• Title/Summary/Keyword: Contact Pattern

검색결과 691건 처리시간 0.03초

상어 표피 형상의 3차원 탄성접촉해석 (3D Elastic Contact Analysis of Sharkskin Surface Pattern)

  • 김태완
    • Tribology and Lubricants
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    • 제28권6호
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    • pp.297-302
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    • 2012
  • We conducted 3D elastic contact analysis of a sharkskin surface pattern for the characteristic assessment of biomimetic shark skin structure pattern for engineering applications. Rough sharkskin surfaces of similar size with real shark skin scales are generated numerically. Under the assumption of the contact of a plate on the generated sharkskin surface, contact performances such as contact pressure, real contact area, and surface separation are evaluated.

3D 가상착의를 이용한 스마트 스포츠웨어의 밀착성 평가 (Tightness Evaluation of Smart Sportswear Using 3D Virtual Clothing)

  • 김소영;이희란
    • 한국의류학회지
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    • 제47권1호
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    • pp.123-136
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    • 2023
  • To develop smart sportswear capable of measuring biometric data, we created a close-fitting pattern using two- and three-dimensional (2D and 3D, respectively) methods. After 3D virtual fitting, the tightness of each pattern was evaluated using image processing of contact points, mesh deviation, and cross-sectional shapes. In contact-point analysis, the 3D pattern showed high rates of contact with the body (84.6% and 93.1% for shirts and pants, respectively). Compared with the 2D pattern, the 3D pattern demonstrated closer contact at the lower chest, upper arm, and thigh regions, where electrocardiography and electromyography were primarily carried out. The overall average gap was also lower in the 3D pattern (5.27 and 4.66 mm in shirts and pants, respectively). In the underbust, waist, thigh circumference, and mid-thigh circumference, the cross-section distance between clothing and body was showed a statistically significant difference and evenly distributed in the 3D pattern, exhibiting more closeness. The tightness and fit of the 3D smart sportswear sensor pattern were successfully evaluated. We believe that this study is critical, as it facilitates the comparison of different patterns through visualization and digitization through 3D virtual fitting.

TLM pattern을 사용한 Cr/Ag 및 Ni 전극에 따른 접합 저항 연구 (Study of contact resistance using the transmission line method (TLM) pattern for metal of electrode (Cr/Ag & Ni))

  • 황민영;구기모;구선우;오규진;구상모
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2010년도 하계학술대회 논문집
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    • pp.349-349
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    • 2010
  • Great performance of many semiconductor devices requirs the use of low-resistance ohmic contact. Typically, transmission line method (TLM) patterns are used to measure the specific contact resistance between silicon and metal. In this works, we investigate contact resistance for metal dependent (Cr/Ag, Ni) using TLM pattern based on silicon-on-insulator (SOI) wafer. The electrode with Ni linearly increases contact resistance as the pattern distance increase from $15{\mu}m$ to $75{\mu}m$ in accumulation part, but non-linearly increase in inversion part. In additional, the electrode with Cr/Ag linearly increases contact resistance as the pattern distance increase from $15{\mu}m$ to $75{\mu}m$ in inversion part, but non-linearly increase in accumulation part.

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마이크로 크기를 가지는 빗살무늬 그루우브 패턴의 빗살각도변화에 대한 실험적 마찰특성 (Sliding Friction Property of Angle Effect for Crosshatch Micro-grooved Pattern under Lubricated)

  • 김석삼;채영훈
    • 한국기계가공학회지
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    • 제10권3호
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    • pp.94-99
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    • 2011
  • Micro-scale surface pattern has an benefit of tribological application under lubricated sliding contact. Therefore, a special pattern, that has to reduce the coulomb friction under contact, is considered to be necessary for improved efficiency of machines. The current study investigated the friction property of angle effect for micro-scale grooved crosshatch pattern on bearing steel surface using pin-on-disk type. The samples fabricated by photolithography process and then these are carry out the electrochemical etching process. We discuss the friction property due to the influence of hatched-angle on contact surface. We could be explained the lubrication mechanism for a Stribeck curve. It was found that the friction coefficient depend on an angle of the crosshatch on contact surface. It was thus verified that micro-scale crosshatch grooved pattern could affect the friction reduction.

AFM을 이용한 미세 패턴 가공 시 접촉 하중에 따른 선폭 변화에 대한 연구 (Investigation on the Effect of Contact Load on Fine Pattern Fabrication by AFM)

  • 조상범;김대은
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2005년도 추계학술대회 논문집
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    • pp.502-505
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    • 2005
  • To overcome some of the limitations in the conventional photolithography technique, MC-SPL which has advantages such as flexibility and high speed was developed in the past. To make a fine pattern using MC-SPL, there are many variables to control, for example, applied load, scribing speed, chemical etching condition, and etc. In this work, the effect of contact load on the width of the pattern was investigated. The load not only influences the width of the pattern but it also affects the wear of the probe tip. It was found that it is beneficial to load the tip in two stages. Futhermore, the experimental results showed that the pattern width was more sensitive to the initial contact force.

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두개하악장애환자의 전치부접촉과 측모두부형태간의 관계에 관한 연구 (A Study on the Correlation between Anterior Tooth Contacts and Cephalometric Profile in Patients with Craniomandibular Disorders)

  • Byung-Wook Kim;Kyung-Soo Han;Min Shin
    • Journal of Oral Medicine and Pain
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    • 제17권2호
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    • pp.37-49
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    • 1992
  • 80 patients who presented at Wonkwang University Dental Hospital with craniomandibular disorders were collected for this study. To observe the occlusal contact pattern such as contact numbers, contact force and presence or absence of anterior occlusal contact, the author used T-Scan system (Tekscan, Inc, U.S.A.) with are computerized occlusal analysing system. And to study the correlation between craniofacial profile and occlusal contact pattern, cephalogram were also taken, The cephalometric items related to growth pattern, jaw bone relation and denture pattern were measured and analysed according to routine method by computerized program. The obtained data were statistically processed with SPSS/PC+ package about anterior contact pattern and its craniofacial relationship. The obtained results were as follows : 1. In terms of growth pattern, patients without anterior tooth contacts showed a tendency to downward growth of craniofacial profile. The value in this subjects were significantly different from the value of patients with anterior tooth contacts in items of low gonial angle, Jarabak ratio, SN to GoMe angle, FMA, occlusal plane to mandibular plane angle and ramus height. 2. In terms of jaw bone relationship, patients without anterior tooth contacts showed a tendency to backward growth of craniofacial profile. The value of this patients were significantly different from the value of patients with anterior tooth contacts in items of SNB, ANB, mandibular plane to anterior cranial base ratio, SNPo, NAPo and APDI items. 3. But in denture pattern, no statistically significant difference by the presence or absence of anterior tooth contacts were showed between this patients groups. 4. From this study, it could be proposed that anterior open bite in the patients with craniomandibular disorders would be originated from not dental discrepancy but skeletal discrepancy.

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사전이도에 따른 전차선 마모 패턴 분석 (Analysis of the Contact Wire Wear Pattern According to the Pre-sag)

  • 이인희;박재영
    • 전기학회논문지
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    • 제64권10호
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    • pp.1501-1507
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    • 2015
  • The contact wire pre-sag in railway overhead catenary has been considered as a innovative idea which improves the current collection quality and is expected to evenly distribute wear along a span. However, long term studies on the effects of pre-sag, especially on the quantitative wear pattern of the contact wire, have not yet been reported. Therefore, in this study, the pre-sag and wear pattern of the contact wire along a span from long term operation of railway in Korea was surveyed. The examination was conducted on 3 lines, the Gyeongbu high-speed line with pre-sag of span/2000, the Gyeongbu existing line without pre-sag, and Gyeongchun line with pre-sag installation on 1/1000 of its span. The wear measurements of 58 sample spans were examined. The wear pattern analysis show no interrelationships between pre-sag and evenly distributed wear, but more wear occurred at the center of a span compared to the ends of the span, especially more noticeable as span length increases.

자세에 따른 골반경사운동이 편마비 환자의 발 접촉양상에 미치는 효과 (The Effect of Pelvic Tilt Exercise with Changing the Body Position on Foot Contact Pattern in Hemiplegic Patients)

  • 장상훈;박수진;김민희;김중휘;김진상
    • 대한물리의학회지
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    • 제5권3호
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    • pp.445-453
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    • 2010
  • Purpose : The purpose of this study was to investigate the effect of pelvic tilt exercise with changing the body position on foot contact pattern in the hemiplegic patients. Methods : Thirty seven hemiplegic patients were randomly divided 3 groups; control group (CG), sitting exercise group (SIEG) and standing exercise group (STEG). F-mat system and F-scan system were used for the measurement of foot contact pattern of hemiplegic side in walking. Data were analyzed statistically using paired t-test and one-way ANOVA. Results : The results were as follows : 1) Contact area of CG and SIEG were not significant difference in walking. Contact area of STEG was significant increased in walking. 2) Anteroposterior distance of COP of SIEG and STEG were significant increased in walking. Conclusion : These results suggest that pelvic tilt exercise in sitting and standing position are effective in the improvement of Anteroposterior distance of COP and gait stability are increased in only standing position.

Micro-scale Grooved Crosshatch Pattern의 각도 및 폭에 따른 실험적 미끄럼마찰특성 (Friction Property of Angle and Width Effect for Micro-grooved Crosshatch Pattern under Lubricated Sliding Contact)

  • 채영훈;김석삼
    • 한국기계가공학회지
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    • 제10권2호
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    • pp.110-116
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    • 2011
  • The current study investigated the friction property of angle and width effect for micro-scale grooved crosshatch pattern on SKD11 steel surface against bearing steel using pin-on-disk type. The samples fabricated by photolithography process and then these are carry out the electrochemical etching process. We discuss the friction property due to the influence of a hatched-angle and a width of groove on contact surface. We could be explained the lubrication mechanism for a Stribeck curve. So It was found that the friction coefficient depend on an angle of the crosshatch on contact surface. It was thus verified that micro-scale crosshatch grooved pattern could affect the friction reduction. Also, it is play an important a width of groove to be improved the friction property. I was found that friction property has a relationship between a width and an angle for micro-grooved pattern.

측방유도형태 및 저작습관이 저작근 활성도 및 교합접촉에 미치는 영향 (EFECTS OF LATERAL GUIDANCE AND CHEWING PATTERN ON MASTICATORY MUSCLE ACTIVITY AND OCCLUSAL CONTACT)

  • 고준원;정영완;조혜원;진태호
    • 대한치과보철학회지
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    • 제36권4호
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    • pp.598-614
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    • 1998
  • This study was performed to investigate the influence of lateral guidance pattern and chewing pattern on masticatory muscle activity and occlusal contact pattern. Twenty-five patients with temporomandibular disorders and thirty students without temporomandibular disorders were selected for this study. Electromyographic examination and occlusal contact examination were performed simultaneously with Bio-Pak System (Bioresearch Inc.,U.S.A.) and T-Scan System(Tekscan Co., USA). The obtained results were as follows : 1. The EMG activity of masseter and anterior temporal muscle in patient group with canine guidance was higher than with non-canine guidance. but there was no significant difference (p>0.05). 2. The EMG activity of anterior temporal muscle in normal group with non-canine guidance was higher at preferred chewing side than at opposite side (p<0.05). 3. The EMG activity of masseter muscle was higher in normal group than in patient group (p<0.05). 4. The number of occlusal contact in patient group with canine guidance was higher than with non-canine guidance, but there was no significant difference (p>0.05). 5. The occlusal contact force at preferred chewing side was higher in patient group than in normal group(p<0.05).

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