SU1413477A1 - Method of forming cracks in side-nicked planar specimen - Google Patents

Method of forming cracks in side-nicked planar specimen Download PDF

Info

Publication number
SU1413477A1
SU1413477A1 SU874196638A SU4196638A SU1413477A1 SU 1413477 A1 SU1413477 A1 SU 1413477A1 SU 874196638 A SU874196638 A SU 874196638A SU 4196638 A SU4196638 A SU 4196638A SU 1413477 A1 SU1413477 A1 SU 1413477A1
Authority
SU
USSR - Soviet Union
Prior art keywords
notch
specimen
condition
chosen
cracks
Prior art date
Application number
SU874196638A
Other languages
Russian (ru)
Inventor
Григорий Степанович Волков
Владимир Анатольевич Раковский
Original Assignee
Институт Проблем Прочности Ан Усср
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Институт Проблем Прочности Ан Усср filed Critical Институт Проблем Прочности Ан Усср
Priority to SU874196638A priority Critical patent/SU1413477A1/en
Application granted granted Critical
Publication of SU1413477A1 publication Critical patent/SU1413477A1/en

Links

Landscapes

  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

Изобретение относитс  к испытательной технике и может быть использовано дл  определени  стойкости тон- качистовых конструкций против распространени  трещин. Цель изобретени  - обеспечение образовани  трещин в листовых образцах, склонных к депланаири Используют плоский листовой образец 1 г боковым надрезом 2о По линии надреза 2 на заданном рассто нии L от его вершины образуют зону сжати  статическим приложением перпендикул рно поверхности образца 1 локальных самоуравновешенных усилий Р, которые прикладывают через цилиндрические накладки 5,6 диаметром D и сферический инден- тор 7. Рассто ние L от вершины 3 надреза 2 до центра зоны сн ти  выбира- HJT из услови  L 1 + D/2, где 1 - длина трешлны в момент ее остановки. Величину УСИЛИЙ Р выбирают из услови , чтобы величина напр жений 6 сжати  удовлетвор ла условию 6 (0,5-0,7)6 . где 6gp- предел прочности материала испытуемого образца при сжатии. Нагружают образец 1 путем расклинивани  надреза 2 через клин 8 усилием Q до образовани , развити  и остановки треш51ны 9 у границы зоны сжати . 2 ил. СЛThe invention relates to a testing technique and can be used to determine the resistance of thin structures to crack propagation. The purpose of the invention is to ensure the formation of cracks in sheet specimens prone to deplaniari. Use a flat sheet specimen of 1 g lateral incision of 2o. they are applied through cylindrical linings 5,6 with diameter D and spherical indenter 7. The distance L from the top 3 of notch 2 to the center of the zone of removal is chosen - HJT from the condition L 1 + D / 2, where 1 is the length of the moment in nt her stop. The magnitude of the EFFORT P is chosen from the condition that the magnitude of the compressive stresses 6 satisfy condition 6 (0.5-0.7) 6. where 6gp is the ultimate strength of the material of the test specimen under compression. Sample 1 is loaded by ripping the notch 2 through the wedge 8 with force Q prior to the formation, development and stopping of the trap 9 on the border of the compression zone. 2 Il. SL

Description

фие.2FI.2

Claims (1)

Форму ла изобретенияClaim Способ ком образце с боковым надрезом, которому образуют в заданном сечении j образца по линии надреза зону сжатия приложением статического усилия и нагружают образец путем расклинивания надреза до образования, развития и остановки трещины из его вершины, о тличающийся тем, что, с целью обеспечения образования трещин в листовых образцах, склонных к депланации, зону сжатия образуют перпендикулярными поверхности образца локальными самоуравновешенными усилиями, величину напряжений 6 при действии которых выбирают из условия 6= (0,5-0, 7) , где &6р“ предел прочности материала испытуемого образца при сжатии, а расстояние от вершины надреза до зоны сжатия выбирают равным длине трещины. в момент ее остановки.A method of a specimen with a lateral notch, which forms a compression zone in a given section j of the specimen along the notch line by applying static force and loads the specimen by wedging the notch to form, develop and stop the crack from its top, which is characterized by the fact that, in order to ensure the formation of cracks in sheet samples prone to deplanation, the compression zone is formed by local self-balanced forces perpendicular to the surface of the sample, the stress value of 6 under the action of which is chosen from the condition 6 = (0.5-0, 7), where & 6 p “the tensile strength of the material of the test specimen under compression, and the distance from the top of the notch to the compression zone is chosen equal to the length of the crack. at the time of her stop. образования трещин в плоспоcracks in the plospo
SU874196638A 1987-02-18 1987-02-18 Method of forming cracks in side-nicked planar specimen SU1413477A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU874196638A SU1413477A1 (en) 1987-02-18 1987-02-18 Method of forming cracks in side-nicked planar specimen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU874196638A SU1413477A1 (en) 1987-02-18 1987-02-18 Method of forming cracks in side-nicked planar specimen

Publications (1)

Publication Number Publication Date
SU1413477A1 true SU1413477A1 (en) 1988-07-30

Family

ID=21286398

Family Applications (1)

Application Number Title Priority Date Filing Date
SU874196638A SU1413477A1 (en) 1987-02-18 1987-02-18 Method of forming cracks in side-nicked planar specimen

Country Status (1)

Country Link
SU (1) SU1413477A1 (en)

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Авторское свидетельство СССР № 1232992, кл. G 01 N-3/08, 1985. *

Similar Documents

Publication Publication Date Title
Reichmuth Point load testing of brittle materials to determine tensile strength and relative brittleness
Brühwiler et al. Failure of dam concrete subjected to seismic loading conditions
RU2324916C1 (en) Technique for determining critical stress intensity coefficient in a body
SU1413477A1 (en) Method of forming cracks in side-nicked planar specimen
Chaker et al. Sliding effect on branch crack
Bentur et al. Crack patterns in steel fiber reinforced cement paste
Ali et al. A failure criterion for mortar joints in brickwork subjected to combined shear and tension
Davies et al. Determination of fracture parameters of a punch-through shear specimen
Nakayama et al. A novel technique for determining bond strength development between cement paste and steel
SU1357765A1 (en) Method of testing material specimens for tension
SU1244545A1 (en) Method of testing specimens in compression
Aggelis et al. Acoustic emission monitoring of steel-fiber reinforced concrete beams under bending
Johnston et al. Prestressed ceramics as a structural material
Neal Some Aspects of the Fatigue of Concrete
SU1756801A1 (en) Method of studying mechanical properties of constructional materials with consideration of loading history
Li et al. A criterion study for non-singular stress concentrations with size effect
SU819620A1 (en) Method of material destructive toughness testing
Reinhardt Length influence on bond shear strength of joints in composite precast concrete slabs
SU587362A1 (en) Method of determining fracture toughness of construction materials
SU1448277A1 (en) Method of determining the strength of aggregate for concrete
RU2058025C1 (en) Specimen for determining intensity factor of material stress of welding constructions
Ramulu et al. Subcritical growth of small fatigue cracks.
SU1250904A1 (en) Method of tension testing of specimens of anisotropic materials
RU1803776C (en) Method of determining concrete strength
SU1395976A1 (en) Method of testing material for destruction toughness