KR960001749A - Nondestructive testing method by measuring natural frequency - Google Patents
Nondestructive testing method by measuring natural frequency Download PDFInfo
- Publication number
- KR960001749A KR960001749A KR1019940013489A KR19940013489A KR960001749A KR 960001749 A KR960001749 A KR 960001749A KR 1019940013489 A KR1019940013489 A KR 1019940013489A KR 19940013489 A KR19940013489 A KR 19940013489A KR 960001749 A KR960001749 A KR 960001749A
- Authority
- KR
- South Korea
- Prior art keywords
- predetermined material
- natural frequency
- vibration
- measuring
- defects
- Prior art date
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Abstract
본 발명은 재료의 비파괴검사방법에 관한 것으로, 특히, 금속, 플라스틱 뿐만아니라, 산업용으로 널리 사용되는 복합재료나, 이러한 재료들로 구성된 구조물의 고유진동수를 측정하여 재료내부의 박리결함을 측정하는 비파괴검사 방법에 관한 것이다. 본발명은 소정재료의 지지조건등을 고려하여 상기 소정재료의 진동을 수치해석하는 단계, 상기 소정재료에 힘을 가하여 진동을 발생시키는 단계, 상기 소정재료의 고유진동수를 측정하는 단계, 및 상기 측정된 상기 소정재료의 고유진동수와 상기 수치해석에 의한 소정재료의 진동수를 비교분석하여 상기 소정재료 내부에 존재하는 박리결함에 대한 정보를 추정하는 단계를 포함하는 것을 특징으로 한다. 본 발명에 따른 고유진동수 측정에 의한 비파괴검사방법을 이용하여 박리결함의 위치, 크기를 추정한 후, 국부적으로 신뢰성을 높이고 보다 상세한 결함의 위치 및 크기의 탐상을 위해 초음파탐상, 엑스레이탐상등의 비파괴검사방법과 연계하여 사용하면 매우 효과적이다.The present invention relates to a method for nondestructive testing of materials, and more particularly, to non-destructive measurement of peeling defects in a material by measuring a natural frequency of a composite material or a structure composed of such materials, as well as metals and plastics. It is about a test method. The present invention is to numerically analyze the vibration of the predetermined material in consideration of the support conditions of the predetermined material, generating a vibration by applying a force to the predetermined material, measuring the natural frequency of the predetermined material, and the measurement And comparing the natural frequency of the predetermined material with the frequency of the predetermined material by the numerical analysis to estimate information on peeling defects existing in the predetermined material. After estimating the location and size of the flaw defects using the non-destructive testing method using the natural frequency measurement according to the present invention, to increase the local reliability and to detect the location and size of the defects in detail, the non-destructive method such as ultrasound, X-ray, etc. It is very effective when used in conjunction with the test method.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.
제1도는 본 발명에 따른 고유진동수 측정에 의한 비파괴검사방법을 설명하기 위한 설명도.1 is an explanatory diagram for explaining a non-destructive inspection method by measuring the natural frequency according to the present invention.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019940013489A KR960001749A (en) | 1994-06-15 | 1994-06-15 | Nondestructive testing method by measuring natural frequency |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019940013489A KR960001749A (en) | 1994-06-15 | 1994-06-15 | Nondestructive testing method by measuring natural frequency |
Publications (1)
Publication Number | Publication Date |
---|---|
KR960001749A true KR960001749A (en) | 1996-01-25 |
Family
ID=66686182
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019940013489A KR960001749A (en) | 1994-06-15 | 1994-06-15 | Nondestructive testing method by measuring natural frequency |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR960001749A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100272253B1 (en) * | 1997-01-23 | 2000-12-01 | 윤종용 | Apparatus adopting non-distruction method for testing quartz tube |
KR100472881B1 (en) * | 2002-08-28 | 2005-03-08 | 주식회사 길종합건축사사무소 | Estimating method of superannuation extent of buildings |
KR100496025B1 (en) * | 2002-11-29 | 2005-06-16 | 대한민국 | Portable nondestructive quality evaluator for watermelon |
KR101369500B1 (en) * | 2012-10-10 | 2014-03-05 | 부산대학교 산학협력단 | Method for interpreting the mode of ultrasonic guided waves |
-
1994
- 1994-06-15 KR KR1019940013489A patent/KR960001749A/en not_active Application Discontinuation
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100272253B1 (en) * | 1997-01-23 | 2000-12-01 | 윤종용 | Apparatus adopting non-distruction method for testing quartz tube |
KR100472881B1 (en) * | 2002-08-28 | 2005-03-08 | 주식회사 길종합건축사사무소 | Estimating method of superannuation extent of buildings |
KR100496025B1 (en) * | 2002-11-29 | 2005-06-16 | 대한민국 | Portable nondestructive quality evaluator for watermelon |
KR101369500B1 (en) * | 2012-10-10 | 2014-03-05 | 부산대학교 산학협력단 | Method for interpreting the mode of ultrasonic guided waves |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Dackermann et al. | In situ assessment of structural timber using stress-wave measurements | |
RU2594368C2 (en) | Method of simulating non-destructive testing operations in real conditions using synthetic signals | |
Chaudhary | Effectiveness of Impact Echo testing in detecting flaws in prestressed concrete slabs | |
CA2539086C (en) | Method and apparatus for eddy current detection of material discontinuities | |
WO2003046544A3 (en) | Method to characterize material using mathematical propagation models and ultrasonic signal | |
Wu et al. | Correlation of accelerometer and microphone data in the" coin tap test" | |
Spagnolo et al. | Frescoes Diagnostics by electro-optic holography and infrared thermography | |
Minak et al. | Localization of a delamination and estimation of its length in a composite laminate beam by the VSHM and pattern recognition methods | |
Jüngert et al. | Local acoustic resonance spectroscopy (LARS) for glass fiber-reinforced polymer applications | |
Zhang et al. | ESPI non-destructive testing of GRP composite materials containing impact damage | |
Dutton | Thermoelastic stress measurement and acoustic emission monitoring in wind turbine blade testing | |
KR960001749A (en) | Nondestructive testing method by measuring natural frequency | |
Zagrai et al. | N‐Scan®: New Vibro‐Modulation System for Crack Detection, Monitoring and Characterization | |
Cawley et al. | The membrane resonance method of non-destructive testing | |
Donskoy et al. | N-scan: New vibromodulation system for detection and monitoring of cracks and other contact-type defects | |
Andreisek et al. | The virtual tap test–a training system for wind turbine rotor blade inspectors | |
Agostini et al. | Flaw detection in composite plates by means of Lamb waves | |
Sharpe | Current limitations of non-destructive testing in engineering | |
Sheppard et al. | A non-linear acoustic, vibro-modulation technique for the detection and monitoring of contact-type defects, including those associated with corrosion | |
Tse et al. | Corrosion identification of gas pipe risers in buildings using advanced ultrasonic guided waves | |
Duarte et al. | Aplicability of an electromechanical impedance NDT equipment for aeronautical applications | |
Pau et al. | Experimental investigation on contact between cylindrical conformal surfaces | |
Aldrin et al. | Case study of model-assisted probability of detection (MAPOD) evaluation for manual ultrasonic inspection of fastener sites for fatigue cracks | |
Johnson | Screening of metal matrix composites using ultrasonic C-scans | |
Tapphorn et al. | Neutron radiography of composite materials-a comparison study of advanced NDE imaging techniques |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
N231 | Notification of change of applicant | ||
WITN | Withdrawal due to no request for examination |