• Title/Summary/Keyword: Tension Distribution

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Finite Element Analysis for the Variation of Carcass Tension Distribution to the Sidewall-Radius Change (Sidewall 반경변화에 따른 Carcass 장력분포 변동 추이에 관한 유한요소 해석)

  • Jo, Jin-Rae;Jeong, Hyeon-Seong;Lee, Hong-U;Kim, Nam-Jeon;Kim, Gi-Un
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.25 no.6
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    • pp.980-987
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    • 2001
  • Tire performance is significantly influenced by the carcass tension distribution that is governed by the sidewall contour. To maximize the tire performance, it is very important for one to find the sidewall contour with the ideal tension distribution. But it is not easy to find such an optimal sidewall contour. Therefore, in order for a successful tire-shape optimization, we need to investigate how the change of sidewall radius influences on the carcass tension distribution. In this paper, we intend to numerically investigate the relation between the sidewall-radius change and the carcass tension distribution.

Finite Element Analysis for the Variation of CARCASS Tension Distribution to the Sidewall Contour Change (타이어 측면 형상변화에 따른 CARCASS 장력분포 변동에 관한 유한요소 해석)

  • Jeong, H.S.;Lee, H.W.;Ha, D.Y.;Kim, S.H.;Cho, J.R.;Kim, N.J.;Kim, K.W.
    • Proceedings of the KSME Conference
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    • 2000.11a
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    • pp.438-445
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    • 2000
  • Tire performance is significantly influenced by the cord tension distribution, and which is governed by the tire shape. To increase the tire performance, it is very important for one to find the shape with the ideal distribution of tension. But it is not easy to find such an optimal tire shape. Therefore, in order for the successful tire-shape optimization, we need to investigate how the change of tire shape influences on the cord tension. In this paper, we intend to numerically analyse the relation between the carcass shape and the cord tension.

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The study of stress distribution of cold rolled Steel sheets in tension leveling process (냉연 형상 교정시 Stress 천이 현상 연구)

  • Choi H.T.;Hwang S.M.;Koo J.M.;Park K.C.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • 2004.05a
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    • pp.74-79
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    • 2004
  • The shape of cold rolled steel sheets is the degree of flatness, and the flatter, the better. Because undesirable strip shapes of cold rolled steel sheets can affect not only visible problem but also automatic working process in customer's lines, the requirement of the customers is more and more stringent. So we usually used the tension leveler to make high quality of strip flatness. For the improvement of the quality of strip flatness, this report developed three-dimensional FEM (Finite Element Method) simulation model, and analysis about the strain and stress distribution of strip in the tension leveling process.

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Belt Tension Distribution for Belt Contact Abrasive Belt Drive (벨트접촉식 연삭 벨트구동의 벨트 장력 분포)

  • 임영호;김현수;안효원
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.13 no.5
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    • pp.837-846
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    • 1989
  • Belt tension distribution for an abrasive blet grinding was investigated analytically and experimentally for (1) slack side and (2) tight side blet grinding. Classical Eytelwein equation was used to predict the belt tension distribution with dividing contact angles into (1) inactive and (2) active angles. General friction theory was modified based on the friction force between the belt and the support in the grinding contact area that was obtained by experiments. It was found that analytical results were in good agreement with the experimental results. Also, the tight side belt grinding was recommended since it could carry out more grinding load than that of slack side belt grinding.

The Behavior of Tension Splices Fastened with Bolted Connections (볼트로 접합된 인장 이음부의 거동)

  • Choi, Byong-Jeong
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.9 no.1
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    • pp.225-232
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    • 2005
  • The paper presented results of the strength distributions and tension failure behaviors of splices subjected to tension forces. The bolting patterns in the tension splices are regular and staggered patterns in the research. The finite element analyses were carried out to examine the experimental results and evaluated the stress distribution patterns. The yield stresses, maximum tension stresses, stress distribution ratios, and effective net areas were analyzed through the tension experiments.

Study of Stress Distribution of Cold Rolled Steel Sheets in Tension Leveling Process (냉연 형상 교정시 Stress 천이 현상 연구)

  • Choi H. T.;Hwang S. M.;Koo J. M.;Park K. C.
    • Transactions of Materials Processing
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    • v.13 no.6 s.70
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    • pp.497-502
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    • 2004
  • The shape of cold rolled steel sheets is defined as the degree of flatness, and the flatter, the better. Because undesirable strip shapes of cold rolled steel sheets can affect not only visible problem but also automatic working process in customer's lines, the requirement of the customers is more and more stringent. So we usually used the tension leveler to make high quality of strip flatness. For the improvement of the quality of strip flatness, this report developed three- dimensional FEM (Finite Element Method) simulation model, and analysis about the strain and stress distribution of strip in the tension leveling process. The numerical study can be summarized as follows. (1) If we pass the edge wave material (steepness: $1.0\%$) that the stress-difference between the strip center and the edge is 5.2kgf through tension leveler. the stress-difference is decreased 0.45kgf and the steepness is improved to $0.29\%$. (2) If the Intermesh is increased from 6mm to 7mm, the steepness is improved from $0.294\%$ to $0.268\%$. (3) If the initial steepness is decreased form $1.0\%$ to $0.75\%$, the final steepness is improved from $0.294\%$ to $0.263\%$. We know that more increased intermesh and lower initial steepness make the final steepness improved.

Effect of Taper Tension Profiles on Radial Stress of a Wound Roll in Roll-to-roll Winding Process (롤투롤 와인딩 시스템에서 테이퍼 장력과 감김롤 응력분포에 관한 연구)

  • Lee, Changwoo
    • Journal of the Korean Society for Precision Engineering
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    • v.31 no.2
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    • pp.125-131
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    • 2014
  • Winding is an integral operation in almost every roll-to-roll continuous process and center-winding is suitable and general scheme in the winding system. However, the internal stresses within center-wound rolls can cause damage such as buckling, spoking, cinching, etc. It is therefore necessary to analyze the relationship between taper tension in winding section and internal stress distribution within center-wound roll to prevent the winding failure. In this study, an optimal taper tension control method with parabolic taper tension profile for producing high quality wound roll was developed. The new logic was designed from analyzing the winding mechanism by using the stress model in center-wound rolls. The performance of the proposed taper tension profile was verified experimentally.

Failure Probability Models of Concrete Subjected to Split Tension Repeated- Loads (쪼갬인장 반복하중을 받는 콘크리트의 파괴확률 모델)

  • 김동호;김경진;이봉학;윤경구
    • Proceedings of the Korea Concrete Institute Conference
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    • 2003.05a
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    • pp.311-314
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    • 2003
  • Concrete structures such as bridge, pavement, airfield, and offshore structure are normally subjected to repeated load. This paper proposes a failure probability models of concrete subjected to split tension repeated-loads, based on experimental results. The fatigue tests were performed at the stress ratio of 0.1, the loading shape of sine, the frequency of 20Hz, and the stress levels of 90, 80 and 70%. The fatigue test specimen was 150mm in diameter and 75mm in thickness. The fatigue analysis did not include which exceeded 0.9 of statistical coefficient of determination values or did not failure at 2$\times$$10^6$ cycles. The graphical method, the moment method, and maximum likelihood estimation method were used to obtain Weibull distribution parameters. The goodness-of-fit test by Kolmogorov-Smirnov test was acceptable 5% level of significance. As a result, the proposed failure probability model based on the two-parameter($\alpha and \mu$) Weibull distribution was good enough to estimate accurately the fatigue life subjected to tension mode.

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Cracking Analysis of RC Tension Members Using Polynomial Strain Distribution Function (다항식 변형률 분포함수를 이용한 철근콘크리트 인장부재의 균열해석)

  • 곽효경;송종영
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • 2001.04a
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    • pp.267-274
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    • 2001
  • In this paper, a analytical model which can simulate the post-cracking behavior and tension stiffening effect in a reinforced concrete(RC) tension member is proposed. Unlike the classical approaches using the bond stress-slip relationship or the assumed bond stress distribution, the tension stiffening effect at post-cracking stage is quantified on the basis of polynomial strain distribution functions of steel and concrete, and its contribution is implemented into the reinforcing steel. The introduced model can be effectively used in constructing the stress-strain curve of concrete at post-cracking stage, and the loads carried by concrete and by reinforcing steel along the member axis can be directly evaluated on the basis of the introduced model. In advance, the prediction of cracking loads and elongations of reinforced steel using the introduced model shows good agreements with results from previous analytical studies and experimental data.

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Elasto-plastic Finite Element Analysis for the Parametric Process Design of the Tension Leveller(1) -Unit Model Analysis (금속인장교정기의 공정변수 설계를 위한 탄소성 유한요소해석 (1)-단순모델 해석)

  • Lee, H.W.;Huh, H.;Park, S.R.
    • Transactions of Materials Processing
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    • v.11 no.2
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    • pp.138-146
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    • 2002
  • This paper is concerned with the simulation-based process design method involved non-steady state problem of tension levelling considering the elasto-plastic hardening behavior of a metallic strip by a commercial code ABAQUS/Standard. The tension levelling process is peformed to elongate the strip plastically in combination of tensile and bending strain by a controlled manner so that all longitudinal fibers in the strip have an approximately equal amount of length and undesirable strip shapes are corrected to the flat share. Objectives of this paper are the development of a general method for the design of a tension leveller by a finite element method and parameter studies for the deisgn variables such as the applied tension, the roll intermash includes the determination of the steady state using the simple unit of the tension levelling line and the effect of the finite element mesh size on the amount and distribution of the strain calculated. The analysis provides the information about the intermesh effect on the amount and final shapes of the strip and distribution of the strain in order to determine the amount elongation for correction of the irregular share.