SU819621A1 - Method of material dynamic destructive toughness testing - Google Patents
Method of material dynamic destructive toughness testing Download PDFInfo
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- SU819621A1 SU819621A1 SU792782123A SU2782123A SU819621A1 SU 819621 A1 SU819621 A1 SU 819621A1 SU 792782123 A SU792782123 A SU 792782123A SU 2782123 A SU2782123 A SU 2782123A SU 819621 A1 SU819621 A1 SU 819621A1
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- USSR - Soviet Union
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- crack
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- testing
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- fracture toughness
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
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(54) СПОСОБ ИСПЫТАНИЯ МАТЕРИАЛА НА ДИНАМИЧЕСКУЮ ВЯЗКОСТЬ РАЗРУШЕНИЯ трещины 3 до горца пластины выбирают из услови e7/ct/2, где с - скорость распространени упругой волны в материале образца; - врем от начала нагружени до момента начала роста тре щины..При подрыве зар да ВВ давление продуктов взрыва возбуждает в образце циПЙндрическую волну, прохождение которо через область усть трещины 3 сопрово кдаетс возникновением раст гивающих напр жений, привод щих к ее иниции рованию. Регистрируют диаграмму изменени давлени во време1ш с помощью осциллографировани сигнала от датчика давлени и момент инициировани тре- щины с помощью датчика 6 разрыва. Затем провер ют, удовлетвор ет ли приведенному выше условию размер t от усть трещины до.торца пластины. Если условие не выполнено, то необходи мо изменить геометрические размерьт образца. Указанный выбор величины В позвол ет учесть распространение тольк первой волны нагрузки без ее взаимодействи с отраженными волнами. Если условие дл величины В выполнено, то затем рассчитывают динамическую в зкость разрушени материала в устье тре щины в момент ее динамического инициировани , котора характеризует тре- щиностойкость. материала и служит дл (54) METHOD FOR TESTING MATERIAL ON DYNAMIC VISCOSITY OF DESTRUCTING a crack 3 to a highlander plate is chosen from the condition e7 / ct / 2, where c is the velocity of propagation of an elastic wave in the sample material; - time from the beginning of loading to the moment of the beginning of crack growth. When explosive charge is detonated, the pressure of the explosion products excites a cypdrial wave in the sample, the passage of which through the region of the crack 3 is accompanied by the appearance of tensile stresses leading to its initiation. A graph of the pressure change over time is recorded by oscillography of the signal from the pressure sensor and the moment of crack initiation by means of the fracture sensor 6. Then it is checked whether the above condition satisfies the size t from the mouth of the crack to the end face of the plate. If the condition is not fulfilled, then the geometric dimensions of the sample must be changed. This choice of value B makes it possible to take into account the propagation of only the first wave of the load without its interaction with the reflected waves. If the condition for the value B is fulfilled, then the dynamic viscosity of the material destruction at the crack mouth at the time of its dynamic initiation, which characterizes the crack resistance, is calculated. material and serves for
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Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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SU792782123A SU819621A1 (en) | 1979-06-19 | 1979-06-19 | Method of material dynamic destructive toughness testing |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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SU792782123A SU819621A1 (en) | 1979-06-19 | 1979-06-19 | Method of material dynamic destructive toughness testing |
Publications (1)
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SU819621A1 true SU819621A1 (en) | 1981-04-07 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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SU792782123A SU819621A1 (en) | 1979-06-19 | 1979-06-19 | Method of material dynamic destructive toughness testing |
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SU (1) | SU819621A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110672438A (en) * | 2019-10-16 | 2020-01-10 | 浙江科技学院 | Round hole linear nail column type double-sided energy-gathering joint cutting device for dynamically punching rock-soil body |
-
1979
- 1979-06-19 SU SU792782123A patent/SU819621A1/en active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110672438A (en) * | 2019-10-16 | 2020-01-10 | 浙江科技学院 | Round hole linear nail column type double-sided energy-gathering joint cutting device for dynamically punching rock-soil body |
CN110672438B (en) * | 2019-10-16 | 2021-11-23 | 浙江科技学院 | Round hole linear nail column type double-sided energy-gathering joint cutting device for dynamically punching rock-soil body |
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