FR2680003A1 - Test system for vibrational fatigue with non-zero average load - Google Patents

Test system for vibrational fatigue with non-zero average load Download PDF

Info

Publication number
FR2680003A1
FR2680003A1 FR9109906A FR9109906A FR2680003A1 FR 2680003 A1 FR2680003 A1 FR 2680003A1 FR 9109906 A FR9109906 A FR 9109906A FR 9109906 A FR9109906 A FR 9109906A FR 2680003 A1 FR2680003 A1 FR 2680003A1
Authority
FR
France
Prior art keywords
vibrations
displacement
fatigue
test piece
amplitude
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.)
Granted
Application number
FR9109906A
Other languages
French (fr)
Other versions
FR2680003B1 (en
Inventor
Bathias Claude
Billmann Andre
Wu Tieying
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR9109906A priority Critical patent/FR2680003B1/en
Publication of FR2680003A1 publication Critical patent/FR2680003A1/en
Application granted granted Critical
Publication of FR2680003B1 publication Critical patent/FR2680003B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G01N3/38—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by electromagnetic 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
    • G01N2203/0001—Type of application of the stress
    • G01N2203/0003—Steady
    • 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
    • G01N2203/0001—Type of application of the stress
    • G01N2203/0005—Repeated or cyclic
    • 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
    • G01N2203/0001—Type of application of the stress
    • G01N2203/0005—Repeated or cyclic
    • G01N2203/0008—High frequencies from 10 000 Hz
    • 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
    • G01N2203/0014—Type of force applied
    • G01N2203/0016—Tensile or compressive
    • 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
    • G01N2203/0014—Type of force applied
    • G01N2203/0023—Bending
    • 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
    • G01N2203/005—Electromagnetic 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
    • G01N2203/005—Electromagnetic means
    • G01N2203/0051—Piezoelectric 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
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/06—Indicating or recording means; Sensing means
    • G01N2203/0641—Indicating or recording means; Sensing means using optical, X-ray, ultraviolet, infrared or similar detectors
    • 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
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/06—Indicating or recording means; Sensing means
    • G01N2203/067—Parameter measured for estimating the property
    • G01N2203/0682—Spatial dimension, e.g. length, area, angle

Abstract

The present invention relates to the production of a device and a method allowing the fatigue study of materials used by the industry of gas turbines or the space industry. The device includes a hydraulic jack 14 which makes it possible to exert either a constant tension or a set cyclic tension, two ultrasonic resonators 3 and 8 slaved to frequencies lying between 10 and 100 kHz, two displacement amplifiers 50 and 51, consisting of a cylindrical part extended by a part having a chain profile, an original static force transmission system, consisting of a steel frame 4 called the stirrup piece and an optical device 7 intended to measure the vibrational amplitude. This machine makes it possible simultaneously to apply, to a test piece 6, a constant or slowly varying tensile force and longitudinal and/or transverse vibrational fatigue forces of adjustable amplitude.

Description

SYSTEME D'ESSAI POUR FATIGUE VIBRATOIRE
A CHARGE MOYENNE NON NULLE
La présente invention est relative à la réalisation d'un dispositif et d'un procédé de mise en oeuvre destinés à étudier la fatigue vibratoire des matériaux, à des fréquences supérieures au kilohertz, sous une charge moyenne non nulle.TEST SYSTEM FOR VIBRATORY FATIGUE
WITH NON-NULL AVERAGE LOAD
The present invention relates to the production of a device and an implementation method intended to study the vibratory fatigue of materials, at frequencies greater than one kilohertz, under a non-zero average load.

Depuis longtemps on a cherché à caractériser les propriétés mécaniques des matériaux, notamment leur résistance à la traction et leur charge de rupture. It has long been sought to characterize the mechanical properties of materials, in particular their tensile strength and their breaking load.

Plus récemment on a reconnu l'importance en fatigue, de l'action d'efforts cycliques lents associés à des vibrations. More recently, the importance in fatigue has been recognized of the action of slow cyclic forces associated with vibrations.

Ainsi est-il intéressant d'étudier la fatigue vibratoire pour une charge moyenne non nulle ou bien de superposer un endommagement de fatigue vibratoire à un endommagement de fatigue lente. Thus it is interesting to study the vibratory fatigue for a nonzero average load or to superimpose a damage of vibratory fatigue on a damage of slow fatigue.

Actuellement, on utilise: - soit des machines superposant une charge constante et une fatigue vibratoire de faible fréquence, inférieure à 100 hertz, - soit des machines vibratoires de fréquence ultrasonore, de l'ordre de 20 kHz, mais à charge moyenne nulle: l'une des extrémités de l'éprouvette est fixée à une sonotrode, tandis que l'autre extrémité vibre librement. Currently, we use: - either machines superimposing a constant load and a vibration fatigue of low frequency, less than 100 hertz, - or vibration machines of ultrasonic frequency, of the order of 20 kHz, but at zero average load: l one end of the test piece is attached to a sonotrode, while the other end vibrates freely.

Dans le premier cas il faut 110 jours pour effectuer 108 cycles de fatigue alors que dans le second cas il suffit de 3 heures. Les essais sont plus rapides et parfois plus proches des conditions réelles mais malheureusement la charge moyenne est nulle. In the first case, it takes 110 days to perform 108 fatigue cycles, while in the second case it takes just 3 hours. The tests are faster and sometimes closer to real conditions but unfortunately the average load is zero.

Afin de répondre aux exigences posées par l'industrie des turbines à gaz et par l'industrie spatiale, nous avons conçu, calculé et construit un nouveau dispositif qui permet, de soumettre des éprouvettes à: - une traction constante, ajustable entre 0 et 100 kN, - une contrainte vibratoire, dans une gamme de fréquences comprises entre 10 et 100 kHz, produite par des ondes de déplacement longitudinal et/ou des ondes de déplacement transversal, - des températures comprises entre -160 et +1000 degrés celsius. In order to meet the requirements posed by the gas turbine industry and by the space industry, we have designed, calculated and built a new device which makes it possible to submit test pieces to: - constant traction, adjustable between 0 and 100 kN, - a vibrational stress, in a frequency range between 10 and 100 kHz, produced by waves of longitudinal displacement and / or waves of transverse displacement, - temperatures between -160 and +1000 degrees celsius.

Le dispositif, qui fait l'objet de l'invention, comporte quatre parties: - une machine de traction qui permet d'exercer soit une traction constante, soit une traction cyclique imposée, - un premier résonateur ultrasonore, asservi sur une fréquence comprise entre 10 et 100 kHz, qui engendre des vibrations de déplacement longitudinal, - deux amplificateurs de déplacement constitués d'une partie cylindrique prolongée par une section ayant un profil de chaînette, entre lesquels est placée l'éprouvette à étudier, - un système de transmission des effets statiques, appelé "étrier", qui se présente sous la forme d'un cadre en acier et permet d'appliquer à l'éprouvette un effort de traction sans gêner le fonctionnement du résonateur produisant les vibrations. The device, which is the subject of the invention, comprises four parts: - a traction machine which makes it possible to exert either a constant traction, or an imposed cyclic traction, - a first ultrasonic resonator, controlled on a frequency between 10 and 100 kHz, which generates vibrations of longitudinal displacement, - two displacement amplifiers consisting of a cylindrical part extended by a section having a chain profile, between which is placed the test specimen to be studied, - a system for transmitting static effects, called "stirrup", which is in the form of a steel frame and makes it possible to apply a tensile force to the test piece without interfering with the operation of the resonator producing the vibrations.

Les trois premières parties sont connues et/ou commercialisées. C'est leur association qui, avec l"'étrier", constitue l'essentiel de l'invention. Les dimensions des différentes parties entrant en vibration ont été déterminées par un calcul original. The first three parts are known and / or marketed. It is their association which, with the "stirrup", constitutes the essence of the invention. The dimensions of the various parts entering into vibration were determined by an original calculation.

Une détection optique par fibre optique et/ou faisceau laser permet de mesurer l'amplitude des vibrations à l'une des extrémités de l'éprouvette coïncidant avec un ventre de déplacement. An optical detection by optical fiber and / or laser beam makes it possible to measure the amplitude of the vibrations at one of the ends of the test piece coinciding with a displacement belly.

Un second résonateur, également asservi en fréquence, peut éventuellement être utilisé, dans la même structure ou dans une variante, pour soumettre l'éprou vette à l'action simultanée ou séparée de vibrations de déplacement transversal. Alors un ou deux barreaux cylindriques de longueur appropriées sont éventuellement ajoutés à la structure vibrante. A second resonator, also frequency controlled, can optionally be used, in the same structure or in a variant, to subject the test piece to the simultaneous or separate action of vibrations of transverse displacement. Then one or two cylindrical bars of appropriate length are possibly added to the vibrating structure.

L'éprouvette peut également être placée sous atmosphère contrôlée, dans une enceinte cryogénique ou un four à induction. The test piece can also be placed under a controlled atmosphere, in a cryogenic enclosure or an induction furnace.

L'invention sera mieux comprise en se référant aux figures 1 à 6. The invention will be better understood by referring to Figures 1 to 6.

La figure 1 représente une vue d'ensemble et le principe du dispositif. L'enceinte cryogénique (ou le four à induction), qui entoure l'éprouvette, n'a pas été représenté.)
La figure 2 représente, à l'intérieur de l'étrier, le résonateur qui engendre les vibrations de déplacement longitudinal.Figure 1 shows an overview and the principle of the device. The cryogenic enclosure (or the induction furnace), which surrounds the test piece, has not been shown.)
FIG. 2 represents, inside the stirrup, the resonator which generates the vibrations of longitudinal displacement.

La figure 3 représente l'éprouvette du matériau étudié, fixée par vissage entre les deux amplificateurs de déplacement et soumise à l'effort de traction transmis par le vérin hydraulique au moyen de l'étrier. FIG. 3 represents the test tube of the material studied, fixed by screwing between the two displacement amplifiers and subjected to the tensile force transmitted by the hydraulic cylinder by means of the stirrup.

La figure 4 représente un exemple de montage permettant de soumettre l'éprouvette à l'action de vibrations transversales à l'aide d'un second résonateur piézoélectrique. FIG. 4 represents an example of assembly making it possible to subject the test piece to the action of transverse vibrations using a second piezoelectric resonator.

La figure 5 représente la répartition du déplacement et de la contrainte vibratoires, le long du système, sous l'action de vibrations longitudinales, tandis que la figure 6 montre cette répartition dans le cas de vibrations transversales. FIG. 5 shows the distribution of the vibration displacement and stress, along the system, under the action of longitudinal vibrations, while FIG. 6 shows this distribution in the case of transverse vibrations.

La machine de traction est constitué de deux parties: - un socle 10 qui contient l'ensemble des mécanismes de
pression et notamment
les cylindres produisant le déplacement simultané et
équilibré des pistons 11 et 12,
un vérin hydraulique 14 portant le filetage 15 sur
lequel se visse l'étrier 4, - un cadre constitué
par la poutre métallique 13 qui porte un capteur dy
namométrique 2,
les deux pistons 11 et 12, solidaires de la poutre
13, et qui la font mouvoir en la rapprochant ou en
l'éloignant du socle 10.The traction machine consists of two parts: - a base 10 which contains all of the
pressure and in particular
the cylinders producing the simultaneous displacement and
balanced pistons 11 and 12,
a hydraulic cylinder 14 carrying the thread 15 on
which is screwed the bracket 4, - a frame made
by the metal beam 13 which carries a sensor dy
namometric 2,
the two pistons 11 and 12, integral with the beam
13, and which make it move by bringing it closer or by
away from the base 10.

Le capteur dynamomètrique 2 permet de mesurer les efforts de traction monotones ou cycliques. The dynamometric sensor 2 makes it possible to measure the monotonic or cyclic traction forces.

L'éprouvette 6 possède, dans sa partie centrale, un amincissement 61 ayant un profil de chaînette, au milieu duquel une encoche 62 permet d'amorcer la fissuration de rupture. Elle est fixée par vissage aux extrémités respectives 54 et 55 des amplificateurs de vibration, supérieur 50 et inférieur 51. The test piece 6 has, in its central part, a thinning 61 having a chain profile, in the middle of which a notch 62 makes it possible to initiate the cracking of rupture. It is fixed by screwing to the respective ends 54 and 55 of the vibration amplifiers, upper 50 and lower 51.

Les amplificateurs ont pour but d'augmenter l'amplitude des vibrations de déplacement et sont constitués d'une partie cylindrique 52 et d'une partie 53 à profil de chaînette. En outre l'amplificateur de vibrations supérieur 50 possède un filetage 56 qui permet de le fixer au dynamomètre 2. De plus l'amplificateur de déplacement inférieur 51 et la masse 32 du résonateur sont tournés dans la même pièce afin d'éviter toute atténuation des vibrations. The purpose of the amplifiers is to increase the amplitude of the displacement vibrations and consist of a cylindrical part 52 and a part 53 with a chain profile. In addition, the upper vibration amplifier 50 has a thread 56 which makes it possible to fix it to the dynamometer 2. In addition, the lower displacement amplifier 51 and the mass 32 of the resonator are rotated in the same part in order to avoid any attenuation of the vibrations.

L'étrier 4 est percé, à sa partie supérieure, d'un trou, 41 au travers duquel passe la partie cylindrique 52 de l'amplificateur de vibration inférieur 51 et sur le bord duquel s'appuie l'épaulement 34 du résonateur 3; il posséde, à sa partie inférieure, un trou fileté qui permet de de le visser sur le pas de vis 15. The stirrup 4 is pierced, at its upper part, with a hole, 41 through which the cylindrical part 52 of the lower vibration amplifier 51 passes and on the edge of which the shoulder 34 of the resonator 3 rests; it has, at its lower part, a threaded hole which makes it possible to screw it on the thread 15.

Lorsque le vérin 14 tire l'étrier 4 vers le bas, ce dernier transmet l'effort de traction à l'éprouvette 6 par l'intermédiaire de l'épaulement 34 et de l'amplificateur de déplacement inférieur 51. Cet effort de traction est transmis, par l'intermédiaire de l'amplifica- teur de déplacement supérieur 51, au dynamométre 2 fixé à la poutre 13. When the jack 14 pulls the stirrup 4 downwards, the latter transmits the tensile force to the specimen 6 via the shoulder 34 and the lower displacement amplifier 51. This tensile force is transmitted, via the upper displacement amplifier 51, to the dynamometer 2 fixed to the beam 13.

Dans la version préférentielle, le résonateur est constitué des céramiques piézoélectriques 33, comprimées entre les masses 31 et 32. In the preferred version, the resonator consists of piezoelectric ceramics 33, compressed between the masses 31 and 32.

Les vibrations de déplacement longitudinal produites par le résonateur 3, passent de la masse 32 à l'amplificateur de déplacement 51 qui les amplifie et les transmet à l'éprouvette 6.The longitudinal displacement vibrations produced by the resonator 3 pass from the mass 32 to the displacement amplifier 51 which amplifies them and transmits them to the test tube 6.

L'ensemble du dispositif est calculé pour que le milieu de l'éprouvette, au niveau de l'encoche 62, soit un noeud de déplacement (ventre de contrainte) et que les extrémités 63 et 64 soient des ventres de déplacement longitudinal (noeuds de contrainte). The entire device is calculated so that the middle of the specimen, at the level of the notch 62, is a displacement node (constraint belly) and that the ends 63 and 64 are bellies of longitudinal displacement (nodes of constraint).

Le dispositif optique 7 a pour but de mesurer l'amplitude des déplacements au niveau de l'extrémité 64 de l'éprouvette 6; cette mesure permet de caractériser la fatigue vibratoire. The aim of the optical device 7 is to measure the amplitude of the displacements at the end 64 of the test piece 6; this measurement characterizes the vibration fatigue.

Dans un autre type de montage, l'éprouvette 6 est soumise à l'action simultanée ou séparée: - des vibrations de déplacement longitudinal produites par le résonateur 3, - des vibrations de déplacement transversal engendrées par un second résonateur 8 agissant sur une barre 9. In another type of assembly, the test piece 6 is subjected to the simultaneous or separate action: - vibrations of longitudinal displacement produced by the resonator 3, - vibrations of transverse displacement generated by a second resonator 8 acting on a bar 9 .

La barre 9 et les amplificateurs 50 et 51 sont alors calculés de façon que, pour un effort de traction déterminé: - dans le cas des vibrations longitudinales, les extrémités 63 et 64 de l'éprouvette 6 soient toujours des ventres de déplacement, et que son milieu, au niveau de l'encoche 62, reste un ventre de contrainte, - dans le cas des vibrations transversales, les extrémités 63 et 64 de l'éprouvette 6 soient des noeuds de déplacement, et que son milieu, au niveau de l'encoche 62 devienne un ventre de contrainte.  The bar 9 and the amplifiers 50 and 51 are then calculated so that, for a determined tensile force: - in the case of longitudinal vibrations, the ends 63 and 64 of the test piece 6 are always displacement bellies, and that its middle, at the notch 62, remains a stress belly, - in the case of transverse vibrations, the ends 63 and 64 of the test piece 6 are displacement nodes, and that its middle, at the level of l notch 62 becomes a constraint belly.

Ainsi l'invention permet l'étude de matériaux utilisés par l'industrie des turbines à gaz ou l'industrie spatiale, par un endommagement dû au cumul de fatigue lente et de fatigue vibratoire.  Thus, the invention allows the study of materials used by the gas turbine industry or the space industry, by damage due to the accumulation of slow fatigue and vibration fatigue.

Claims (6)

REVENDICATIONS 1. Dispositif permettant l'étude de matériaux, en fatigue, caractérisé en ce qu'il comporte: - une machine de traction constituée d'un socle 10, de deux pistons 11 et 12 reliés à une poutre 13, équipée d'un vérin hydraulique 14, permettant d'exercer soit une traction constante, soit une traction cyclique imposée, et d'un dynamomètre 2 permettant de mesurer et de contrôler ces efforts, - un résonateur 3 ultrasonore, asservi sur une fréquence comprise entre 10 et 100 kHz, destiné à engendrer des vibrations, - deux amplificateurs de déplacement vibrationnel, 50 et 51 constitués d'une partie cylindrique 52 prolongée par une partie 53 ayant un profil de chaînette, - un système original de transmission des effets statiques, constitué d'un cadre en acier 4 appelé "étrier", - un dispositif optique 7 destiné à mesurer l'amplitude des vibrations à l'extrémité 64 de l'éprouvette 6, l'ensemble du dispositif permettant d'appliquer simultanément à l'éprouvette 6: - un effort de traction constant ou variant lentement selon des cycles programmés, engendré par le vérin hydraulique, mesuré et asservi au moyen du dynamométre 2, . transmis à l'éprouvette 6 par l'intermédiaire des am 1. Device allowing the study of materials, in fatigue, characterized in that it comprises: - a traction machine consisting of a base 10, two pistons 11 and 12 connected to a beam 13, equipped with a jack hydraulic 14, making it possible to exert either constant traction or imposed cyclic traction, and a dynamometer 2 making it possible to measure and control these forces, - an ultrasonic resonator 3, controlled on a frequency between 10 and 100 kHz, intended to generate vibrations, - two vibrational displacement amplifiers, 50 and 51 consisting of a cylindrical part 52 extended by a part 53 having a chain profile, - an original system for transmitting static effects, consisting of a frame steel 4 called "stirrup", - an optical device 7 intended to measure the amplitude of the vibrations at the end 64 of the test piece 6, the whole of the device making it possible to apply simultaneously to the test piece 6: - a constant or slowly varying traction force according to programmed cycles, generated by the hydraulic cylinder, measured and controlled by means of the dynamometer 2,. transmitted to test tube 6 via am plificateurs de déplacement 50 et 51 ainsi que de displacement planners 50 and 51 as well as l'étrier 4 associé à l'épaulement 34, - un effort de fatigue vibratoire d'amplitude réglable, engendré par le résonateur 3 asservi sur une fréquence comprise entre 10 et 100 kilohertz et induisant, dans l'éprouvette 6, des vibrations de déplacement, the stirrup 4 associated with the shoulder 34, - a vibration fatigue force of adjustable amplitude, generated by the resonator 3 controlled by a frequency between 10 and 100 kilohertz and inducing, in the test tube 6, displacement vibrations , -la combinaison des efforts de fatigue lente et de fatigue vibratoire.  -the combination of slow fatigue and vibratory fatigue efforts. 2. Dispositif selon la revendication 1, caractérisé en ce qu'il comporte deux amplificateurs de déplacement 50 et 51, constitués d'une partie cylindrique 52 et d'une partie 53 ayant un profil de chaînette, destinés à accroître l'amplitude des vibrations longitudinales dans l'éprouvette 6. 2. Device according to claim 1, characterized in that it comprises two displacement amplifiers 50 and 51, consisting of a cylindrical part 52 and a part 53 having a chain profile, intended to increase the amplitude of the vibrations longitudinal in the test tube 6. 3. Dispositif selon la revendication 1, caractérisé en ce qu'il comporte un appareillage optique 7 destiné à mesurer l'amplitude des vibrations longitudinales au niveau de l'extrémité 64 de l'éprouvette 6. 3. Device according to claim 1, characterized in that it comprises an optical apparatus 7 intended to measure the amplitude of the longitudinal vibrations at the level of the end 64 of the test piece 6. 4. Dispositif selon la revendication 1, caractérisé en ce qu'il est équipé d'une enceinte destinée à maintenir l'éprouvette sous une atmosphère contrôlée, à une température imposée entre -160 et 1000 degrés celsius. 4. Device according to claim 1, characterized in that it is equipped with an enclosure intended to maintain the test piece under a controlled atmosphere, at a temperature imposed between -160 and 1000 degrees celsius. 5. Dispositif selon les revendications 1 et 2, caractérisé en ce que le résonateur 8, asservi sur une fréquence convenable, engendre, dans l'éprouvette 6, des vibrations de déplacement tranversal agissant seules ou simultanément avec les vibrations de déplacement longitudinal engendrées par le résonateur 3. 5. Device according to claims 1 and 2, characterized in that the resonator 8, controlled on a suitable frequency, generates, in the test tube 6, transverse displacement vibrations acting alone or simultaneously with the longitudinal displacement vibrations generated by the resonator 3. 6. Procédé, pour mise en oeuvre du dispositif selon l'ensemble des revendications 1 à 5, caractérisé en ce qu'il consiste à étudier un échantillon d'un matériau, dénommé éprouvette, en lui appliquant simultanément ou séparément les actions suivantes: - un effort de fatigue lente consistant en un effort de traction constant ou cyclique, - un effort de fatigue vibratoire consistant en des vibrations de déplacement longitudinal et/ou des vibrations de déplacement transversal, - un chauffage à une température allant jusqu'à 1000 degrés Celsius ou un refroidissement à une température allant jusqu'à -100 degrés Celsius, - l'action d'une atmosphère contrôlée.  6. Method for implementing the device according to all of claims 1 to 5, characterized in that it consists in studying a sample of a material, called a test tube, by applying to it simultaneously or separately the following actions: - a slow fatigue effort consisting of a constant or cyclic traction effort, - a vibratory fatigue effort consisting of vibrations of longitudinal displacement and / or vibrations of transverse displacement, - heating to a temperature of up to 1000 degrees Celsius or cooling to a temperature down to -100 degrees Celsius, - the action of a controlled atmosphere.
FR9109906A 1991-08-02 1991-08-02 TESTING SYSTEM FOR NON-ZERO AVERAGE LOAD VIBRATORY TIRE. Expired - Fee Related FR2680003B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9109906A FR2680003B1 (en) 1991-08-02 1991-08-02 TESTING SYSTEM FOR NON-ZERO AVERAGE LOAD VIBRATORY TIRE.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9109906A FR2680003B1 (en) 1991-08-02 1991-08-02 TESTING SYSTEM FOR NON-ZERO AVERAGE LOAD VIBRATORY TIRE.

Publications (2)

Publication Number Publication Date
FR2680003A1 true FR2680003A1 (en) 1993-02-05
FR2680003B1 FR2680003B1 (en) 1995-02-24

Family

ID=9415907

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9109906A Expired - Fee Related FR2680003B1 (en) 1991-08-02 1991-08-02 TESTING SYSTEM FOR NON-ZERO AVERAGE LOAD VIBRATORY TIRE.

Country Status (1)

Country Link
FR (1) FR2680003B1 (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2112780A1 (en) * 1995-12-01 1998-04-01 Consejo Superior Investigacion Procedure and device for the non-linear characterization of solid materials.
GB2367631A (en) * 2000-08-09 2002-04-10 Rolls Royce Plc Device and method for fatigue testing a specimen
WO2006077143A1 (en) * 2005-01-21 2006-07-27 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Device for dynamically load testing a sample
WO2007143094A2 (en) * 2006-06-02 2007-12-13 Mts Systems Corporation Measurement of properties of thin specimens based on experimentally acquired force-displacement data
GB2489263A (en) * 2011-03-23 2012-09-26 Rolls Royce Plc Device for fatigue testing a specimen
WO2013014487A1 (en) 2011-07-22 2013-01-31 Snecma An apparatus and method for carrying out in a controlled atmosphere material fatigue tests in a high cycle regime with a controlled strain ratio
CN103091184A (en) * 2013-02-05 2013-05-08 天津天东恒科技发展有限公司 Sub-ultrasonic high-frequency fatigue testing machine
DE102012110811A1 (en) * 2012-11-12 2014-05-15 Technische Universität Kaiserslautern Körperschaft des öffentlichen Rechts Inspection fixture for evaluating fatigue behavior of test specimen i.e. carbon-fiber-reinforced plastic, for aircraft industry, has detecting unit detecting changes in material of test specimen, and oscillating system coupled with specimen
CN106404566A (en) * 2016-12-13 2017-02-15 天津旁耘科技有限公司 Bed fatigue test controller for light, mechanical and electronic integration medical instrument
WO2017135834A1 (en) * 2016-02-04 2017-08-10 Instituto Superior Técnico Equipment for fatigue testing at ultrasonic frequencies in the multiaxial regime-axial and torsional directions
CN109402373A (en) * 2018-12-07 2019-03-01 上海海事大学 A kind of high-frequency vibration Amplitude amplification device of variable cross-section form
CN110108565A (en) * 2019-06-05 2019-08-09 长春浩园试验机有限公司 High frequency composite electron universal testing machine
CN112666018A (en) * 2020-11-03 2021-04-16 四川大学 Ultrasonic frequency mechanical loading fatigue test system for dissimilar metal welded joint
CN114674548A (en) * 2022-05-30 2022-06-28 中国飞机强度研究所 Local vibration load applying system for airplane fatigue strength test and design method thereof

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105136574A (en) * 2015-09-01 2015-12-09 上海大学 Testing system and method of electromagnetic plastic-material high-speed dynamic stretcher
CN108627572B (en) * 2018-05-10 2020-05-05 江苏大学 Ultrasonic cracking test device and method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1652525A (en) * 1922-01-30 1927-12-13 Signal Gmbh Method of testing materials
FR2411402A1 (en) * 1977-12-09 1979-07-06 Bordeaux Talence Ecole Nale Ar Material fatigue testing machine - has specimen end holders mounted by ball and socket couplings to allow application of flexural loads by jacks
AT354146B (en) * 1976-06-21 1979-12-27 Kromp Karl ARRANGEMENT FOR THE TIME-SAVING PERFORMANCE OF SINGLE AND MULTI-STAGE EARNING TESTS
SU1077652A1 (en) * 1982-07-16 1984-03-07 Институт Проблем Прочности Ан Усср Two-stage ultrasonic concentrator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1652525A (en) * 1922-01-30 1927-12-13 Signal Gmbh Method of testing materials
AT354146B (en) * 1976-06-21 1979-12-27 Kromp Karl ARRANGEMENT FOR THE TIME-SAVING PERFORMANCE OF SINGLE AND MULTI-STAGE EARNING TESTS
FR2411402A1 (en) * 1977-12-09 1979-07-06 Bordeaux Talence Ecole Nale Ar Material fatigue testing machine - has specimen end holders mounted by ball and socket couplings to allow application of flexural loads by jacks
SU1077652A1 (en) * 1982-07-16 1984-03-07 Институт Проблем Прочности Ан Усср Two-stage ultrasonic concentrator

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
SOVIET INVENTIONS ILLUSTRATED Section EI, Week D48, 13 Janvier 1982 Derwent Publications Ltd., London, GB; Class S, AN M3619D48 *
SOVIET INVENTIONS ILLUSTRATED Section PQ, Week 8444, Derwent Publications Ltd., London, GB; Class P4, AN 84-274776Ç44! & SU-A-1 077 652 (AS UKR STRENGTH PROBLEMS) 7 Mars 1984 *
ULTRASONICS. vol. 13, no. 1, Janvier 1975, GUILDFORD GB pages 21 - 30; V.A.KUZ'MENKO: 'FATIGUE STRENGTH OF STRUCTURAL MATERIALS AT SONIC AND ULTRASONIC LOADING FRQUENCIES' *

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2112780A1 (en) * 1995-12-01 1998-04-01 Consejo Superior Investigacion Procedure and device for the non-linear characterization of solid materials.
GB2367631A (en) * 2000-08-09 2002-04-10 Rolls Royce Plc Device and method for fatigue testing a specimen
US6732591B2 (en) 2000-08-09 2004-05-11 Rolls-Royce Plc Device and method for fatigue testing of materials
GB2367631B (en) * 2000-08-09 2004-12-22 Rolls Royce Plc A device and method for fatigue testing of materials
WO2006077143A1 (en) * 2005-01-21 2006-07-27 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Device for dynamically load testing a sample
US7770464B2 (en) 2005-01-21 2010-08-10 Fraunhofer-Gesellschaft zur Förderung derangewandten Forschung e.V. Device for dynamically load testing a sample
WO2007143094A2 (en) * 2006-06-02 2007-12-13 Mts Systems Corporation Measurement of properties of thin specimens based on experimentally acquired force-displacement data
WO2007143094A3 (en) * 2006-06-02 2008-05-02 Mts System Corp Measurement of properties of thin specimens based on experimentally acquired force-displacement data
US7441465B2 (en) 2006-06-02 2008-10-28 Agilent Technologies, Inc. Measurement of properties of thin specimens based on experimentally acquired force-displacement data
US8479586B2 (en) 2011-03-23 2013-07-09 Rolls-Royce Plc Device for fatigue testing a specimen
GB2489263A (en) * 2011-03-23 2012-09-26 Rolls Royce Plc Device for fatigue testing a specimen
CN103842795A (en) * 2011-07-22 2014-06-04 斯奈克玛公司 An apparatus and method for carrying out in a controlled atmosphere material fatigue tests in a high cycle regime with a controlled strain ratio
WO2013014487A1 (en) 2011-07-22 2013-01-31 Snecma An apparatus and method for carrying out in a controlled atmosphere material fatigue tests in a high cycle regime with a controlled strain ratio
JP2014521103A (en) * 2011-07-22 2014-08-25 スネクマ Apparatus and method for performing a high cycle material fatigue test at a controlled strain ratio in a controlled atmosphere
DE102012110811B4 (en) * 2012-11-12 2014-12-04 Technische Universität Kaiserslautern Körperschaft des öffentlichen Rechts Test device and method for assessing the fatigue behavior of a test object
DE102012110811A1 (en) * 2012-11-12 2014-05-15 Technische Universität Kaiserslautern Körperschaft des öffentlichen Rechts Inspection fixture for evaluating fatigue behavior of test specimen i.e. carbon-fiber-reinforced plastic, for aircraft industry, has detecting unit detecting changes in material of test specimen, and oscillating system coupled with specimen
CN103091184A (en) * 2013-02-05 2013-05-08 天津天东恒科技发展有限公司 Sub-ultrasonic high-frequency fatigue testing machine
WO2017135834A1 (en) * 2016-02-04 2017-08-10 Instituto Superior Técnico Equipment for fatigue testing at ultrasonic frequencies in the multiaxial regime-axial and torsional directions
CN106404566A (en) * 2016-12-13 2017-02-15 天津旁耘科技有限公司 Bed fatigue test controller for light, mechanical and electronic integration medical instrument
CN109402373A (en) * 2018-12-07 2019-03-01 上海海事大学 A kind of high-frequency vibration Amplitude amplification device of variable cross-section form
CN110108565A (en) * 2019-06-05 2019-08-09 长春浩园试验机有限公司 High frequency composite electron universal testing machine
CN110108565B (en) * 2019-06-05 2024-02-09 长春浩园试验机有限公司 High-frequency composite electronic universal testing machine
CN112666018A (en) * 2020-11-03 2021-04-16 四川大学 Ultrasonic frequency mechanical loading fatigue test system for dissimilar metal welded joint
CN114674548A (en) * 2022-05-30 2022-06-28 中国飞机强度研究所 Local vibration load applying system for airplane fatigue strength test and design method thereof
CN114674548B (en) * 2022-05-30 2022-08-26 中国飞机强度研究所 Local vibration load applying system for airplane fatigue strength test and design method thereof

Also Published As

Publication number Publication date
FR2680003B1 (en) 1995-02-24

Similar Documents

Publication Publication Date Title
FR2680003A1 (en) Test system for vibrational fatigue with non-zero average load
JP6573828B2 (en) A method for determining the non-propagation threshold of fatigue cracks at high frequencies.
US9863859B2 (en) Serpentine load monitoring apparatus
US5520052A (en) Method and apparatus for determining material structural integrity
CN107356419B (en) It is a kind of for measuring the experimental method of rope damping parameter
Kovalik et al. Mechanical loss in fibers for low noise pendulums
EP0603029B1 (en) Device and method for the mechanical testing of fatigue crack growth of road materials
CN110441169A (en) A kind of sound combination electromagnetism load Hopkinson rock bar wave propagation test device
FR2490344A1 (en) METHOD AND DEVICE FOR VERIFYING THE MECHANICAL STATE OF A STRUCTURE
EP2516985A1 (en) Monitoring device for a viscoelastic material
EP0593346A1 (en) Process and device for inspecting a pipeline section by vibration
FR2685773A1 (en) Fretting test machine
FR2462701A1 (en) IMPROVEMENTS ON PINCH VIBRATION VISCOSIMETERS
Šutinys et al. The research of wire rope defect using contactless dynamic method
CN210893971U (en) Dynamic and static combined electromagnetic loading Hopkinson rock rod wave propagation testing device
RU2808953C1 (en) Device for tensile testing of sample of brittle material on hopkinson-kolsky rod
CH378069A (en) Method for measuring the relaxation of metals at high temperature and device for implementing this method
González-Peña et al. Measurement of Young's modulus of cementitious materials using an electro-optic holographic technique
Williams et al. Tensile properties of liquid mercury under pulsed dynamic stressing
RU2773418C1 (en) Device for compression testing of a material sample with hopkinson-kolsky bar
CH426383A (en) Material testing machine
SU1314253A1 (en) Device for studying bauschinger effect in high-speed deforming of solids
EP0469962A1 (en) Method and apparatus for removing an elongate member axially embedded in a tubular pipe
FR2555740A1 (en) Device for continuously monitoring the removal of clinker from coal-fired boilers of thermal power stations
FR2520874A1 (en) Metallic specimen fatigue testing bench - measures energy balance of resonating system with specimen two inertial masses positioned between

Legal Events

Date Code Title Description
ST Notification of lapse