RU1784918C - Device for material penetrating characteristics determining - Google Patents

Description

1

(21) 487695V33

(22) 08.16.90

(I) 12/30/92. Bull. Number 8

(71) Novgorod Polytechnic Institute

(72) N.I. Strabakhin and O.V. Bychkova (56) 1. USSR copyright certificate No. 1002959, cl. G 01 N 33/24, 1981.

2. Autoskor certificate of the USSR No. 765733, cl. G 01 N 33/21, 1978. (DEVICE FOR DETERMINING FOAMING CHARACTERISTICS OF MATERIALS

(57) Use: testing field of building materials, determination of penetration characteristics. SUMMARY OF THE INVENTION: the device comprises two dies, one of which is bulky, the other flat in the form of a plate. Stamps are connected to the frame and load device. A dynamometer is placed between the frame and the stamp in the form of a plate. 1 ill.

The invention relates to test equipment and can be used to determine the penetration characteristics of materials.

A penetrometer is known comprising a cylindrical cup with drainage holes and a cover on which is mounted a cable mechanism with a stamp for creating a seal (1).

The closest known to f claimed is a device for determining the penetration characteristics of materials, containing a base, a stage mounted on the base of the rack, a frame placed on them, a stamp, a container for placing a sample, a load and measuring device (2).

A common disadvantage of the known devices is its inaccuracy in evaluating the behavior of the material, the use of a single container to accommodate the sample and the loading device does not allow to determine

the degree of resistance of the material to various parts of the loader.

The purpose of the invention is to increase the accuracy of determining penetration characteristics.

The goal is achieved in that the device for determining the penetration characteristics of materials, containing a base, a stage mounted on a base, racks, a frame placed on them, a stamp, a container for placing a sample, load / and measuring devices, is equipped with a dynamometer, additional container for the sample and stamp, one of the stamps is made in the form of a prism, the other in the form of a plate, while the stamps are connected to the frame and the loading device, and a dynamometer is placed between the frame and

stamp in the form of a plate.

i

The device is illustrated in the drawing, which shows a general view.

Yo

XI 00 4X O

With

3178

The device comprises a base 1, vertical posts 2 mounted on it, which are guide rails of four rollers 3, providing vertical movement of the frame

4.

On the base there is a vessel 5 for placing a sample, a stage 6 and an additional vessel 7 for placing a sample placed on it.

On the racks are placed a clamp 8 of the zero position of the frame and a resistance indicator 9 in the form of a continuous induction winding of a wire of small diameter. A fixed index-slider 10 of the resistance indicator is fixed on the frame. The readings of the change in resistance of the material are recorded on an oscilloscope.

The dies 11 and 12 have vertical rods 13 and 1, which are fastened to the vertical frame with locknuts 14 and 15.

A load 16 is placed on the rod 13. A theisometric dynamometer 17. The readings of which are transmitted to the oscilloscope, is mounted on the I. rod. Nos. 17 and 18 show the test samples.

The device operates as follows.

Samples of the test material 18 and 17 are placed in the vessels 5 and 7, using the clamp 8 of the frame zero position k, the lower surface of the dies is set according to the level of the test mass. A predetermined load is installed on the sample bar 17, the frame zero position lock is removed, and the dies are evenly buried with a continuously running oscillograph. For any depth, within the limits of the experiment, there is a pressure on the dynamometer on one of the dies. The pressure on the other dies (upper) is defined as the difference of the specified load, taking into account the mass of the frame, rods and dies and pressure on

lower I stamp N ..

Ht G - Nb where G is the mass of the cargo, kg;

 -4

N. - pressure on the stamp plate; The average pressure on the walls of the stamp is determined by the formula:

0

B, -n b

26 bh.

where N, is the pressure on the stamp plate, n;

A. - the horizontal size of the side of the plate, m; h.- depth of penetration of dies,

m „

The average pressure on the bottom of the die (prism) is determined by the formula:

"-F

where N is the pressure on the volumetric stamp,

N

And - the area of the bottom of the die, m2.

By the ratio of the values of the resistance of the wall and the bottom of the dies, it is possible to make a prediction about the final qualities of the test material after time, by differentiating the resistance to penetration of parts of dies of various shapes.

Claims (1)

The claims A device for determining the penetration characteristics of materials, comprising a base, a stage mounted on the base, racks, a frame placed on them, a stamp, a container for placing a sample, load and measuring devices, characterized in that, in order to increase the accuracy of determining the penetration character The device is equipped with a dynamometer, additional sample container and stamp, one of the stamps is made in the form of a prism, the other in the form of a plate, and the stamps are connected to the frame and load nym device and the load cell is disposed between the frame and a stamp plate. AND. L Yu //////////////////////////// // V // W // U (/ # V Editor Compiled by M. Slinko Tehred M. Morgenthal Order L $ 62 Circulation VNIIIPI of the State Council for inventions and discoveries under the State Committee for Science and Technology of the USSR 113035, Moscow, Zh-35, Rauska nab., 4/5  f6, 13 r ° b X  / ty / tr Proofreader S. Patrusheva Subscription