SU361433A1 - METHOD FOR DETERMINING THE EFFICIENT ENERGY OF THE CRACKED FORMATION OF REFRACTORY MATERIALS - Google Patents
METHOD FOR DETERMINING THE EFFICIENT ENERGY OF THE CRACKED FORMATION OF REFRACTORY MATERIALSInfo
- Publication number
- SU361433A1 SU361433A1 SU1645271A SU1645271A SU361433A1 SU 361433 A1 SU361433 A1 SU 361433A1 SU 1645271 A SU1645271 A SU 1645271A SU 1645271 A SU1645271 A SU 1645271A SU 361433 A1 SU361433 A1 SU 361433A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- determining
- refractory materials
- efficient energy
- sample
- cracked formation
- Prior art date
Links
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Description
1one
Изобретение относитс к области исследовани свойств огнеупорных материалов и стекла.The invention relates to the field of research of the properties of refractory materials and glass.
Известен способ определени эффективной энергии трещинообразовани огнеупорных материалов и стекла путем образовани начальной трещины в образце и последующего его разрушени .There is a known method for determining the effective energy of cracking of refractory materials and glass by forming an initial crack in a specimen and its subsequent destruction.
Цель изобретени - упростить и повысить точность определени эффективной энергии.The purpose of the invention is to simplify and improve the accuracy of determining the effective energy.
Это достигаетс тем, что начальную трещину в образце создают локальным интенсивным охлаждением равномерно нагретого образца.This is achieved by the fact that the initial crack in the sample is created by local intensive cooling of the uniformly heated sample.
Способ осуществл ют следующим образом. Образцы ,в виде дисков или пр моугольных призм нагревают до 150-300°С, в зависимости от размеров, и выдерживают до равномерного распределени температур. Затем с места ожидаемой трещины интенсивно отводитс тепло. Это достигаетс , например, прикосновением ребра .металлического стержн . Температура образца в месте отвода тепла снижаетс и создаютс локальные раст гивающие термические напр жени , которые и вызывают естественную термическую трещину. После этого путем полного механического разрущени образца определ етс эффективна энерги трещинообразовани . /The method is carried out as follows. Samples, in the form of discs or rectangular prisms, are heated to 150-300 ° C, depending on the size, and kept up to a uniform temperature distribution. Then, heat is rapidly removed from the site of the expected crack. This is achieved, for example, by touching the rib of a metal rod. The temperature of the sample at the site of heat removal decreases and local tensile thermal stresses are created, which cause a natural thermal crack. Thereafter, the effective fracture energy is determined by complete mechanical destruction of the sample. /
Описываемым способом определ лась, например , эффективна энерги трещинообразовани дл различных сортов силикатного стекла и плотной высокотемпературной керамики на основе двуокиси циркони и окиси алюмини . При этом круглые пластинки толщинойThe described method was used to determine, for example, the effective cracking energy for different grades of silicate glass and dense high-temperature zirconia and alumina-based ceramics. In this round plate thickness
до 5 мм и диаметром 50 мм равномерно нагреваютс в лабораторной печи примерно до 200°С.up to 5 mm and a diameter of 50 mm are uniformly heated in a laboratory oven to approximately 200 ° C.
Дл местного отвода тепла используют медный призматический стержень 5X40X250 мм.For local heat removal, a copper prismatic core of 5X40X250 mm is used.
К центру пластины прикасаютс ребром длиной 5 мм. Получаютс трещины длиной до 7 мм с естественной остротой концов. После создани естественной трещины диаметральным сжатием производ т полное разрущениеThe center of the plate is touched by an edge 5 mm long. Cracks of up to 7 mm in length are obtained with the natural sharpness of the ends. After the creation of a natural crack, diametral compression produces complete destruction.
образцов при зафиксировании разрушающей силы. Затем вычисл ютс значени эффективной энергии трещинообразовани .samples when fixing the destructive force. The values of the effective energy of cracking are then calculated.
Предмет и з о б р е т е н И Subject and reference
2020
Способ определени эффективной энергии трещинообразовани огнеупорных .материалов и стекла путем образовани начальной трещины в образце и последующего его разрущени , отличающийс тем, что, с целью упрощени и повыщени точности определени , начальную трещину в образце создают локальным интенсивным охлаждением равномерно нагретогоThe method for determining the effective energy of cracking of refractory materials and glass by forming an initial crack in the sample and its subsequent destruction, characterized in that, in order to simplify and improve the determination accuracy, the initial crack in the sample is created by local intensive cooling of the uniformly heated
образца.sample.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1645271A SU361433A1 (en) | 1971-04-22 | 1971-04-22 | METHOD FOR DETERMINING THE EFFICIENT ENERGY OF THE CRACKED FORMATION OF REFRACTORY MATERIALS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1645271A SU361433A1 (en) | 1971-04-22 | 1971-04-22 | METHOD FOR DETERMINING THE EFFICIENT ENERGY OF THE CRACKED FORMATION OF REFRACTORY MATERIALS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU361433A1 true SU361433A1 (en) | 1972-12-07 |
Family
ID=20471994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU1645271A SU361433A1 (en) | 1971-04-22 | 1971-04-22 | METHOD FOR DETERMINING THE EFFICIENT ENERGY OF THE CRACKED FORMATION OF REFRACTORY MATERIALS |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU361433A1 (en) |
-
1971
- 1971-04-22 SU SU1645271A patent/SU361433A1/en active
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