Biaxial extension test device

A biaxial stretching and testing device technology, which is applied in the direction of applying stable tension/pressure to test the strength of materials, can solve the problems of large friction force of the traveling mechanism, large initial pretension force, laborious operation, etc., to ensure the overall The effect of strength, compactness and simplicity of form

Active Publication Date: 2015-04-29
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

However, the cross-shaped frame of the tensile test device is complex, large in size, and inconvenient to assemble. It is difficult to control the force of the specimen clamped by the fixture, and the operation is laborious. The friction force of the traveling mechanism is large, and the initial pretension force is large, which affects the initial test accuracy. The separation of hydraulic servo valve and hydraulic cylinder affects the dynamic response characteristics and control accura

Method used

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Embodiment Construction

[0039] Such as Figure 1~3 As shown, a preferred embodiment of the present invention provides a biaxial tensile testing device, the structure of which includes a horizontal platform frame 14, a servo cylinder 1, a tension sensor 4, a combination fixture, and a linear guide rail 10. Wherein, the combination fixture includes a fixture bracket 7 and a fixture 8 . The horizontal platform frame 14 is an orthogonal cross, and the ends of the four arms of the horizontal platform frame are all equipped with servo cylinders 1, and the servo cylinders 1 are connected to the horizontal platform frame 14 by bolts. Each servo cylinder 1 is connected to the tension sensor 4, clamp bracket 7, and clamp 8 in turn. Specifically, the piston of the servo cylinder 1 is connected to the tension sensor 4 through the first conversion part 3, and the tension sensor 4 is connected to the second conversion part. 5 is connected to the third transition piece 6, the third transition piece 6 is connected ...

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Abstract

The invention discloses a biaxial extension test device. The biaxial extension test device comprises a horizontal rack which is an orthogonal cross, wherein a servo-cylinder is mounted at the end part of each of four arms of the horizontal rack and sequentially connected with a tension sensor and a combined fixture; a linear guide rail is arranged on the surface of each of the four arms of the horizontal rack; and the combined clamps are arranged on the linear guide rails, can move along the linear guide rails and are used for clamping test pieces. The invention also provides a method for the biaxial extension test device to perform biaxial extension test, and the method comprises a plurality of steps. The biaxial extension test device is compact in structure, concise in format, stable in operation and high in precision, has various test functions (unidirectional static extension, low-cycle reciprocating extension, bidirectional static tensile strength and optional biaxial stress ratio low-cycle reciprocating extension), and can be applied to uniaxial tensile test machines, biaxial tensile test machines and the like.

Description

technical field [0001] The invention relates to a tensile testing device, in particular to a biaxial tensile testing device, which can be applied to biaxial monotonous stretching and low cycle cycle, tearing, and creep of architectural membranes, airship skins, and industrial fabrics test etc. It belongs to the field of material mechanics experiment technology and building structure material test technology. Background technique [0002] Polymer composite fabric film materials are lightweight, high-strength, chemical-resistant, and durable, and are used in modern architectural structures, aviation, aerospace and other industrial fields, such as architectural membrane structures, aviation airships, aerospace parachutes or soft landing systems. The fabric film is generally composed of a base cloth and a coating. The base cloth is made of polymer materials and synthetic fibers, and then woven into cloth. In the field of construction, there are mainly polyester fibers, glass fi...

Claims

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Application Information

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IPC IPC(8): G01N3/10
Inventor 陈务军高成军施光林
Owner SHANGHAI JIAO TONG UNIV
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