SU670882A1 - Acoustic method of investigating material strength characteristics - Google Patents
Acoustic method of investigating material strength characteristicsInfo
- Publication number
- SU670882A1 SU670882A1 SU772443765A SU2443765A SU670882A1 SU 670882 A1 SU670882 A1 SU 670882A1 SU 772443765 A SU772443765 A SU 772443765A SU 2443765 A SU2443765 A SU 2443765A SU 670882 A1 SU670882 A1 SU 670882A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- strength characteristics
- material strength
- angle
- acoustic method
- defect
- Prior art date
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Description
ПрИ отсутствии поверхностной трещины угол а между направлением прозвучквани W и вектором // начальной скорости колебани ра-вен 75°, в противном случае этот угол увеличиваетс .When there is no surface crack, the angle α between the direction of the sound W and the vector // of the initial oscillation velocity is 75 °, otherwise this angle increases.
Поверхность материала испытываетс по плош,ади двум преобразовател ми (излучателем и приемником), рассто ние между которыми выбираетс в 4-6 раз больше ожидаемой глубины трещин. При испытани х нрОВодитс фиа{саци угла между осью прозвучизани и вектором начальной скорости , и если отмечаетс переход вектора скорости ,из первого во второй квадрант шкалы индикатора, это овидетельст/вует о наличии дефекта в зоне прозвучивани . Параллельное смещение Преобразователей позвол ет найти середину дефекта, установить его прот женность «в дллну, а также угол, .под которым он находитс по отиошению к линии прозвучивани .The surface of the material is tested in a continuous manner, using two transducers (emitter and receiver), the distance between which is 4-6 times greater than the expected crack depth. In tests, the frequency of the angle between the axis of sounding and the initial velocity vector, and if the transition of the velocity vector is noted, from the first to the second quadrant of the indicator scale, indicates the presence of a defect in the sounding zone. The parallel displacement of the transducers makes it possible to find the middle of the defect, to establish its length in length, as well as the angle at which it is located in relation to the sound line.
Дл измерени глубины один или оба прео|бразозател сближают до тех пор, пока угол а вектора не увеличитс иа 180° по сравнению с первоначальным углом иа бездефектном участке. Отметив на поверхности место расположени того преобразовател , при перемещении которого был зафиксирован максимальный угол а, его несколько удал ют от дефекта и приближают второй (Преобразователь к дефекту снова до полного возрастани угла. Отметив место контакта второго преобразовател иа поверхности, наход т глубину дефекта, как .половину рассто ни между отметками иа поверхности. иМестоположение скрытого дефекта будет посередине между отметками.To measure the depth, one or both converters are brought together until the vector angle a increases by 180 ° compared to the initial angle of the defect-free area. Noting on the surface the location of the converter, during its movement the maximum angle a was fixed, it is somewhat removed from the defect and the second one is brought closer (The converter again approaches the defect until the angle completely increases. Having noted the contact point of the second converter surface, find the depth of the defect as The half the distance between the marks on the surface and the location of the hidden defect will be midway between the marks.
МетодИКа обнаружени трещин и измерени ее глубины по показателю исключает необходимость измерений отрезков времени, вычислений скорости упругих волн, а также lie требует каких-либо амплитудных спектральных или фазовых измерений. Поэтому снижаютс требовани к акустическому KOiixaKTy между наконечниками преобразор ,ателей и поверхностью материала.The method of detecting cracks and measuring its depth in terms of the indicator eliminates the need for measuring time intervals, calculating the velocity of elastic waves, and also requires some amplitude spectral or phase measurements. Therefore, the acoustic KOiixaKTy requirements between the transducer tips, the jacks and the surface of the material are reduced.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU772443765A SU670882A1 (en) | 1977-01-04 | 1977-01-04 | Acoustic method of investigating material strength characteristics |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU772443765A SU670882A1 (en) | 1977-01-04 | 1977-01-04 | Acoustic method of investigating material strength characteristics |
Publications (1)
Publication Number | Publication Date |
---|---|
SU670882A1 true SU670882A1 (en) | 1979-06-30 |
Family
ID=20692144
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU772443765A SU670882A1 (en) | 1977-01-04 | 1977-01-04 | Acoustic method of investigating material strength characteristics |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU670882A1 (en) |
-
1977
- 1977-01-04 SU SU772443765A patent/SU670882A1/en active
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