Showing posts with label Metal. Show all posts
Showing posts with label Metal. Show all posts

Tuesday, 7 June 2022

Modelling Orthogonal Metal Machining Using Finite Element Analysis | Chapter 13 | Technological Innovation in Engineering Research Vol. 3

The findings of a research of simulation modelling of orthogonal metal machining using the finite element method and AdvantEdgeTM modelling software are presented in this article. The AdvantEdgeTM is a certified CAE software solution for metal cutting optimization that allows users to examine machining operations in both 2D and 3D settings. By progressively moving the cutting tool from the beginning state to steady-state, the cutting process and primarily cutting forces were simulated, while a geometrical chip-separation criterion based on a critical distance at the tool tip criterion was implemented in the AdvantEdgeTM engine. The study's goal was to use the finite element approach to estimate cutting forces, chip formation, and temperature at the tool-chip interface in order to model the cutting process. Friction was simulated and executed along the tool-chip contact using a series of finite element simulations. In order to simulate chip detachment from the workpiece, a finite element nodal technique was used. These simulations yielded results that matched experimental findings. Specifically, it was discovered that during machining, the tool-tip zone experiences the greatest plastic strain rate deformation. Maximum temperature increases were discovered to have occurred along the chip-tool contact as a result of energy dissipation owing to plasticity and friction.


Author(s) Details:

Titus Bitek Watmon,
Department of Agricultural Mechanisation & Irrigation Engineering, Busitema University, P.O. Box 236, Tororo, Uganda.

David Xiao,
School of Architecture Computing and Engineering, University of East London, Docklands Campus, E16 2RD, United Kingdom.

Please see the link here: https://stm.bookpi.org/TIER-V3/article/view/7071

Thursday, 27 May 2021

Early Loaded Single Implant Reinforced Mandibular Overdenture: A Case Report | Chapter 12 | Highlights on Medicine and Medical Research Vol. 10

 For implant retained removable overdentures in the mandible, rehabilitating atrophied mandible with two-implant supported dentures is a frequent therapeutic option. This research attempts to design a treatment modality for a severely atrophied mandibular ridge using a single implant reinforced overdenture with an early loading strategy. Single implant overdentures can be a more cost-effective and less intrusive treatment option than two-implant retained overdentures. According to research, a single implant mandibular overdenture considerably improves the satisfaction and quality of life of edentulous individuals. The most common complication associated with single implant and two-implant retained mandibular overdentures is midline fracture of the prosthesis. To address this issue, a thin metal mesh is employed to support the overdenture while also making the prosthesis lighter and less expensive than traditional cast metal framework.

Author(s) Details

K. Nischal
Department of Prosthodontics, Raja Rajeswari Dental College and Hospital, Bangalore 560074, India.

R. Chowdhary
Department of Prosthodontics, Raja Rajeswari Dental College and Hospital, Bangalore 560074, India.

View Book :- https://stm.bookpi.org/HMMR-V10/article/view/1123

Tuesday, 17 November 2020

Tribological Characteristics of Metallic Counterparts under Ultrasonic Elliptical Vibration | Chapter 3 | New Ideas Concerning Science and Technology Vol. 2

 Wear behaviour is important for enhancing the friction drive and wear lifetime of actuators or motors that operate with elliptical ultrasonic vibration. In particular, efficient friction-drive and long-lasting wear-life are critical for ultrasonic motor service efficiency, particularly for standing-wave ultrasonic motors, where the drive tip on the slider is in intermittent contact, followed by impact effects. A laboratory rig of ultrasonic vibration performs sliding wear tests of metallic friction pairs to investigate wear mechanisms of metallic driving and driven components. Using surface roughness, Abbott curves and fractal proportions, the surfaces of the various metallic sliders are characterised. Results show that, due to ultrasonic polishing and/or micro-rolling effect, surface roughness is reduced to varying degrees in the metallic sliders. Variations in the fractal dimensions of contact surfaces correspond to the roughness of the surface. Wear traces show that the key failure modes are plastic deformation and cracking. Ripples of 3~5 μm traces indicate the presence of fretting in duralumin sliders when the driving tip on the slider is in sporadic touch accompanied by impact results. During the operation of the ultrasonic motor, nodular cast iron demonstrated a favourable efficiency, showing a stable output performance and robust wear life.


Author(s) Details

Yanhu Zhang
Institute of Advanced Manufacturing and Modern Equipment Technology, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, P.R. China.

Jianjun Qu
School of Mechatronics Engineering, Harbin Institute of Technology, 92 West Dazhi Street, Harbin 150001, P. R. China.

Hongxiang Wang
School of Mechatronics Engineering, Harbin Institute of Technology, 92 West Dazhi Street, Harbin 150001, P. R. China.

View Book :-
https://bp.bookpi.org/index.php/bpi/catalog/book/320