scholarly journals Edge-chipping reduction in rotary ultrasonic machining of ceramics: Finite element analysis and experimental verification

2006 ◽  
Vol 46 (12-13) ◽  
pp. 1469-1477 ◽  
Author(s):  
Z.C. Li ◽  
Liang-Wu Cai ◽  
Z.J. Pei ◽  
C. Treadwell
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Experimental Verification ◽  
Ultrasonic Machining ◽  
Rotary Ultrasonic Machining ◽  
Element Analysis ◽  
Edge Chipping ◽  
Machining Of Ceramics

Investigations on Edge Chipping in Rotary Ultrasonic Machining Using Finite Element Analysis

2006 ◽  
Vol 532-533 ◽  
pp. 969-972 ◽  
Author(s):  
Yu Chen ◽  
Zhi Jian Pei ◽  
Clyde Treadwell
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Cutting Force ◽  
Ultrasonic Machining ◽  
Rotary Ultrasonic Machining ◽  
Cutting Depth ◽  
Element Analysis ◽  
Edge Chipping ◽  
Support Length

This paper reports two investigations on the edge chipping in rotary ultrasonic machining using finite element analysis (FEA). The first FEA investigation establishes a relationship between edge chipping thickness and cutting force. The second FEA investigation is to understand the effects of three parameters (cutting depth, support length, and pre-tightening load) on edge chipping thickness. The investigation results showed that the edge chipping thickness could be reduced by increasing support length and decreasing cutting force.

Bionic research on spikes based on the tractive characteristics of ostrich foot toenail

SIMULATION ◽  
2020 ◽  
Vol 96 (9) ◽  
pp. 713-723
Author(s):  
Rui Zhang ◽  
Dianlei Han ◽  
Guolong Yu ◽  
Haitao Wang ◽  
Haibao Liu ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Experimental Verification ◽  
Athletic Performance ◽  
Slope Angle ◽  
Element Analysis ◽  
Single Structure ◽  
Athletic Shoes ◽  
Mechanical Information

Inspired by the superior fixed and traction characteristics of ostrich foot toenails, we devised, optimized and manufactured the single structure and group arrangement of a new-style bionic spike for sprint shoes to improve athletic performance. The tractive performance of the bionic spike was tested by finite element analysis and experimental verification. The optimized single structure of the bionic spike had a top slope angle of 13° and the radius of the medial groove of 7.3 mm. Compared with the conventional conic spike, the maximal and stable extrusion resistances of the single bionic spike decreased by about 25% and 40% respectively, while the maximal and stable horizontal thrusts increased by about 16% and 10%, respectively. In addition, the arrangement of the bionic spikes was also optimized. Compared with the conventional spike group, the maximal and stable extrusion resistances of the bionic spike group decreased by 11.0% and 6.2%, respectively, while the maximal and stable horizontal thrusts increased by 20.0% and 16.0%, respectively. The current results may provide useful mechanical information that can help develop a better design of athletic shoes with the potential for advanced performance.

Study on the Reduction Strategy of Machining-Induced Edge Chipping Based on Finite Element Analysis of In-Process Workpiece Structure

2013 ◽  
Vol 135 (1) ◽  
Author(s):  
Hu Gong ◽  
F. Z. Fang ◽  
X. F. Zhang ◽  
Juan Du ◽  
X. T. Hu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Principal Stress ◽  
Maximum Principal Stress ◽  
Machining Process ◽  
Element Analysis ◽  
Edge Chipping ◽  
Additional Support ◽  
The Relationship ◽  
Complex Parts

Edge chipping is one of the most serious issues during machining process of brittle materials. To find an effective method to reduce edge chipping, the relationship between the distribution of maximum principal stress and edge chipping is studied comprehensively based on 3D finite element analysis (FEA) model of in-process workpiece structure in this paper. Three-level influencing factors of edge chipping are proposed, which are helpful to understand the relationship between intuitive machining parameters and edge chipping at different levels. Based on the analysis, several experiments are designed and conducted for drilling and slotting to study the strategy of controlling edge chipping. Two methods are adopted: (a) adding additional support, (b) improving tool path. The result show that edge chipping can be reduced effectively by optimizing the distribution of the maximum principal stress during the machining process. Further, adding addtitional support method is extended to more complex parts and also obtain a good result. Finally, how to use adding additional support method, especially for complex parts, will be discussed in detail. Several open questions are raised for future research.

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