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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean Society of Manufacturing Technology Engineers
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Journal DOI :
The Korean Society of Manufacturing Technology Engineers
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Volume & Issues
Volume 4, Issue 4 - Dec 1995
Volume 4, Issue 3 - Sep 1995
Volume 4, Issue 2 - Jul 1995
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A Tendency of Forming Technique using Tailor-Welded Blanks
Journal of the Korean Society of Manufacturing Technology Engineers, volume 4, issue 4, 1995, Pages 7~15
A Numerical Simulation on Cutting Force and Surface Roughness of the Face Milling
Journal of the Korean Society of Manufacturing Technology Engineers, volume 4, issue 4, 1995, Pages 16~24
The milling process is one of the most important metal removal processes in industry. due to the complexities inherent to the cutter insert geometry and the milling cutter kinematics, these processes leave an analytically difficult to predict texture on the machined surface's hills and valleys. The instantaneous uncut chip cross sectional area may be estimated by the relative position between the workpiece and the cutter inserts. Furthermore, since the cutting forces are proportional to the instantaneous uncut chip cross sectional area, the cutting forces in face milling operations can not be estimated easily. A new simulation program which is based upon the numerical method has been proposed to estimate the cutting force components, with the ability to predict the machined surface texture left by the face milling.
A Study on the Influence of Residual Stresses on Fatigue Fracture of Aluminum Alloy Weldments
Journal of the Korean Society of Manufacturing Technology Engineers, volume 4, issue 4, 1995, Pages 25~32
This study is to inspect the influence of the initial residual stress on fatigue crack growth behavior after the distribution of the initial residual stress is measured when the crack is growing from the compressive residual stress field. Also, the tensile residual stress field. Also, the influence of the variation of residual stress distribution on fatigue crack growth behavior at the crack tip is studied when the initial crack occurs on weld metal, bead interface and HAZ (Heat Affected Zone), respectively. For this purpose, CT-type specimen that crack parallel to the welding bead were manufactured by butt welding on the Al. Alloy 1100-O plate.
Stress Analysis of Rotary Turbine Engine Disc in High Temperature
Journal of the Korean Society of Manufacturing Technology Engineers, volume 4, issue 4, 1995, Pages 33~41
This study includes thermal plasticity analyses for a turbine rotor with the simple geometry and the boundary conditions. When centrifugal or thermal stress are applied at the high temperature material of engine blade, stress distributions I material (
, Mises stress) are analyzed by computer simulation(ABQUS) as followings; 1. The maximum stress at the radial direction() is applied at the upper middle part of spline hole. 2. The maximum stress at the tangential direction() is applied at the upper right boundary of spline hole. 3. The maximum shear stress () in () direction is applied at the upper middle part of spline hole. 4. The maximum Mises stress is applied at the upper right boundary of spline hole. This stress is due to the critical stress by which rotor can be fractured according to elapsed time.
Quantitative Evaluation of Fatigue Strength using a Surface defective Low Carbon Steel
Journal of the Korean Society of Manufacturing Technology Engineers, volume 4, issue 4, 1995, Pages 42~49
It is not clearly known how defects or inclusions of a low carbon steel affect a fatigue strength. We study this issue using SM15C materials. The investigation is carried out by a quantitative evaluation, and experimental findings are: (1) a fatigue limit of A series smooth specimen is 205MPa, and that of B, C, D series is 245MPa, 304MPa and 245MPa, respectively. (2) the fatigue limit varies with respects to the stress distribution I the vicinity of a defects and crack. (3) the micro hole creates a half-circular shape crack, while the hole depth is not critical to the fatigue strength, (4) considering the fatigue strength, the hole diameter is more significant than the hole depth, and (5) Fatigue limit of artificially defected specimen is lower than that of a flawless one (5-10%), however, there exist allowance size and depth of defect which don't get to influence at fatigue limit.
Prediction Fracture Strength on Adhesively Bonded scarf Joints in Dissimilar Materials
Journal of the Korean Society of Manufacturing Technology Engineers, volume 4, issue 4, 1995, Pages 50~60
Recently advantages joining dissimiliar materials and light weight material techniques have led to increasing use of structural adhesives in the various industries. Stress singulartiy occurs at the interface edges of adhesively bonded dissimilar materials. So it is required to analyze its stress singularity at the interface edges of adhesively bonded joints indissimilar materials. In this paper, the analysis method of stress singularity is studied in detail. Also, effects of the stress singularity at the interface edge of adhesively bonded scarf joints in combinations of dissimilar materials are investigated by using 2-dimensional elastic program of boundary element method. As the results, the strength evaluation method of adhesively bonded dissimilar materials using the stress singularity factor,
,is very useful. The fracture criterion, method of strength evaluation and prediction of fracture strength by the stress singularity factor on the adhesively bonded dissimilar materials are proposed.
A Study on the Machinability and Machining properties of Composite Ceramics
Journal of the Korean Society of Manufacturing Technology Engineers, volume 4, issue 4, 1995, Pages 61~68
TiC-Al2O3 composite ceramics has high hardness, high strength, high wear and corrosion resistance. Therefore, composite ceramics have been concerned significantly with some excellent properties and many functions as new industrial materials to the industry at large. In present research, experiments are carried out to obtain the machinability and machining properties by EDM. As a result, the most suitable machining conditions of TiC-Al2O3 composite ceramics was that the pulse duration is 10-60
, the peak current is 10-16A. The machining speed and the wear of the tool electrode increased with the increase in peak current.