solder Alloy in Electronics Package Using Bayesian Calibration

2010 ◽  
Author(s):  
Jinhyuk Gang ◽  
Jooho Choi ◽  
Bonghee Lee ◽  
Jinwon Joo
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Posterior Distribution ◽  
Thermal Cycle ◽  
Process Model ◽  
Computational Models ◽  
Likelihood Function ◽  
Material Parameter Identification ◽  
Bayesian Calibration ◽  
Element Analysis

In this study, a method of computer model calibration is applied to quantify the uncertainties arising in the material characterization of the solder joint in the microelectronics package subject to a thermal cycle. In this study, all uncertainties are addressed by using a Bayesian calibration approach. A special specimen that characterizes the solder property due to the shear deformation is prepared, from which the Moire´ fringe is measured by running a thermal cycle. Viscoplastic finite element analysis procedure is constructed for the specimen based on the Anand model. Gaussian process model known as Kriging is employed to approximate the original finite element analysis (FEA) model. Posterior distribution for the unknown Anand parameters is formulated from the likelihood function for joint full-field displacements of computation and experiment. Markov Chain Monte Carlo (MCMC) method is employed to simulate posterior distribution. As a result, the displacements are predicted in the form of confidence interval. The results show that the proposed approach can be a useful tool in the estimation of the unknown material parameters in a probabilistic manner by effectively accounting for the uncertainties due to the experimental and computational models.

Finite Element Analysis of Dynamic Splitting Tensile Mechanical Properties of Reinforced Concrete

2014 ◽  
Vol 941-944 ◽  
pp. 695-700
Author(s):  
Xiao Yan Song ◽  
Pei Wen Zhang
Keyword(s):  
Mechanical Properties ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Tensile Strength ◽  
Reinforced Concrete ◽  
Strain Rate ◽  
Failure Mode ◽  
Splitting Tensile Strength ◽  
Reinforcement Ratio ◽  
Element Analysis

Finite element analysis is carried out on the dynamic splitting tensile mechanical properties of reinforced concrete with LS-DYNA. The impact of strain rate and reinforcement ratio on the dynamic tensile strength and failure mode of reinforced concrete is considered in the calculation. The result shows that the form of reinforcement and reinforcement ratio has a greater impact on the failure mode and tensile strength of concrete. The dynamic splitting tensile strength of reinforced concrete has a certain strain rate effect and its splitting tensile strength increases with the strain rate; the splitting tensile strength of reinforced concrete also increases with its reinforcement ratio.

Evaluation of Stress in Tilted Implant Concept with Variable Diameters in the Atrophic Mandible: 3D Finite Element Analysis

2019 ◽  
pp. 0000-0000 ◽  
Author(s):  
Erdem Kilic ◽  
Ozge Doganay
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Longitudinal Axis ◽  
Von Mises Stress ◽  
Element Analysis ◽  
Short Implants ◽  
Dimensional Finite Element ◽  
Von Mises ◽  
Different Diameters ◽  
Tilted Implant

The beneficial mechanical properties provided by greater diameter or short implants increased their usage in the tilted implant concept. The aim of the present study is to compare the stress distribution of four different treatment models including variable implant numbers and diameters under static loading protocol in the atrophic mandible using 3-dimensional finite element analysis. Three models included two tilted and two vertical positioned implants with different diameters, whereas distally placed two short implants were added to the fourth model. The von Mises stress, maximum and minimum principal stress values were evaluated after applying 200N bilateral oblique loads to the first molar teeth with the inclination of 450 to the longitudinal axis. Tilted implants were associated with higher stress values when compared with vertical implants in all models. The lowest stress values were obtained in the fourth model including short implants. Although all stress values showed slight increases by descending implant diameters, the stress values of the model including implants with 3.3 mm diameter were within physiologic limits. All in all, increasing number or diameter of implants may have a positive effect on implant survival. In addition, when narrow diameter implants need to be inserted in the tilted implant concept, combination with short implants may be recommended for long term success.

scholarly journals Investigations of Mechanical Properties of API P110 Steel Casing Tubes Operated in Deep-Sea Sour Condensate Well Conditions

2020 ◽  
Vol 27 (3) ◽  
pp. 121-129
Author(s):  
Yao Zilin ◽  
Wang Yu ◽  
Yang Xuefeng ◽  
Gao Anping ◽  
Zhang Rong ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Tensile Strength ◽  
Yield Strength ◽  
Deep Sea ◽  
Performance Model ◽  
Continuous Change ◽  
Element Analysis ◽  
Equivalent Yield

AbstractDue to the complexity of the marine environment, in deep-sea drilling, all kinds of strings are corroded by different deep-sea conditions for a long time, accompanied by high temperature and high pressure, which lead to the continuous change of mechanical properties of materials. In order to solve the problem that the material mechanical parameters cannot be accurately described in the performance analysis of the casing, deep-sea simulated corrosion and material damage experiments of P110 material were carried out in this paper. Mass loss and tensile experiments on corrosion-damaged test pieces were conducted under different corrosion experimental periods. The changes in mechanical properties of the material were analyzed. Equations of the variation of the equivalent yield strength and the equivalent tensile strength were obtained. The results show that the equivalent yield strength and the equivalent tensile strength decrease with the increase of the weight loss rate. Based on the experimental results and finite element analysis, a method for establishing the material corrosion model was proposed in this paper. The deep-sea drilling corrosion performance model of P110 material was established, which greatly reduced the error caused by the material uniformity assumption in finite element analysis. This paper provides a theoretical basis for the analysis of reliability and life of P110 materials in wells.

Laser and plasma dental soldering techniques applied to Ti-6Al-4V alloy: Ultimate tensile strength and finite element analysis

2015 ◽  
Vol 113 (5) ◽  
pp. 460-466 ◽  
Author(s):  
Morgana G. Castro ◽  
Cleudmar A. Araújo ◽  
Gabriela L. Menegaz ◽  
João Paulo L. Silva ◽  
Mauro Antônio A. Nóbilo ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Element Analysis

Numerical investigation of the response of expansion anchors used to attach helical pile connectors to concrete foundations

2010 ◽  
Vol 37 (6) ◽  
pp. 866-877 ◽  
Author(s):  
M.M. El Sharnouby ◽  
M.H. El Naggar
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Tensile Strength ◽  
Numerical Investigation ◽  
Nonlinear Finite Element ◽  
Embedment Depth ◽  
Ultimate Capacity ◽  
Horizontal Movement ◽  
Element Analysis ◽  
Service Load

This paper evaluates the performance of expansion anchors used to attach helical pile connectors to foundations. The anchors’ response to pullout loads was evaluated using nonlinear finite element analysis with the aid of the commercial software, Abaqus. The connector capacity under horizontal movement of the foundation for different anchor diameters, embedment depths, and anchors’ spacing is reported. It was found that the pre-tension load had no influence on the anchor ultimate capacity, but affected the anchor response at service load levels and the displacement at failure. Under pullout loading, increasing the anchor diameter resulted in a more brittle response, but did not affect the ultimate capacity when the concrete tensile strength dominated the response. No interaction between anchors was observed for spacing ≥ 1.67 times the anchor’s embedment depth. A modification to the helical pile connector configuration is proposed.

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