SU1679253A1 - Sample with a cut and a crack in cut top for crack-resistance test - Google Patents
Sample with a cut and a crack in cut top for crack-resistance test Download PDFInfo
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- SU1679253A1 SU1679253A1 SU894724478A SU4724478A SU1679253A1 SU 1679253 A1 SU1679253 A1 SU 1679253A1 SU 894724478 A SU894724478 A SU 894724478A SU 4724478 A SU4724478 A SU 4724478A SU 1679253 A1 SU1679253 A1 SU 1679253A1
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Abstract
Изобретение относитс к испытательной технике и может быть использовано дл испытани на трещиностойкость. Цель изобретени - расширение информативности за счет обеспечени возможности определени трещиностойкости в услови х релаксации . Образец выполнен в виде пр моугольной пластины с центральным надрезом и с трещиной в вершине надреза, перпендикул рной оси образца. В образце выполнены четыре одинаковых отверсти . два - симметрично оси образца и два - симметрично плоскости надреза с трещиной. Диаметр d отверстий удовлетвор ет условию d t, где Р - нагрузка страги- вани трещины; t - толщина образца; т - сопротивление материала образца срезу. Рассто ние между центрами отверстий вдоль оси образца равно 2d, а в направлении надреза составл ет 0,3-0,7 ширины образца . 1 ил. & ЁThe invention relates to a testing technique and can be used for testing for crack resistance. The purpose of the invention is to expand the information content by providing the ability to determine the crack resistance under relaxation conditions. The sample is made in the form of a rectangular plate with a central notch and with a crack at the apex of the notch perpendicular to the axis of the sample. Four identical holes are made in the sample. two - symmetrically to the axis of the sample and two - symmetrically to the notch plane with a crack. The diameter d of the holes satisfies the condition d t, where P is the load of the crack opening; t is the sample thickness; t is the resistance of the sample material to the cut. The distance between the centers of the holes along the axis of the sample is 2d, and in the direction of the notch is 0.3-0.7 the width of the sample. 1 il. & Yo
Description
Изобретение относитс к испытательной технике и может быть использовано дл испытани на трещиностойкость.The invention relates to a testing technique and can be used for testing for crack resistance.
Цель изобретени - расширение информативности за счет обеспечени возможности определени трещиностойкости в услови х релаксации.The purpose of the invention is to expand the information content by providing the ability to determine the crack resistance under relaxation conditions.
Образец выполнен в виде пр моугольной пластины с центральным надрезом и с трещиной в вершине надреза, перпендикул рной оси образца.The sample is made in the form of a rectangular plate with a central notch and with a crack at the apex of the notch perpendicular to the axis of the sample.
Образец изображен на чертеже.The sample is shown in the drawing.
В образце выполнены четыре одинаковых отверсти . Отверсти 1 и 2 и отверсти 3 и 4 симметрично оси образца, а отверсти 1 и 3 и отверсти 2 и 4 симметрично плоскости надреза 5 с трещиной 6.Four identical holes are made in the sample. Holes 1 and 2 and holes 3 and 4 are symmetrical to the sample axis, and holes 1 and 3 and holes 2 and 4 are symmetrical to the notch plane 5 with crack 6.
Диаметр d отверстий удовлетвор ет условию d г. где Р - нагрузка, соответствующа страгиванию трещины; t толщина образца; т - сопротивление материала образца срезу.The diameter d of the holes satisfies the condition d, where P is the load corresponding to the crack opening; t is the sample thickness; t is the resistance of the sample material to the cut.
Рассто ние между центрами отверстий вдоль оси образца равно 2d, а в направлении надреза составл ет 0,3-0.7 ширины образца .The distance between the centers of the holes along the axis of the sample is 2d, and in the notch direction it is 0.3-0.7 the width of the sample.
Образец испытывают раст жением в направлении продольной оси перпендикул рно надрезу.The sample is stretched in the direction of the longitudinal axis perpendicular to the notch.
Пример. Испытывали образец сплава В95пчТ2 (Т- 25 кгс/мм2} 600x200x4,37 мм. Длине исходного сквозного надреза 10 мм, ширина 0,5 мм, радиус при вершине 0.25 мм по справочным данным составл ет 4370 кгс, Диаметр отверстий 40 мм. Нагружение осуществл ли циклически с амплитудой, обеспечивающей максимальную нагрузку 4370 кгс, коэффициент асимметрии цикла равен 1.1. Скорость роста трещины уменьшалась по мере приближени вершины трещины к линии, соедин ющей отверсти .Example. The sample of the V95pchT2 alloy (T-25 kgf / mm2} 600x200x4.37 mm was tested. The original through-notch was 10 mm long, 0.5 mm wide, the radius at the tip was 0.25 mm, according to reference data, 4370 kgf, 40 mm hole diameter. The loading was carried out cyclically with an amplitude that provides a maximum load of 4370 kgf, the cycle asymmetry factor is 1.1. The crack growth rate decreased as the crack tip approached the line connecting the hole.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU894724478A SU1679253A1 (en) | 1989-05-17 | 1989-05-17 | Sample with a cut and a crack in cut top for crack-resistance test |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU894724478A SU1679253A1 (en) | 1989-05-17 | 1989-05-17 | Sample with a cut and a crack in cut top for crack-resistance test |
Publications (1)
Publication Number | Publication Date |
---|---|
SU1679253A1 true SU1679253A1 (en) | 1991-09-23 |
Family
ID=21463584
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU894724478A SU1679253A1 (en) | 1989-05-17 | 1989-05-17 | Sample with a cut and a crack in cut top for crack-resistance test |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU1679253A1 (en) |
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1989
- 1989-05-17 SU SU894724478A patent/SU1679253A1/en active
Non-Patent Citations (1)
Title |
---|
Туполев А, А. и др. Металловедение алюминиевых сплавов. - М.: Наука, 1985. с. 22- 40. * |
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