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 SAMPLES

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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
Application number
SU1031102A
Other languages
Russian (ru)
Original Assignee
А. С. Михайлов , В. Б. Вихман
Publication of SU185529A1 publication Critical patent/SU185529A1/en

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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.

SU1031102A METHOD FOR TESTING THE STRENGTH OF THE CLUTCH OF LAYERS OF MULTILAYER SAMPLES SU185529A1 (en)

Publications (1)

Publication Number Publication Date
SU185529A1 true SU185529A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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