GB946415A - Testing apparatus for use with a hydraulic load device - Google Patents

Testing apparatus for use with a hydraulic load device

Info

Publication number
GB946415A
GB946415A GB1193161A GB1193161A GB946415A GB 946415 A GB946415 A GB 946415A GB 1193161 A GB1193161 A GB 1193161A GB 1193161 A GB1193161 A GB 1193161A GB 946415 A GB946415 A GB 946415A
Authority
GB
United Kingdom
Prior art keywords
piston
cylinders
valve
loading
pump
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB1193161A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Losenhausenwerk Duesseldorfer Maschinenbau AG
Original Assignee
Losenhausenwerk Duesseldorfer Maschinenbau AG
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 Losenhausenwerk Duesseldorfer Maschinenbau AG filed Critical Losenhausenwerk Duesseldorfer Maschinenbau AG
Publication of GB946415A publication Critical patent/GB946415A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
    • G01N3/36—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by pneumatic or hydraulic means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/003—Generation of the force
    • G01N2203/0042—Pneumatic or hydraulic means
    • G01N2203/0048—Hydraulic means

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

946,415. Hydraulic-load testing of materials. LOSENHAUSENWERK DUSSELDORFER MASCHINENBAU A.G. April 4,1961 [April 2, 1960], No. 11931/61. Heading G1S. The loading pump 1 for a piston 15 of a hydraulic materials-testing device supplies pressure when a control cylinder 6 is actuated (as shown), and is reversed by a control cylinder 6<SP>1</SP>, the cylinders 6 and 6<SP>1</SP> being selectively connected to an auxiliary pump 11 by a slide-valve 7 when the pressure reaches predetermined minimum and maximum values respectively. Slide-valve 7 moves upwardly, under spring-loading 22, when the pressure in chamber 21 is removed by the opening of valve 19<SP>1</SP> by a member 18 carried by the piston, whereby 6<SP>1</SP> is pressurized. As the piston withdraws under the action of springs 16, 16<SP>1</SP>, valve 19 will be opened and chamber 21 pressurized through pipe 20. Thus 6 will be priasurized, piston 15 loaded and the process will be repeated. The slopes of the stress waveform (Fig. 3) depends on the magnitude of the positive and negative parts of the loading cycle of pump 1 and these are adjustable by means of the stops 4,4<SP>1</SP>. The sharpness of the peaks depends on the relaxation time of the cylinders 6 and 6<SP>1</SP> which can be controlled by means of throttles 10, 10<SP>1</SP> on the outlets 9, 9<SP>1</SP> of the cylinders, throttle 14, and the control member 12 of the auxiliary pump output. The single test cylinder may be. replaced by an alternating stress system comprising two cylinders on either side of the piston 15.
GB1193161A 1960-04-02 1961-04-04 Testing apparatus for use with a hydraulic load device Expired GB946415A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEL35802A DE1199021B (en) 1960-04-02 1960-04-02 Hydraulic surge or alternating load device for material testing systems with auxiliary power control

Publications (1)

Publication Number Publication Date
GB946415A true GB946415A (en) 1964-01-15

Family

ID=7267229

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1193161A Expired GB946415A (en) 1960-04-02 1961-04-04 Testing apparatus for use with a hydraulic load device

Country Status (3)

Country Link
CH (1) CH387982A (en)
DE (1) DE1199021B (en)
GB (1) GB946415A (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE537328C (en) * 1929-08-16 1931-11-02 Maschf Augsburg Nuernberg Ag Equipment on material testing machines operated by pressurized fluid or the like for carrying out endurance tests
CH154863A (en) * 1929-12-16 1932-05-31 Losenhausenwerk Duesseldorfer Process for generating periodically changing loads on test specimens in a hydraulically operated materials testing machine and device for carrying out this process.

Also Published As

Publication number Publication date
DE1199021B (en) 1965-08-19
CH387982A (en) 1965-02-15

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