SU1458820A1 - Method of determining continuous strength of viscoelastic materials - Google Patents
Method of determining continuous strength of viscoelastic materials Download PDFInfo
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- SU1458820A1 SU1458820A1 SU874230297A SU4230297A SU1458820A1 SU 1458820 A1 SU1458820 A1 SU 1458820A1 SU 874230297 A SU874230297 A SU 874230297A SU 4230297 A SU4230297 A SU 4230297A SU 1458820 A1 SU1458820 A1 SU 1458820A1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
Изобретение касаетс испытании строительных материалов, а именно определени их прочности. Цель изобретени - повышение достоверности определени . Неразрушающим методом определ ют модуль упругости образца материала, после чего образец нагружают через динамометр до начального напр жени , близкого к разрушающему. При зтом регистрируют рост напр жений во времени, конечную величину деформации и врем нагружени . После этого по динамометру фиксируют уменьшение напр жени во времени, по полу- ченным данным стро т график, рассчи- тьтают поправку и привод т график к виду, позвол ющему определ ть длительную прочность материала. 1 ил. (С СЛThe invention relates to the testing of building materials, namely the determination of their strength. The purpose of the invention is to increase the reliability of the determination. The elastic modulus of a sample of a material is determined by a non-destructive method, after which the sample is loaded through a dynamometer to an initial stress close to the breaking stress. At this time, the growth of stresses over time, the final amount of deformation and the loading time are recorded. After that, a decrease in voltage over time is recorded by a dynamometer, a graph is calculated using the data obtained, a correction is calculated and the graph is reduced to a form that allows determining the long-term strength of the material. 1 il. (With SL
Description
1one
Изобретение относитс к испытани м строительных материалов, а именно к определению их прочности.The invention relates to the testing of building materials, namely the determination of their strength.
Цель изобретени - повышение достоверности определени .The purpose of the invention is to increase the reliability of the determination.
На чертеже показана графическа интерпретаци получаемых результатов .The drawing shows a graphical interpretation of the results.
Способ осуществл ют следующим образом .The method is carried out as follows.
Неразрушающим, например, ультразвуковым методом определ ют модуль упругости Е образца исследуемого материала . Затем образец нагружают через динамометр с посто нной скоростью деформации 5 до начального напр жени сжати , близкого к временному со- .противлению образца разрушению . ВA non-destructive, for example, ultrasonic method determines the elastic modulus E of a sample of the material under study. Then the specimen is loaded through a dynamometer with a constant strain rate 5 up to an initial compressive stress close to the temporary resistance of the specimen to fracture. AT
процессе нагружени регистрируют по динамометру рост напр жени (о во вре- мени t, а по достижении начального напр жени сжати фиксируют конечную величину деформации у; и врем нагружени t,,. После этого по динамометру фиксируют уменьшение напр же- ни G во времени t и по полученным данным стро т график 1 изменени напр жений в образце G f (t). По фор- .муле 5 Ee;,l-l/E -d(5()/dt, где d6 ()/dt - скорость роста напр жени в момент времени t,/2,, рас- считьшают поправку i , на величину которой уменьшают ординаты графика 1, привод его к виду 2, по которому определ ют длительную прочность исследуемого материала как функцию времени. During the loading process, a voltage rise is recorded by a dynamometer (about at time t, and when the initial compressive stress is reached, the final strain value y is fixed; and the loading time t ,,. After that, the dynamic time G is recorded at the dynamometer and according to the data obtained, a graph of 1 change in stresses in the sample G f (t) is plotted. According to the formula 5 Ee; ll / E -d (5 () / dt, where d6 () / dt is the growth rate at time t, / 2 ,, calculate the correction i, the magnitude of which reduces the ordinates of schedule 1, and reduces it to type 2, according to which t long-term strength of the material under study as a function of time.
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Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU874230297A SU1458820A1 (en) | 1987-04-15 | 1987-04-15 | Method of determining continuous strength of viscoelastic materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU874230297A SU1458820A1 (en) | 1987-04-15 | 1987-04-15 | Method of determining continuous strength of viscoelastic materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU1458820A1 true SU1458820A1 (en) | 1989-02-15 |
Family
ID=21298499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU874230297A SU1458820A1 (en) | 1987-04-15 | 1987-04-15 | Method of determining continuous strength of viscoelastic materials |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU1458820A1 (en) |
-
1987
- 1987-04-15 SU SU874230297A patent/SU1458820A1/en active
Non-Patent Citations (1)
| Title |
|---|
| Б лов С.С. и др. Методика определени характеристик ползучести, длительной прочности и сжимаемости мерзлых грунтов. М.: Наука, 1966, с.41-48. Авторское свидетельство СССР № 161133, кл. Е 02 D 1/00, 1964. * |
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