SU728028A1 - Specimen for determining fracture strength at eccentric tension - Google Patents

Specimen for determining fracture strength at eccentric tension Download PDF

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Publication number
SU728028A1
SU728028A1 SU782664040A SU2664040A SU728028A1 SU 728028 A1 SU728028 A1 SU 728028A1 SU 782664040 A SU782664040 A SU 782664040A SU 2664040 A SU2664040 A SU 2664040A SU 728028 A1 SU728028 A1 SU 728028A1
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SU
USSR - Soviet Union
Prior art keywords
registration
growth
specimen
sample
rail
Prior art date
Application number
SU782664040A
Other languages
Russian (ru)
Inventor
Николай Александрович Челышев
Владимир Нестерович Цвигун
Александр Николаевич Филин
Original Assignee
Сибирский металлургический институт им.Серго Орджоникидзе
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Priority to SU782664040A priority Critical patent/SU728028A1/en
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Publication of SU728028A1 publication Critical patent/SU728028A1/en

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Description

(54) ОБРАЗЕЦ ДЛЯ ОПРЕДЕЛЕНИЯ ВЯЗКОСТИ РАЗРУШЕНИЯ ПРИ ВНЕЦЕНТРЕННОМ РАСТЯЖЕНИИ щим устройством (начертеже не показано), расположенные по обе Стороны надреза 3. Ультразвуковой датчик-преобразователь 5 и подклю 5ёййЬе к нему рёг,йстрирую4чёё устройство б служат Дй  регистрации роста усталостной трещины. В прбцёссе испытани  предварител най статическа  нагрузка на образец создаетс  нагружающим устройством, штифты которого ввод тс  в отверсти  4. Затем образец подвергаетс  пульсирующей нагрузке, котора  вызывает зарождение и рост усталостной трещины в рабочей части 1. Регистраци  роста трещины осущес ёлйгетс  регистрирук цим устройством по сигналам датчика-преобразовател  5. Использование образца дл  опреде Шни  в зкости разрушени , выпоЛнен нЬгб из рельса, позвол ет определит влй ние технологических остаточных напр жений на усталостную прочность рельсовой стали- и повысить точность определени  ее усталостной прочносФормула изобретени  Образец дл  определени  в зкости разрушени  при внецентренном раст жении , содержащий рабочую часть и вспомогательную часть, имекщую концентратор напр жений в виде надреза и отверсти  дл  соединени  с нагружающим устройством, расположенные по обе стороны от надреза, отличающийс  тем, что, с целью определени  вли ни  те хнологических остаточных напр жений на усталостную прочность рельсовой стали, образец выполнен в виде отрезка рельса, у которого удалена подошв а , а надрез и отверсти  выполнены в шейке рельса. Источники информации, прин тые во внимание при экспертизе 1.Махутов Hi А. Сопротивление эле|лентов конструкций хрупкому разрушению. М., Машиностроение, 1973, с.98, рис.226. 2,Махутов Н.А. Сопротивление элементов конструкций хрупкому разрушеншр.М., Машиностроение, 1973, с.98, рис.22н (прототип).(54) SAMPLE FOR DETERMINATION OF VISCOSITY OF DESTRUCTION DURING EXTRA-CENTRAL EXTENSION BY THE STAYING DEVICE (not drawn), located on both sides of the notch 3. The ultrasonic transducer 5 and connecting it to the 5th vent to it, I used 4th device to serve growth of growth growth registration for my growth of growth registration of growth registration of growth registration of growth registration of the registration of growth registration of the growth registration of the registration of growth registration of the growth of the registration of growth registration of the growth of the registration of the registration of the growth of registration of the growth of the registration of the registration of the registration of the growth of the registration of the growth registration to it 5 In the pre-test test, the static load on the sample is created by a loading device, the pins of which are inserted into the holes 4. Then the sample is subjected to a pulsating load, which causes the formation and growth of the fatigue crack in the working part 1. The crack growth is recorded by the device by sensor signals -converter 5. Using a sample to determine the fracture toughness, discharged from the rail, allows you to determine the effect of process residual stresses on tiredness The strength of rail steel is to improve the accuracy of determining its fatigue strength. Formula for determining the fracture toughness at off-center tension, containing a working part and an auxiliary part, which has a notch in the form of stress and an opening for connection to a loading device, are located on both sides from the notch, characterized in that, in order to determine the effect of technological residual stresses on the fatigue strength of rail steel, the sample is made in the form of cut rail, which has removed the soles, and the cut and holes are made in the neck of the rail. Sources of information taken into account in the examination of 1. Makhutov Hi A. The resistance of elements to brittle fracture of structures. M., Mashinostroenie, 1973, p.98, fig.226. 2, N.A. Makhutov The resistance of structural elements to the fragile destruction of M., Mashinostroenie, 1973, p.98, fig.22n (prototype).

Claims (1)

Формула изобретенияClaim Образец для определения вязкости разрушения при внецентренном растяжении, содержащий рабочую часть и вспомогательную часть, имеющую концентратор напряжений в виде надреза и отверстия для соединения с нагружающим устройством, расположенные по обе стороны от надреза, отличающийся тем, что, с целью определения влияния технологических остаточных напряжений на усталостную прочность рельсовой стали, образец выполнен в виде отрезка рельса, у которого удалена подошва, а надрез и отверстия выполнены в шейке рельса.A sample for determining the fracture toughness under eccentric tension, containing a working part and an auxiliary part having a stress concentrator in the form of a notch and holes for connection to a loading device located on both sides of the notch, characterized in that, in order to determine the effect of technological residual stresses on the fatigue strength of rail steel, the sample is made in the form of a rail segment, in which the sole is removed, and the incision and holes are made in the rail neck.
SU782664040A 1978-09-13 1978-09-13 Specimen for determining fracture strength at eccentric tension SU728028A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU782664040A SU728028A1 (en) 1978-09-13 1978-09-13 Specimen for determining fracture strength at eccentric tension

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU782664040A SU728028A1 (en) 1978-09-13 1978-09-13 Specimen for determining fracture strength at eccentric tension

Publications (1)

Publication Number Publication Date
SU728028A1 true SU728028A1 (en) 1980-04-15

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SU782664040A SU728028A1 (en) 1978-09-13 1978-09-13 Specimen for determining fracture strength at eccentric tension

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SU (1) SU728028A1 (en)

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