• Title/Summary/Keyword: Stud Shape

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Sound Insulation Performance According to Stud Shape of Dry Wall (스터드 형상에 따른 Dry Wall의 차음성능변화)

  • An, JangHo;Kim, KyungHo;Lee, HunSeo;Kim, SeongHoon
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2013.04a
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    • pp.407-412
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    • 2013
  • In dry wall, noise is passed through gypsum board and stud. Noise makes gypsum board vibration. Then, the vibration passes through stud and gypsum board as resonation. And radiation as noise from surface of gypsum board into adjacent room. At this moment, according to thickness, placement and cross-section of stud, noise transmission ratio changes. Thicker stud has better sound insulation performance. Studs are apart from each other, has better sound insulation performance. But, single stud structure has restriction of thickness and arrange of studs. In this article, Sound insulation performance varies depending on the shape of the studs were studied.

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Net Shape Forming Process for Ball Stud Using High Strength Micro-Alloyed Cold Forging Steel (냉간 비조질강을 이용한 볼 스터드의 정형가공 공정연구)

  • Yoon, D.J.;Choi, H.J.;Lee, H.W.;Lee, G.A.;Jang, B.L.;Seo, S.L.;Choi, S.
    • Transactions of Materials Processing
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    • v.15 no.8 s.89
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    • pp.562-567
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    • 2006
  • Micro-alloyed steel or heat-treatment-free used in clean technology have been replacing for conventional quenched-and-tempered structural steels since the micro-alloyed forging steel was developed in early 1970s in Germany for saving money of heat treatment, simplified process, short delivery and good productivity. In this paper, ball stud assembled in steering system for automobile was selected to compare conventional process making heat treatment with new process using high strength micro-alloyed steel without heat treatment. The conventional process for ball stud was composed of a total of 6 steps including upsetting, forward extrusion, machining, burnishing and tread rolling with heat treatment and shot blasting. As opposed to conventional process, newly proposed process for ball stud using the clean technology without heat treatment is simplified such as forward extrusion, heading, upsetting, forming having a flange shape and tread rolling. Also net shape forming process to achieve specified process not to include machined step fur manufacturing the ball stud was applied to newly simplified process since micro-alloyed steel is difficult to be formed.

An Experimental Study on the Shear Connection of Inverted T-shape Composite Beam Encased Web (역T형강 합성보의 전단연결에 관한 실험적 연구)

  • Jeong, Jae-Hun;Kim, Jin-Mu
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.5 no.4
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    • pp.131-138
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    • 2001
  • In inverted T-shape composite beam examine the structural behavior by experiment According to arrangement, type of stud connector, type of shear connector, reinforcement by welding of stirrup and a close analysis we came to these conclusion. 1) The compare result of bending strength according to arrange type of stud connector : A1-W(stud connector located web)specimen is exceed than A1-F(stud connector located flange). 2) B1-N(using prominence and depression of the web by shear connector) specimen is decrease than A1-W(using stud bolt by shear connector)specimen in bending strength and B2-N(reinforced by welding the stirrup to lower flange)specimen is similar with A2-W specimen. 3) According to reinforced by welding the stirrup to flange, the stiffness and bending strength of the beams are increase. A-scries stirrup comparatively low effective in the increase of strength by welding the stirrup to flange because enough composite effect show by stud connector, but B-series stirrup is comparatively high effective in shear connector effect because shortage of prominence and depression of the web.

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A Study on Thermal performance as Form of Steel stud by Using Thermal Video Camera (열화상 카메라를 이용한 건식벽체의 스틸스터드 형상에 따른 열성능 비교연구)

  • Jang, Cheol-Yong;Um, Eun-Jung;Lee, Na-Eun
    • 한국태양에너지학회:학술대회논문집
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    • 2009.11a
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    • pp.236-240
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    • 2009
  • Dry wall using steel stud has the advantage of possibility to install various building, so it used to many buildings inside and outside of the country very rapidly. Though Light gauge steel framed housing offers many advantages to the consumer and the builder, the use of steel studs in wall system cause thermal problems such as thermal performance and pattern staing on walls. The present study has been conducted to observe effect of stud by the shape, and two kind of stud is made for this test to compare thermal performance. The test was conducted by setting those stud on the chamber and heating them. As the results of test and photograping by using TVS, there was temperature gap of each stud, and surface temperature of each section was appeared differently due to shape of stud delaying thermal bridge.

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A Comparison Analysis on Thermal Performance According to Shape of Steel Stud Applied to Steel House (스틸 하우스 적용 스틸 스터드의 형상에 따른 단열성능 비교 연구)

  • Jang, Cheol-Yong;Lee, Na-Eun;Um, Eun-Jung
    • 한국태양에너지학회:학술대회논문집
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    • 2009.11a
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    • pp.241-245
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    • 2009
  • The dry wall using steel stud is used to buildings in the inside and outside of the country because it has the merit that application is possible to various architecture. The purpose of this study is to measure thermal performance of dry wall which uses steel stud transformed one by using measurement equipment to decrease heat bridge of steel stud and ensure heat performance as dry wall. As a comparative performance test result, dry wall which uses steel stud transformed one has a performance enhancement compare with the dry wall using general steel stud.

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Analytical Study for Design of Shape and Arrangement Spacing of Studs in Steel Plate Concrete(SC) Wall subjected to Shear and Axial Forces (전단력과 축하중을 받는 강판 콘크리트(SC) 벽체에서 스터드의 형상과 배치간격의 설계를 위한 해석적 연구)

  • Cho, Sung-Gook;Lim, Jin-Sun;Jeong, Young-Do;Yi, Seong-Tae
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.18 no.4
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    • pp.67-76
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    • 2014
  • In this study, the behavior of Steel Plate Concrete (SC) walls subjected to shear and axial forces to investigate the effects of shape and arrangement spacing of studs on the design of SC walls was analytically reviewed. For this purpose, 9 cases of finite element analyses considering the different shape and spacing of studs in SC wall were performed. The results showed that the steel plate was yielded at the lower load than the second yielding shear force of the design skeleton curve when the spacing of stud is excessively far from each other. It is also found that the shape of the stud did not affect the shear behavior of SC wall but, the spacing influenced to its composite action. In this study, it was also proven that the inclined shaped stud resists more effectively to the bucking load than the general shaped stud in SC wall.

A Study on Turbulence Stimulation Effect of Studs for Boundary Layer Over a Flat Plate (평판 경계층에 대한 스터드의 난류촉진 영향 연구)

  • Lee, Joon-Hyoung;Jeong, So-Won;Hwang, Seunghyun
    • Journal of the Society of Naval Architects of Korea
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    • v.59 no.1
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    • pp.18-28
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    • 2022
  • The turbulence stimulation effect of studs for boundary layer over a flat plate was investigated through the flow measurement in KRISO cavitation tunnel. For the test, Laser Doppler Velocimetry (LDV) and three flat plate models were used: (1) flat plate without studs; (2) flat plate with one stud row; (3) flat plate with two stud rows. The dimension and location of stud rows and the inflow speed were selected considering test conditions for standard-sized model ships in KRISO towing tank. The boundary layer characteristics of test models were analyzed and compared in terms of mean velocity profiles, turbulence intensity profiles, boundary layer thickness, and shape factor. In the case of the flat plate without studs, transition from laminar to turbulent flow occurred around Rex=3.83 ~ 5.19 × 105. In the case of flat plates with stud rows, the flow rapidly changed into turbulent flow right after passing the first stud row. In the state where turbulence was already developed, the second stud row slightly increased the turbulence intensity near the top of the stud, but did not significantly affect the boundary layer characteristics such as mean velocity distribution, boundary layer thickness, and shape factor.

Reliability Evaluations for Shear Strength of Resistance Welded Ball Stud according to Different Cooling Methods

  • Park, In-Duck;Nam, Ki-Woo
    • Journal of Power System Engineering
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    • v.22 no.6
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    • pp.44-50
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    • 2018
  • As a type of bolt with a spherical head, the ball stud is widely used as a part of a ball joint in steering or suspension systems in automobiles. Balls and studs are subjected to heat treatment suitable for each material; in particular, the shear strength of the ball stud must meet the specifications of the production company. This study evaluated the shear strength of joints according to the cooling method of ball studs subject to resistance welding. The shear stress of water cooling was higher than that of air cooling (as-received material). Note, however, th at oil cooling showed lower stress than that of as-received. When judged by standard deviation, mean, and coefficient of variation according to the arithmetic statistics and shape parameter as well as scale parameter, oil cooling is suitable.

Analytical performance evaluation of modified inclined studs for steel plate concrete wall subjected to cyclic loads

  • Lim, Jin-Sun;Jeong, Young-Do;Nam, Jin-Won;Kim, Chun-Ho;Yi, Seong-Tae
    • Computers and Concrete
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    • v.17 no.2
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    • pp.227-240
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    • 2016
  • An analytical study was conducted to investigate the effect of the shape and spacing of modified inclined studs used as shear connector between concrete and steel plate on the cyclic behavior of steel plate concrete (SC) shear wall. 9 different analysis cases were adopted to determine the optimized shape and spacing of stud. As the results, the skeleton curves were obtained from the load-displacement hysteresis curves, and the ultimate and yielding strengths were increased as the spacing of studs decrease. In addition, the strength of inclined studs is shown to be bigger compared to that of conventional studs. The damping ratios increased as the decrease of stiffness ratio. Finally, with decreasing the spacing distance of studs, the cumulative dissipated energy was increased and the seismic performance was improved.

Tensile Load Transmission Capacity of H-shaped Beam by Stud Connectors (스터드 커넥터로 연결된 H형강보의 인장하중 전달성능)

  • Lee, Myung Jae;Choi, Wan Chol;Kim, Won Ki;Kim, Jae Hee;Lee, Sang Ho
    • Journal of Korean Society of Steel Construction
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    • v.16 no.2 s.69
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    • pp.267-274
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    • 2004
  • The objective of this study is to evaluate tensile load transmission capacity of H-shaped beam about design load by stud connector. The basic test of stud connecter was conducted and two specimens of full-scale size were tested under monotonic tensile loading condition. The parameter of tests is the size of the H-shaped beams. The results show that tensile load transmission capacity of H-shape beam about design load by stud connectors is excellent observing to the design code of steel structures of Architectural Institute of Korea.