Brittle material test piece moulds and matching tensile test cramping apparatus thereof

Abstract

The invention relates to a brittle material sample die and a matched tension test fixture and includes a die and a fixture. A conveyer chain is arranged between the die and the fixture. The die includes a side surface plate, an end surface plate and a bottom plate. The side surface plate and the end surface plate are connected by a connecting element. The bottom plate is provided with a waterproof groove. The side surface plate and the end surface plate are connected with the bottom plate through the waterproof groove. The fixture includes a collet which is provided with a collecting spherical hinge. The collet consists of two parts and the two parts are connected through a connecting element. When the die is mounted, after each part is connected, a brittle material can be poured in the die to manufacture a bone-shaped sample. The enlarging end and the uniform section of the bone-shaped sample are transferred by a smooth curved surface. When the sample is stretched, a collet bolt is screwed out firstly and the bolt is screwed tightly after the sample is arranged in the collet. A tension test can be carried through after the connecting spherical hinge and the tension collet of a tension tester are connected. The invention has the advantages of simple structure, convenient dismounting, low cost, good manufacture effect, large holding area and excellent cooperation with the sample shape, etc.

Description

technical field [0001] The invention relates to a mold for a laboratory and its matching fixture, in particular to a brittle material test piece mold and its matching tensile test fixture. Background technique [0002] Although engineering rock mass in nature is mostly in a state of compressive stress, due to factors such as excavation, some rock mass is in a state of tensile stress, and this part of the rock mass has a crucial impact on the stability of the entire rock mass engineering. At present, the mold structures for manufacturing brittle material test pieces are relatively complicated, inconvenient to use, poor in effect, and high in manufacturing cost. The study of rock mechanical properties under tension has very important theoretical and engineering significance. Due to the difficulty in realizing the axial tension test, the indirect test method of the split test is mainly used to study the mechanical properties of rock under tension at present, but the axial tens...

AI Technical Summary

Problems solved by technology

It is more complicated to make the test piece with the method of embedded puller, and the position of the embedded puller must be strictly controlled in the process of making the test piece

The stick-type shaft pulling method needs to use high-strength binder, so affected by the strength of the binder and the setting time, the strength of the specimen itself should not be too large, the material of the specimen is limited, and the test time is long, but this type of The method has no special requirements on the shape and production of the test piece

The external clamping shaft pulling method is a simple test method, but the two ends of the test piece need to be enlarged, and there is no special fixture for it at present.

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