Study on Thermal Stresses of Cylinder Liner’s Fabrication Using FEM Analysis

2011 ◽  
Vol 189-193 ◽  
pp. 2058-2061
Author(s):  
Zi Qian Huang ◽  
Qing Lian Xie
Keyword(s):  
Temperature Gradient ◽  
Thermal Stresses ◽  
Cylinder Liner ◽  
Fem Analysis ◽  
Von Mises Stress ◽  
Surface Zone ◽  
Cooling Speed ◽  
Quality Of Products ◽  
Von Mises

In the process of casing casting, great temperature gradient leads to contraction deformation of cylinder liner, which influences the quality of products. The thermal stresses caused by temperature gradient were analyzed by finite element method. The numerical results show that high equivalent Von Mises stress(242MPa) occurs in the surface zone of the cylinder liner as Cooling down to room temperature within pipe die ,also there is plastic deformation in the internal and external surface zone. Reducing the cooling speed, decreasing the temperature gradient and aging can reduce the influence of thermal stresses.

scholarly journals UNCONVENTIONAL MATERIAL PART FEM ANALYSIS

2016 ◽  
Vol 2 (1) ◽  
pp. 20-25
Author(s):  
Michal Tropp ◽  
Michal Lukac
Keyword(s):  
3D Model ◽  
Fem Analysis ◽  
Carbon Composite ◽  
Von Mises Stress ◽  
Composite Component ◽  
Fem Model ◽  
Material Part ◽  
Alternative Materials ◽  
Von Mises ◽  
Ansys Workbench

The article covers the usability of alternative materials in vehicle construction. The paper elaborates upon the setup of the process and analysis of the results of the carbon composite component FEM model. The 3D model, used for the examination, is a part of axle from an alternative small electric vehicle. The analysis was conducted with the help of MSC Adams and Ansys Workbench software. Color maps of von Mises stress in material and total deformations of the component are the results of calculation.

Thermal-Mechanical Study of 3D Printing Technology for Rail Repair

2018 ◽  
Author(s):  
Ershad Mortazavian ◽  
Zhiyong Wang ◽  
Hualiang Teng
Keyword(s):  
Thermal Analysis ◽  
Thermal Expansion ◽  
3D Printing ◽  
Stress Distribution ◽  
Temperature Gradient ◽  
Initial Temperature ◽  
Mechanical Analysis ◽  
Von Mises Stress ◽  
Additive Materials ◽  
Von Mises

The complicated steel wheel and rail interaction on curve causes side wear on rail head. Thus, the cost of maintenance for the track on curve is significantly higher than that for track on a tangent. The objective of this research is to develop 3D printing technology for repairing the side wear. In this paper, the study examines induced residual thermal stresses on a rail during the cooling down process after 3D printing procedure using the coupled finite volume and finite element method for thermal and mechanical analysis respectively. The interface of the railhead and additive materials should conserve high stresses to prevent any crack initiation. Otherwise, the additive layer would likely shear off the rail due to crack propagation at the rail/additive interface. In the numerical analysis, a cut of 75-lb ASCE (American Society of Civil Engineers) worn rail is used as a specimen, for which a three-dimensional model is developed. The applied residual stresses, as a result of temperature gradient and thermal expansion coefficient mismatch between additive and rail materials, are investigated. At the beginning, the worn rail is at room temperature while the additive part is at a high initial temperature. Then, additive materials start to flow thermal energy into the worn rail and the ambient. The thermal distribution results from thermal analysis are then employed as thermal loads in the mechanical analysis to determine the von-Mises stress distribution as the decisive component. Then, the effect of preheating on residual stress distribution is studied. In this way, the thermo-mechanical analysis is repeated with an increase in railhead’s initial temperature. In thermal analysis, the temperature contours at different time steps for both the non-preheated and preheated cases indicate that preheating presents remarkably lower temperature gradient between rail and additive part and also represents a more gradual cooling down process to allow enough time for thermal expansion mismatch alignment. In mechanical analysis, the transversal von-Mises stress distribution at rail/additive interface is developed for all cases for comparison purposes. It is shown that preheating is a key factor to significantly reduce residual stresses by about 40% at all points along transversal direction of interface.

Stress Research and Finite Element Analysis of Pile Clamping Mechanism of Hydraulic Static Pile Driver

2014 ◽  
Vol 908 ◽  
pp. 310-314
Author(s):  
Jun Ping Hu ◽  
Hua Dong Zhu ◽  
Ke Jun Li
Keyword(s):  
Parametric Design ◽  
Simulation Analysis ◽  
Displacement Vector ◽  
Von Mises Stress ◽  
Pile Driving ◽  
Element Analysis ◽  
Working Principle ◽  
Von Mises ◽  
Vector Sum

For decreasing the stress and displacement of pile clamping mechanism of hydraulic static pile drivers in the process of pile driving, optimizing the pile clamping mechanism and improving quality of pile driving, the working principle of pile clamping and pile driving were introduced briefly. The parametric model of pile clamping mechanism was constituted in ANSYS; the main parameters of the model were set. The command-flow was programmed with APDL standing for ANSYS parametric design language. And then the serialization simulation analysis of pile clamping mechanism was achieved; the cloud diagram of Von Mises stress and the maximal Von Mises stress and displacement vector sum of pile clamping mechanism were elicited. The simulation results were analyzed.

Evaluation of Fatigue Endurance Foran Ultra Lightweight Inline Skate Frame

2013 ◽  
Vol 739 ◽  
pp. 431-436
Author(s):  
Ho Kyung Kim
Keyword(s):  
Stress Analysis ◽  
Tensile Properties ◽  
Fatigue Limit ◽  
Endurance Limit ◽  
Fem Analysis ◽  
Fatigue Tests ◽  
Von Mises Stress ◽  
Al 7075 ◽  
Von Mises ◽  
Fatigue Endurance

In order to evaluate the fatigue endurance for an ultra lightweight inline skate frame, FEM analyses was performed. The tensile properties and an S-N curve were determined through tensile and fatigue tests on a modified Al-7075+Sc alloy. The yield and ultimate tensile strengths were 553.3 MPa and 705.5 MPa, respectively. The fatigue endurance limit of this alloy was 201.2 MPa. To evaluate the fatigue endurance of the inline skate frame, the S-N data were compared with the stress analysis results through FEM analyses of the frame. The maximum von Mises stress of the frame was determined to be 106 MPa through FEM analysis of the frame, assuming that the skater weight is 75 kg. Conclusively, on the basis of the fatigue limit, the inline skate frame has a safety factor of approximately 2.0.

The evaluation of von Mises stress field in bonded tiling ceramics as function of the elastic modulus of the tile-adhesive and joint grout mortars

2020 ◽  
pp. 146442072096736
Author(s):  
Luis Silva ◽  
Pedro Sequeira ◽  
Francisco Melo ◽  
Carla V Lopes
Keyword(s):  
Elastic Modulus ◽  
Temperature Gradient ◽  
External Surface ◽  
Von Mises Stress ◽  
Thermal Source ◽  
Internal Layers ◽  
Temperature Field Distribution ◽  
Stress Criterion ◽  
Joint Width ◽  
Von Mises

The application of ceramic elements in exterior environments such as facades and floors is a common practice, even when more compliant supports are applied. Such conditions naturally conduct to significant stress increase at the level of the system bonding of ceramic elements. For example, thermal differential expansions in the different materials as result of the temperature gradient from the external surface up to internal layers can build-up stresses at the interfaces, in a magnitude level in excess of the bonding stresses binding them. A proposed finite element modeling was applied in previous works, in which the temperature field distribution from the origin of the thermal source induces a temperature variation carried out incrementally in the simulation. A temperature gradient is assumed from the exposed face, through the elements interfaces until the internal ceramic-adhesive mass. Using the same numerical model, this research led to the evaluation of the equivalent von Mises thermal stress criterion. Adopting different elastic modulus combinations for the tile adhesive and the joint grout, it is recognized how much this property can impact the final stresses and contribute to the best option about the field of application. In fact, independently from the adopted conditions, it is shown that best joint performance is particularly achieved when elastic modulus of the joint grout has lower values, such as 0.1 GPa. On another hand, other key parameters are also very relevant, as the case of the joint width and the support rigidity level.

Material characterization of tribological effects in HSS hacksaw blade

2017 ◽  
Vol 69 (3) ◽  
pp. 355-362
Author(s):  
Nor Amirah binti Mohd Amran ◽  
Mohd Sayuti bin Ab Karim ◽  
Rusdi bin Abd Rashid ◽  
Waleed Alghani ◽  
Nur Aqilah binti Derahman
Keyword(s):  
Mechanical Properties ◽  
High Speed ◽  
High Speed Steel ◽  
Hardness Test ◽  
Vital Role ◽  
Von Mises Stress ◽  
Content Type ◽  
Cultural Aspects ◽  
Von Mises

Purpose This study aims to present a direct repurposing activity of consumed high-speed steel (HSS) hacksaw blade into fine-looking handmade knives to increase the awareness about sustainability by evaluating the relationship between the quality of material alloys and heat treatment as well as cultural aspects such as the treatment on the HSS hacksaw blade that will affect the material hardness. Design/methodology/approach The quality of HSS hacksaw blade samples was analyzed by using scanning electron microscope/energy dispersive X-Ray spectroscopy (SEM/EDX) through the identification of material element’s properties. Besides, finite element structural analysis was performed by using SolidWorks Simulation to evaluate the material performance by determining the Von Mises stress to find the factor of safety of the knife designs. Then, the effect of tribology implementation toward mechanical properties of the handmade knives was determined by using a Rockwell C hardness test. Findings It is found that the material composition of carbon plays a vital role in increasing and improving the hardness and wear resistance of the HSS hacksaw blade. The Von Mises stress obtained is lower than the yield strength of 3,250 MPa by 71.44 per cent with the safety factor of 3.58,which means the design will not be subjected to failure. The mechanical properties of the HSS hacksaw blade such as hardness were determined averagely by 5 per cent of hardness increase. Originality/value It has been validated that the tribological effect toward the material characteristic leads to hardness changes which contributed to the enhancement of tool life of the HSS hacksaw blade, thus producing better quality knives.

Comparison of the Stress-Strain Behaviour of Cast TiAl6V4, Porous TiAl6V4 and Cortical Bone during the Mechanical Load Caused by Common Daily Activities

2014 ◽  
Vol 980 ◽  
pp. 127-131
Author(s):  
Miroslav Kvíčala ◽  
Michaela Štamborská ◽  
Jaromír Drápala
Keyword(s):  
Cortical Bone ◽  
Mechanical Load ◽  
Meta Analysis ◽  
Fem Analysis ◽  
Daily Activities ◽  
Von Mises Stress ◽  
Human Cortical Bone ◽  
Strain Behaviour ◽  
Stress Concentration Factors ◽  
Von Mises

This paper deals with FEM analysis of six models that represents human cortical bone, cast TiAl6V4 alloy and porous TiAl6V4 with different pore diameters. Reliable data for the simulations were achieved by meta-analysis that consisted from 53 scientific works. Strain value was chosen with a respect to the frequent daily activities such as walking. According to the FEM analysis of presented models von Mises stress values and stress concentration factors were similar for human cortical bone and porous TiAl6V4.

Thermo-mechanical characteristics of the stretchable serpentine-patterned microelectrode

2018 ◽  
Vol 11 (03) ◽  
pp. 1850054 ◽  
Author(s):  
Myoungwoo Lee ◽  
Hyun-Oh Kim ◽  
Jin-Hyo Boo ◽  
Youn-Jea Kim
Keyword(s):  
Thermal Stress ◽  
Mechanical Characteristics ◽  
Von Mises Stress ◽  
Comsol Multiphysics ◽  
Structural Quality ◽  
Wearable Electronics ◽  
Stress Distributions ◽  
Commercial Code ◽  
Von Mises

Stretchable microelectrode is applied in various fields, such as sensory skins for soft robotics and wearable electronics for biomedical patches, etc. The structural quality of the stretchable microelectrode is a significant factor since it influences the thermo-mechanical characteristics. In order to improve the structural quality of the electrode, a serpentine-patterned configuration with various curvature angles of 60[Formula: see text], 90[Formula: see text] and 120[Formula: see text] were applied to the film of each electrode. In addition, thermal stress was applied at certain voltages to demonstrate the thermo-mechanical characteristics of the serpentine-patterned microelectrode. The numerical analysis on von Mises stress and thermal stress of the electrode was conducted with a commercial code, COMSOL Multiphysics ver. 5.3a. The results were graphically described by showing stress distributions of each case and the microelectrode having highest thermo-mechanical characteristics was derived.

scholarly journals Finite Element Analysis of Cornea and Lid Wiper During Blink, With and Without Contact Lens

2020 ◽  
Author(s):  
Vivek R ◽  
Meenatchi S ◽  
Rinu Thomas ◽  
Ramesh Ve ◽  
Raghuvir Pai ◽  
...  
Keyword(s):  
Finite Element ◽  
Contact Lens ◽  
Element Model ◽  
Biomechanical Properties ◽  
Von Mises Stress ◽  
Element Analysis ◽  
Biomechanical Changes ◽  
Von Mises

Abstract Contact Lens-related Discomfort (CLD) is one of the major problems in about 50% of contact lens users. It is a symptom of a variety of conditions such as Lid Wiper Epitheliopathy (LWE), Superior Epithelial Arcuate Lesion (SEAL), Limbal Stem Cell Deficiency (LSCD), Superior Limbic Keratoconjunctivitis (SLK) and dry eye disease; which affect the quality of life. Hence, it is essential to investigate the underlying cause of CLD. During a blink, the under surface of the eyelid tends to interact with the cornea and the conjunctiva. The presence of a contact lens can add to the biomechanical changes on these surfaces. To estimate these changes with and without a contact lens, a Finite Element Model (FEM) of the eyelid wiper, eyeball and contact lens was developed using COMSOL Multiphysics®. Biomechanical properties such as von Mises stress and displacement were calculated. Our study concluded that large stress formed in the lid wiper could be the reason for the occurrence of LWE and SLK without contact lens in the eye. When the contact lens was in situ, large stress was found in the superior 1.3mm of the cornea which could be responsible for the development of SEAL and superior LSCD.

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