SU185529A1 - METHOD FOR TESTING THE STRENGTH OF THE CLUTCH OF LAYERS OF MULTILAYER SAMPLES - Google Patents
METHOD FOR TESTING THE STRENGTH OF THE CLUTCH OF LAYERS OF MULTILAYER SAMPLESInfo
- Publication number
- SU185529A1 SU185529A1 SU1031102A SU1031102A SU185529A1 SU 185529 A1 SU185529 A1 SU 185529A1 SU 1031102 A SU1031102 A SU 1031102A SU 1031102 A SU1031102 A SU 1031102A SU 185529 A1 SU185529 A1 SU 185529A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- layers
- testing
- clutch
- strength
- bimetal
- Prior art date
Links
- 230000000875 corresponding Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000032798 delamination Effects 0.000 description 2
- 230000002035 prolonged Effects 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 206010040844 Skin exfoliation Diseases 0.000 description 1
- 238000004299 exfoliation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001264 neutralization Effects 0.000 description 1
Description
Известны способы испытани прочности сцеплени слоев многослойного образца, например биметалла, состо щие в сдвиге одного сло относительно другого.Methods are known for testing the adhesion strength of layers of a multi-layer specimen, for example a bimetal, consisting in shifting one layer relative to another.
Предлагаемый способ испытани прочности сцеплени слоев многослойного образца, например биметалла, отличаетс тем, что испытуемый образец, отношение толщин слоев в котором обратно пропорционально корню квадратному из отношени их модулей упругости , подвергают длительному изгибу.The proposed method for testing the adhesion strength of layers of a multilayer sample, such as a bimetal, is characterized in that the sample under test, the ratio of the thickness of the layers in which is inversely proportional to the square root of the ratio of their elastic moduli, is subjected to prolonged bending.
Этот способ позволит цроизводить испытани на стойкость против расслоени на границе раздела слоев.This method will allow for the production of delamination resistance tests at the interface of the layers.
На чертеже изображена схема испытани образцов по предлагаемому способу.The drawing shows the scheme of testing samples for the proposed method.
Образцы из биметалла изготавливаютс таким образом, чтобы граница раздела компонентов биметалла совпадала с нейтральной плоскостью. Это условие будет соблюдено в Bimetal specimens are manufactured so that the interface between the bimetal components coincides with the neutral plane. This condition will be met in
/ /
том случае, если 6i 62- I/ EIIf 6i 62- I / EI
где 6i и ба-толщины компонентов биметалла в испытуемых образцах; Е и Eg - соответст- 25 вующие модули упругости.where 6i and ba are the thicknesses of the bimetal components in the tested samples; E and Eg are the corresponding elastic moduli.
Образец / закладывают в приспособление, состо щее из скобы 2, нажима 3 и винта 4. Путем вращени винта к испытуемому образцу через нажим прикладываетс нагрузка Р, соответствующа созданию определенных касательных напр жений на границе раздела биметалла. Необходимый прогиб образцов определ етс по формулеThe sample is inserted into a device consisting of a bracket 2, a pressure 3 and a screw 4. By rotating the screw, a load P is applied to the sample under test through pressure, corresponding to the creation of certain tangential stresses at the bimetal interface. The required deflection of the samples is determined by the formula
1313
Г R
-o.-i -o.-i
где L - расчетна длина образца (рассто ние между двум опорами), ti -касательные напр жени на границе раздела биметалла дл соответствующего компонента.where L is the calculated sample length (distance between two supports), ti are tangent stresses at the bimetal interface for the corresponding component.
Величину прогиба образцов замер ют с помощью индикатора.The amount of deflection of the samples is measured using an indicator.
Образцы выдерживают в напр женном состо нии до по влени расслоени . Момент расслоени наблюдают с помощью бинокул ра (с увеличением в 10-20 раз).The specimens are kept in a tense state until the appearance of stratification. The moment of exfoliation is observed with a binocular (with a magnification of 10-20 times).
Предмет изобретени Subject invention
целью испытани на стойкость против расслоени на границе раздела слоев, берут образец , отношение толщин слоев которого обратно пропорционально корню квадратному из отношени их модулей упругости, и подвергают его длительному изгибу.The purpose of testing for resistance to delamination at the interface of the layers is to take a sample, the ratio of the thickness of the layers of which is inversely proportional to the square root of the ratio of their elastic moduli, and subject it to prolonged bending.
Publications (1)
Publication Number | Publication Date |
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SU185529A1 true SU185529A1 (en) |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4914965A (en) * | 1988-03-31 | 1990-04-10 | Agency Of Industrial Science & Technology, Ministry Of International Trade & Industry | Crack shear displacement gage |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4914965A (en) * | 1988-03-31 | 1990-04-10 | Agency Of Industrial Science & Technology, Ministry Of International Trade & Industry | Crack shear displacement gage |
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