ES2350661B1 - SIMULTANEOUS TEST PROCEDURE FOR THE FATIGUE CHARACTERIZATION OF MATERIALS TREATED WITH HYDRAULIC CONGLOMERANTS WITH THE USE OF THREE PRISMATIC TESTS. - Google Patents
SIMULTANEOUS TEST PROCEDURE FOR THE FATIGUE CHARACTERIZATION OF MATERIALS TREATED WITH HYDRAULIC CONGLOMERANTS WITH THE USE OF THREE PRISMATIC TESTS. Download PDFInfo
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- ES2350661B1 ES2350661B1 ES200801660A ES200801660A ES2350661B1 ES 2350661 B1 ES2350661 B1 ES 2350661B1 ES 200801660 A ES200801660 A ES 200801660A ES 200801660 A ES200801660 A ES 200801660A ES 2350661 B1 ES2350661 B1 ES 2350661B1
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- 238000012360 testing method Methods 0.000 title claims abstract description 27
- 239000000463 material Substances 0.000 title claims abstract description 15
- 238000012512 characterization method Methods 0.000 title claims abstract description 12
- 238000010998 test method Methods 0.000 title claims abstract description 10
- 239000011230 binding agent Substances 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 7
- 239000003351 stiffener Substances 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 3
- 238000009661 fatigue test Methods 0.000 claims 1
- 210000004417 patella Anatomy 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract 1
- 238000007676 flexural strength test Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 241001122767 Theaceae Species 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
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- 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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- 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
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
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- 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)
Abstract
Dispositivo y procedimiento simultáneo de ensayo para la caracterización a fatiga de materiales tratados con conglomerantes hidráulicos con el empleo de tres probetas prismáticas.Device and simultaneous test procedure for fatigue characterization of materials treated with Hydraulic binders with the use of three specimens binoculars
Procedimiento simultáneo de ensayo para la caracterización a fatiga de materiales tratados con conglomerantes hidráulicos con el empleo de tres probetas prismáticas y dispositivo para llevar a cabo dicho procedimiento con forma de trípode construido mediante 3 brazos (1, 2) constituidos por perfiles metálicos IPN-100 y chapas auxiliares de 5 y 6 mm de espesor para la construcción del nudo central (8) y los rigidizadores (9) respectivamente que permite trasmitir una tercera parte de la carga proporcionada por la prensa a cada probeta (4) gracias a la geometría del dispositivo, al hecho de ser un mecanismo isostático y por la rótula situada en el actuador dinámico.Simultaneous test procedure for Fatigue characterization of materials treated with binders hydraulics with the use of three prismatic specimens and device to carry out said tripod procedure built using 3 arms (1, 2) consisting of profiles IPN-100 metallic and auxiliary plates of 5 and 6 mm of thickness for the construction of the central node (8) and the stiffeners (9) respectively that allows transmitting a third part of the load provided by the press to each test tube (4) thanks to the geometry of the device, to the fact of being a mechanism isostatic and by the kneecap located in the dynamic actuator.
Description
Dispositivo y procedimiento simultáneo de ensayo para la caracterización a fatiga de materiales tratados con conglomerantes hidráulicos con el empleo de tres probetas prismáticas.Device and simultaneous test procedure for fatigue characterization of materials treated with Hydraulic binders with the use of three specimens binoculars
La presente invención se encuadra en el sector de la investigación de las propiedades mecánicas de los materiales sólidos por aplicación de una incitación mecánica.The present invention falls within the sector of the investigation of the mechanical properties of materials solids by application of a mechanical incitement.
La invención consiste en un nuevo dispositivo y procedimiento de ensayo para la caracterización a fatiga en flexotracción de materiales tratados con conglomerantes hidráulicos, con la ventaja de que es posible ensayar 3 probetas prismáticas con un solo actuador dinámico.The invention consists of a new device and test procedure for fatigue characterization in flexotraction of materials treated with hydraulic binders, with the advantage that it is possible to test 3 prismatic specimens with Single dynamic actuator
El procedimiento permite determinar el número de ciclos de carga que es capaz de soportar el material ensayado hasta su rotura. Por otro lado, facilita una mejor optimización de la prensa dinámica dado que reduce el tiempo necesario para la realización del ensayo con respecto al procedimiento convencional.The procedure allows to determine the number of load cycles that is able to withstand the tested material up to its breakage On the other hand, it facilitates better optimization of the dynamic press because it reduces the time needed for conduct of the test with respect to the procedure conventional.
El procedimiento de ensayo que se emplea
actualmente consiste en la realización del ensayo de caracterización
a fatiga en flexotracción con una sola probeta prismática colocada
bajo el actuador dinámi-
co.The test procedure currently used is the performance of the fatigue characterization test in flexotraction with a single prismatic specimen placed under the dynamic actuator.
co.
La forma de colocar la probeta bajo el actuador se detalla en la Norma UNE-EN 12390-5 - Ensayos de hormigón endurecido. Parte 5: Resistencia a flexotracción de probeta prismáticas-. Esta norma se refiere a los ensayos estáticos de resistencia a flexotracción de probetas prismáticas. El procedimiento de ensayo detallado en la Norma, se refiere a ensayos de resistencia a flexotracción estáticos, pero la forma de colocar las probetas bajo el actuador es idéntica para el caso de fatiga.How to place the specimen under the actuator It is detailed in the UNE-EN Standard 12390-5 - Hardened concrete tests. Part 5: Flexural strength of prismatic specimen. This rule is refers to static flexural strength tests of prismatic specimens The test procedure detailed in the Standard, refers to flexural strength tests static, but the way to place the specimens under the actuator is identical for fatigue.
La norma permite que la carga se aplique mediante uno o dos rodillos en la parte superior de la probeta, y especifica la posición de los dos rodillos inferiores.The standard allows the load to be applied by one or two rollers on the top of the specimen, and Specifies the position of the two lower rollers.
Con la técnica usada actualmente, los ensayos de fatiga en flexotracción requieren mucho tiempo ya que cada probeta puede estar sometida a ciclos de carga durante varios días hasta su rotura. Por otro lado, la prensa dinámica permanece inutilizada para otro tipo de ensayos durante un largo periodo, lo cual limita su aprovechamiento.With the technique currently used, the tests of Flexotraction fatigue requires a lot of time since each test tube may be subject to charge cycles for several days until break. On the other hand, the dynamic press remains unused for other types of trials over a long period, which limits their exploitation.
En el proceso actual se consume una gran cantidad de energía ya que la prensa dinámica trabaja durante un largo periodo de tiempo. Para cargas pequeñas, es posible que la sensibilidad de la prensa dinámica no sea suficiente y se tenga que optar por prensas que apliquen cargas menores o que tengan una sensibilidad mayor.In the current process a large amount of energy since the dynamic press works during a Long period of time. For small loads, it is possible that the Dynamic press sensitivity is not enough and you have to opt for presses that apply smaller loads or have a increased sensitivity
El procedimiento de ensayo objeto de la presente invención evita los inconvenientes anteriormente enunciados.The test procedure object of the present The invention avoids the aforementioned inconveniences.
El procedimiento consiste en la utilización de un dispositivo en forma de trípode construido mediante perfiles metálicos IPN-100 y chapas auxiliares de 5 y 6 mm de espesor.The procedure consists in the use of a tripod-shaped device built using profiles IPN-100 metallic and auxiliary plates of 5 and 6 mm of thickness.
Este dispositivo permite trasmitir la carga desde el actuador a cada una de las tres probetas ensayadas. Una tercera parte de la carga proporcionada por la prensa llega a cada probeta.This device allows transmitting the load from the actuator to each of the three test specimens tested. A third part of the load provided by the press reaches each test tube.
El reparto equitativo de la carga viene dado por la geometría del dispositivo, por el hecho de ser un mecanismo isostático y por la rótula situada en el actuador dinámico.The equitable distribution of the load is given by the geometry of the device, because it is a mechanism isostatic and by the kneecap located in the dynamic actuator.
Para completar la descripción que se está realizando y con objeto de ayudar a una mejor comprensión de la invención, se acompaña como parte integrante de dicha descripción, un conjunto de dibujos en donde, con carácter ilustrativo y no limitativo, se ha representado lo siguiente:To complete the description that is being performing and in order to help a better understanding of the invention is accompanied as an integral part of said description, a set of drawings where, for illustrative purposes and not limiting, the following has been represented:
Figuras 1a y 1b: Muestran sendas vistas en
alzado y en planta del dispositivo de ensayo respectivamen-
te.Figures 1a and 1b: They show elevational and plan views of the respective test device.
tea.
Figura 2: Muestra una vista en alzado del dispositivo de ensayo de la invención junto con las probetas prismáticas.Figure 2: Shows an elevation view of the test device of the invention together with the specimens binoculars
Figuras 3a y 3b: Muestran sendas representaciones detalladas del nudo central del trípode del dispositivo de la invención.Figures 3a and 3b: Show paths detailed representations of the central knot of the tripod of the device of the invention.
El dispositivo propuesto consiste en un trípode compuesto por un brazo principal (1) y dos brazos secundarios (2). Todos los brazos están fabricados con perfiles metálicos IPN-100. Los 3 brazos están unidos entre sí mediante soldadura por el nudo central (8) fabricado mediante chapas (3) de 5 mm de espesor. La aplicación de las cargas a cada probeta (4) se materializa mediante rodillos (9) con un diámetro comprendido entre 20 y 40 mm. Dichos rodillos (9) se colocan bajo los brazos (1, 2) disponiéndose unos rigidizadores (5) verticales de 6 mm de espesor dentro de los perfiles y en la vertical de los rodillos (9). El trípode descrito se coloca bajo el actuador dinámico mediante una unión atornillada (6).The proposed device consists of a tripod composed of a main arm (1) and two secondary arms (2). All arms are made of metal profiles IPN-100 The 3 arms are linked together by welding by the central node (8) manufactured by plates (3) of 5 mm thick The application of the loads to each test piece (4) is materialized by rollers (9) with a diameter between 20 and 40 mm Said rollers (9) are placed under the arms (1, 2) having vertical stiffeners (5) 6 mm thick inside the profiles and in the vertical of the rollers (9). He described tripod is placed under the dynamic actuator by means of a screw connection (6).
En la Fig. 2 se muestra en planta el dispositivo de ensayo junto con las probetas (4) de material tratado con conglomerantes hidráulicos. Se detalla la posición de los rodillos (9) y del nudo central (8).In Fig. 2 the device is shown in plan test together with the specimens (4) of material treated with hydraulic binders The position of the rollers is detailed (9) and the central node (8).
La configuración geométrica en forma de pentágono del nudo central (8) puede verse en la figura 3, en donde además se aprecian las chapas que lo conforman.The geometric configuration in the form of pentagon of the central node (8) can be seen in figure 3, where In addition, the veneers that make it up are appreciated.
Para la realización del procedimiento de ensayo propuesto es necesario disponer de 3 probetas (4) prismáticas (600 x 150 x 150 mm) de material tratado con conglomerante hidráulico apoyadas sobre 2 rodillos (9) metálicos cada una y colocadas como se indica en la figura 2.For the performance of the test procedure It is necessary to have 3 (4) prismatic (600 x) specimens 150 x 150 mm) of material treated with hydraulic binder supported on 2 metal rollers (9) each and placed as indicated in figure 2.
Las probetas (4) se colocan a la altura necesaria para permitir que el trípode llegue a contactar con la cara superior de las mismas. Esta altura dependerá de la altura del pórtico de la prensa y del recorrido que tenga el actuador dinámico.The specimens (4) are placed at the height necessary to allow the tripod to contact the upper face of them. This height will depend on the height of the gantry of the press and of the route that the actuator has dynamic.
Los rodillos (9) inferiores sobre los que se apoyan las probetas (4) tienen un diámetro comprendido entre 20 y 40 mm y están colocados a 75 mm del borde de las probetas (4) (Norma UNE-EN 12390-5. Ensayos de hormigón endurecido. Parte 5: Resistencia a flexotracción de probeta prismáticas).The lower rollers (9) on which they support the test pieces (4) have a diameter between 20 and 40 mm and are placed 75 mm from the edge of the specimens (4) (Standard UNE-EN 12390-5. Concrete testing hard. Part 5: Test tube flexural strength binoculars).
El rodillo superior que transmite la carga a las probetas (4) se coloca centrado en la longitud de las mismas (300 mm desde los bordes).The upper roller that transmits the load to the specimens (4) are placed centered on their length (300 mm from the edges).
Una vez colocadas las probetas (4) y el trípode, es necesario comprobar que el rodillo superior esté en la posición correcta respecto a las 3 probetas (2) y en contacto con la cara superior de las mismas.Once the specimens (4) and the tripod are placed, it is necessary to check that the upper roller is in position correct with respect to the 3 test pieces (2) and in contact with the face top of them.
Tras la colocación del trípode y las probetas
(4), se selecciona la carga y la frecuencia y se da comienzo al
ensayo de fatiga en flexotracción. El ensayo durará hasta que todas
las probetas comiencen a fisurar-
se.After placement of the tripod and the specimens (4), the load and frequency are selected and the fatigue flexion test begins. The test will last until all the specimens begin to crack.
be.
Para la fabricación del trípode (Fig. 1) son necesarios los siguientes elementos:For the manufacture of the tripod (Fig. 1) they are The following elements are necessary:
- --
- 1 perfil IPN-100 con una longitud de 572,8 mm para el brazo principal (1);one IPN-100 profile with a length of 572.8 mm for the main arm (1);
- --
- 2 perfiles IPN-100 con una longitud de 354,7 mm para los brazos secundarios (2);2 IPN-100 profiles with a length of 354.7 mm for the secondary arms (2);
- --
- 12 chapas (5) de 75 x 22 mm y 6 mm de espesor (para los rigidizadores; y12 sheets (5) 75 x 22 mm and 6 mm thick (for stiffeners; Y
- --
- Varias chapas (3) de 5 mm de espesor para el nudo central (8).Several plates (3) 5 mm thick for the central node (8).
La unión de los brazos (1, 2) con el núcleo central (8), los rigidizadores y el nudo central (8) se materializará mediante soldadura.The union of the arms (1, 2) with the core center (8), the stiffeners and the center knot (8) are will materialize by welding.
La unión del trípode con el actuador se ajustará con tornillos (6) y los rodillos (9) se unirán con los perfiles IPN-100 mediante mordazas metálicas.The tripod joint with the actuator will be adjusted with screws (6) and rollers (9) will join with the profiles IPN-100 through metal jaws.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES200801660A ES2350661B1 (en) | 2008-02-26 | 2008-02-26 | SIMULTANEOUS TEST PROCEDURE FOR THE FATIGUE CHARACTERIZATION OF MATERIALS TREATED WITH HYDRAULIC CONGLOMERANTS WITH THE USE OF THREE PRISMATIC TESTS. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES200801660A ES2350661B1 (en) | 2008-02-26 | 2008-02-26 | SIMULTANEOUS TEST PROCEDURE FOR THE FATIGUE CHARACTERIZATION OF MATERIALS TREATED WITH HYDRAULIC CONGLOMERANTS WITH THE USE OF THREE PRISMATIC TESTS. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| ES2350661A1 ES2350661A1 (en) | 2011-01-26 |
| ES2350661B1 true ES2350661B1 (en) | 2011-09-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES200801660A Active ES2350661B1 (en) | 2008-02-26 | 2008-02-26 | SIMULTANEOUS TEST PROCEDURE FOR THE FATIGUE CHARACTERIZATION OF MATERIALS TREATED WITH HYDRAULIC CONGLOMERANTS WITH THE USE OF THREE PRISMATIC TESTS. |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4941359A (en) * | 1989-02-02 | 1990-07-17 | The United States Of America As Represented By The Secretary Of The Army | Articulating flexure test fixture |
| GB9905739D0 (en) * | 1999-03-15 | 1999-05-05 | Secr Defence | Bend test assembly |
| CA2342119A1 (en) * | 2001-03-23 | 2002-09-23 | Universite Du Quebec A Montreal (Uqam) | Automation of the water absorption test in porous materials |
| CN101281109B (en) * | 2008-05-26 | 2011-02-09 | 安东石油技术（集团）有限公司 | Experimental device for evaluating pumping oil polish rod coating for fatigue strength influence |
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| ES2350661A1 (en) | 2011-01-26 |
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