The Study of Resonant Frequency of Horn and Circular Tool of Ultrasonic Milling System

2014 ◽  
Vol 628 ◽  
pp. 283-286
Author(s):  
Yun Dian Zhang ◽  
Zhong Qiu Ma
Keyword(s):  
Resonant Frequency ◽  
Analytic Method ◽  
Test Results ◽  
Honeycomb Core ◽  
Design Requirement ◽  
Network Method ◽  
Ultrasonic Milling ◽  
Nomex Honeycomb ◽  
Transition Type ◽  
Ansys Workbench

Based on the traditional analytic method and four-end network method, a tapered transition-type ultrasonic horn is designed and analyzed by ANSYS Workbench software. The composite horn avoids the limitations of single-horn and the resonant frequency of the horn is good to meet the design requirement. Through the ANSYS Workbench , the circular tool used for cutting the Nomex honeycomb core materials is analyzed. The test results shows that the resonant frequency of the circular tool is too small to meet the design requirement when the tool have a good modes. But after the optimize design by the Six Sigma in ANSYS Workbench, the resonant frequency of the tool is good for meeting the demands of the design and production and processing.

Properties of High Strength Fibre Reinforced Concrete Using Ultra Fine Slag

2016 ◽  
Vol 857 ◽  
pp. 183-188
Author(s):  
C. Mohan Lal ◽  
Vontary Sai Srujan Reddy
Keyword(s):  
High Strength Concrete ◽  
Steel Fibre ◽  
High Strength ◽  
Target Strength ◽  
Partial Replacement ◽  
Fibre Reinforced Concrete ◽  
Test Results ◽  
Design Requirement ◽  
Split Tensile Strength ◽  
Strength Concrete

High strength concrete has become a design requirement in recent years due to increase in number of infrastructure projects. This paper presents the effect of incorporating Ultra Fine Slag (UFS) and steel fibre to obtain high strength concrete. To achieve target strength of about 80 MPa, it is proposed to the replacement of cement of 10%, 20% and 30% with UFS and incorporating 0.5% and 1.0% fibre in concrete. An experimental investigation is carried out to find the mechanical properties of the concrete. From the test results, it was observed that a compressive strength of 95 MPa was achieved at 30% replacement of cement with UFS and 1.0% fibre content. In addition, there was a significant improvement in split tensile strength and flexural strength of the concrete. This study demonstrates that a high strength concrete can be obtained from partial replacement of cement with UFS and addition of steel fibre.

scholarly journals Pengaruh Leader Member Exchange Terhadap Kepuasan Kerja Karyawan

2017 ◽  
Vol 3 (1) ◽  
pp. 62
Author(s):  
Rizka Nurhasti Agusta Harahap ◽  
Sholihati Amalia
Keyword(s):  
Job Satisfaction ◽  
Descriptive Analysis ◽  
Analytic Method ◽  
Leader Member Exchange ◽  
Test Results ◽  
Simple Linear Regression ◽  
Cross Sectional ◽  
Employee Job Satisfaction ◽  
Regression Test ◽  
Member Exchange

This research aims to determine the influence of leader member exchange to employee job satisfaction in PT Sandy Globalindo. Leader-member exchange is variable (X) and job satisfaction is a variable (Y). The research method that used is the analytic method with cross sectional approach. The sample in this research is 101 employees. Descriptive analysis showed that the leader-member exchange in PT Sandy Globalindo in the category enough with a mean of 2.91 and job satisfaction of employees at PT Sandy Globalindo in the category enough with a mean of 3.04. Simple linear regression test results indicate that the variable leader-member exchange impact of 38.2% on job satisfaction while amounting to 61.8% of job satisfaction influenced by other things that are not explained in this research. Therefore, it can be concluded that there is a significant influence of leader-member exchange to employee job satisfaction in PT Sandy Globalindo.

Numerical Analysis and Mechanical Properties of Nomex™ Honeycomb Core

2017 ◽  
Author(s):  
Yue Liu ◽  
Weicheng Gao ◽  
Wei Liu ◽  
Zhou Hua
Keyword(s):  
Compressive Strength ◽  
Cell Walls ◽  
Mechanical Response ◽  
Compressive Loading ◽  
Fe Model ◽  
Honeycomb Core ◽  
Practical Applications ◽  
Honeycomb Sandwich ◽  
Nomex Honeycomb ◽  
Strength And Stiffness

This paper presents an investigation on the mechanical response of the Nomex honeycomb core subjected to flatwise compressive loading. Thin plate elastic in-plane compressive buckling theory is used to analyze the Nomex honeycomb core cell wall. A mesoscopic finite element (FE) model of honeycomb sandwich structure with the Nomex honeycomb cell walls is established by employing ABAQUS/Explicit shell elements. The compressive strength and compressive stiffness of Nomex honeycomb core with different heights and thickness of cell walls, i.e. double cell walls and single cell walls, are analyzed numerically using the FE model. Flatwise compressive tests are also carried out on bare honeycomb cores to validate the numerical method. The results suggest that the compressive strength and compression stiffness are related to the geometric dimensions of the honeycomb core. The Nomex honeycomb core with a height of 6 mm has a higher strength than that of 8 mm. In addition, the honeycomb core with lower height possesses stronger anti-instability ability, including the compressive strength and stiffness. The proposed mesoscopic model can effectively simulate the crushing process of Nomex honeycomb core and accurately predict the strength and stiffness of honeycomb sandwich panels. Our work is instructive to the practical applications in engineering.

Quasi-Static Failure Analysis of Honeycomb Sandwich Beam with Composite Facesheets

2010 ◽  
Vol 160-162 ◽  
pp. 855-859 ◽  
Author(s):  
Li Qing Meng ◽  
Yan Wu ◽  
Shi Zhe Chen ◽  
Xue Feng Shu
Keyword(s):  
Sandwich Beam ◽  
Indentation Test ◽  
Core Material ◽  
Honeycomb Core ◽  
Three Point Bending ◽  
Composite Sandwich ◽  
Sandwich Construction ◽  
Honeycomb Sandwich ◽  
Nomex Honeycomb ◽  
Static Failure

Sandwich construction consists of two thin composite or metal facesheets separated by a core material. Despite extensive researches on the sandwich constructions, their mechanical properties and failure behaviours are still not fully understand. The objective of the paper is to use a experimental and theoretical predicting failure mode for sandwich beam consisting of GFRP facesheets and Nomex honeycomb core. Two kinds of composite sandwich beams are observed in quasi-static three-point bending and indentation test.

scholarly journals Rethinking Basic Assumptions for Modeling Parasitic Capacitance in Inductors

2021 ◽  
Author(s):  
Hongbo Zhao ◽  
Shaokang Luan ◽  
zhan shen ◽  
Alex J.Hanson ◽  
Yuan Gao ◽  
...  
Keyword(s):  
Energy Conservation ◽  
Resonant Frequency ◽  
Parasitic Capacitance ◽  
Proper Solution ◽  
Basic Assumptions ◽  
Reasonable Solution ◽  
Network Method ◽  
Multiple Case ◽  
Multiple Case Studies ◽  
Energy Conservation Method

<b>This paper rethinks the basic assumptions often used in analytically modeling parasitic capacitance in inductors. These assumptions are classified in two commonly-used physics-based analysis methods: the lumped capacitor network method and the energy conservation method. The lumped-capacitor network method is not the proper solution for calculating the equivalent parasitic capacitance in inductors at the first resonant frequency, but rather represents the equivalent parasitic capacitance above the last resonant frequency. The energy-conservation based method is shown to be more accurate and a reasonable solution to model the equivalent parasitic capacitance at the first resonant frequency. Multiple case studies of inductors are used for verifying the theory. </b>

scholarly journals Transverse deformation effect on sensitivity of strain-sensing patch antenna

2020 ◽  
Vol 16 (3) ◽  
pp. 155014772090819
Author(s):  
Chunfeng Wan ◽  
Liyu Xie ◽  
Kangqian Xu ◽  
Songtao Xue ◽  
Can Jiang ◽  
...  
Keyword(s):  
Resonant Frequency ◽  
Patch Antenna ◽  
Test Results ◽  
Strain Sensing ◽  
Sensing Element ◽  
Rectangular Patch ◽  
Resonant Frequency Shift ◽  
Width Direction ◽  
Length Direction ◽  
Narrow Width

The strain sensor based on microwave patch antenna is proposed to monitor structural strain in structural health monitoring. When patch antenna experiences deformation, the resonant frequency of patch antenna will shift. With these characteristics, the patch antenna can operate as both the strain-sensing element and communication component. This article chooses an RT-5880 rectangular patch antenna for strain measurement, focusing on its sensing performance. For distinguishing the influence of deformation in the antenna’s length direction and width direction, the numerical simulation is implemented, and then two kinds of laboratory experiments are conducted. The first approach is to paste antennas in longitudinal and transverse ways and solve the equation set. The other approach is to design another patch antenna with narrow width and compare the test results with the wide one. All results show that the influence of deformation in wide direction on sensitivity can be neglected, and the resonant frequency shift has a good linear relationship with the strain of antenna in length direction.

Mechanical responses of a composite sandwich structure with Nomex honeycomb core

2019 ◽  
Vol 38 (13) ◽  
pp. 601-615 ◽  
Author(s):  
Yue Liu ◽  
Wei Liu ◽  
Weicheng Gao ◽  
Limeng Zhang ◽  
Enjie Zhang
Keyword(s):  
Sandwich Structure ◽  
Honeycomb Core ◽  
Mechanical Responses ◽  
Composite Sandwich ◽  
Nomex Honeycomb
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