scholarly journals Single Track Laser Surface Hardening Model for AISI 4340 Steel Using the Finite Element Method

2016 ◽  
Vol 06 (02) ◽  
pp. 17-27 ◽  
Author(s):  
Ahmed Ghazi Jerniti ◽  
Abderazzak El Ouafi ◽  
Noureddine Barka
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Surface Hardening ◽  
Laser Surface ◽  
Single Track ◽  
The Finite Element Method ◽  
Aisi 4340 Steel ◽  
Hardening Model ◽  
4340 Steel ◽  
Laser Surface Hardening

Failure Analysis of the Restraining System of the Directional Rudder of an MD80 Aircraft

2018 ◽  
Vol 774 ◽  
pp. 77-83
Author(s):  
J. Coronado ◽  
K. Mendoza ◽  
M. Martinez
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Failure Analysis ◽  
Service Condition ◽  
Hydraulic Cylinder ◽  
Alloying Elements ◽  
The Finite Element Method ◽  
Aisi 4340 Steel ◽  
4340 Steel ◽  
Main Component

The directional rudder travel of an aircraft must be restricted as the speed in flight increases, this in order to decrease its sensitivity, thus avoiding maneuverability problems or overloads that could result in a break in the vertical stabilizer and cause an accident. aerial. The aircraft MD 80 have a system of restriction of the route of the directional rudder, whose main component, the hook, is the piece in charge of stopping the movement as it is introduced in the piston rod of the hydraulic cylinder that governs the movement of the rudder. In this work, the causes of the hook fractured that left the directional mechanism out of service is analyzed. In order to carry out the work, the manufacturing material of the piece was first characterized, doing the analysis of its microstructure and alloying elements, it was obtained that it has the typical characteristics of an AISI 4340 steel. Subsequently, the loads acting on the piece in service condition and the initiation of the crack route were determined. Then, the fatigue study was carried out through simulations using the finite element method. The results were that the piece failed due fatigue due to a superficial defect.

scholarly journals Identification of elastic-plastic behavior in AHSS using the isotropic hardening model by the finite element method and EBSD

2019 ◽  
Vol 6 (5) ◽  
pp. 649-658
Author(s):  
Érika Aparecida da Silva ◽  
Marcelo dos Santos Pereira ◽  
Jean Pierre Faye ◽  
Rosinei Batista Ribeiro ◽  
Nilo Antonio de Sousa Sampaio ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Isotropic Hardening ◽  
Plastic Behavior ◽  
The Finite Element Method ◽  
Hardening Model ◽  
Elastic Plastic ◽  
Element Method

scholarly journals Temperature Modeling of AISI 1045 Steel during Surface Hardening Processes

Materials ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 1815 ◽  
Author(s):  
Tsung-Pin Hung ◽  
Hao-En Shi ◽  
Jao-Hwa Kuang
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Surface Hardening ◽  
Treatment Process ◽  
Scanning Speed ◽  
Element Model ◽  
Laser Surface ◽  
Single Track ◽  
Proposed Model ◽  
Aisi 1045

A Coupled thermo-mechanical finite element model was employed to simulate the possible effects of varying laser scanning parameters on the surface hardening process for AISI 1045 and AISI 4140 steels. We took advantage of the high-power density of laser beams to heat the surface of workpieces quickly to achieve self-quenching effects. The finite element model, along with the temperature-dependent material properties, was applied to characterize the possible quenching and tempering effects during single-track laser surface heat treatment. We verified the accuracy of the proposed model through experiments. The effects of laser surface hardening parameters, such as power variation, scanning speed, and laser spot size, on the surface temperature distribution, hardening width, and hardening depth variations during the single-track surface laser treatment process, were investigated using the proposed model. The analysis results show that laser power and scanning speed are the key parameters that affect the hardening of the material. The numerical results reveal that the proposed finite element model is able to simulate the laser surface heat treatment process and tempering effect of steel.

Simulation of tuning graphene plasmonic behaviors by ferroelectric domains for self-driven infrared photodetector applications

Nanoscale ◽  
2019 ◽  
Vol 11 (43) ◽  
pp. 20868-20875 ◽  
Author(s):  
Junxiong Guo ◽  
Yu Liu ◽  
Yuan Lin ◽  
Yu Tian ◽  
Jinxing Zhang ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Interfacial Effect ◽  
Infrared Photodetector ◽  
The Finite Element Method ◽  
Ferroelectric Domains ◽  
Element Method

We propose a graphene plasmonic infrared photodetector tuned by ferroelectric domains and investigate the interfacial effect using the finite element method.

Sign in / Sign up

Export Citation Format

Share Document