Experimental device for measuring mechanical parameter of viscous-elastic material by using shearing method

Abstract

The invention provides an experimental device for measuring mechanical parameters of a viscous-elastic material by using a shearing method. The experimental device comprises a shell, a force sensor, an acceleration sensor and a vibration exciter. The vibration exciter is arranged in a lower shell. A pre-tightening screw is installed on an upper shell. The pre-tightening screw can drive a positioning sliding block, the force sensor and a T-shaped gasket to move up and down. The T-shaped gasket and a tray are used for clamping a test piece. The tray is in thread fit with a U-shaped support. The U-shaped support is connected with an acceleration sensor packaging cover plate. The acceleration sensor is placed in an acceleration sensor packaging lower shell. The acceleration sensor packaging lower shell is fixedly connected with the vibration exciter. By using the shearing method as a principle, compared with the existing device, the experimental device has the advantages of simple structure, high testing accuracy, wide measured frequency band and the like. A test piece clamping part has good test piece adaptability and can accurately and reliably clamp test pieces with different specifications and test pieces made of different materials. Since the T-shaped gasket and the tray are provided with positioning grooves, the realization of accurate installation of the test piece is facilitated and the system accuracy is guaranteed.

Description

technical field [0001] The invention relates to the technical field of testing parameters of viscoelastic materials, in particular to an experimental device for measuring mechanical parameters of viscoelastic materials using a shearing method. Background technique [0002] At present, the measurement equipment for the mechanical parameters of viscoelastic damping materials currently used by relevant domestic units mainly includes the Metravib viscoelastic analyzer imported from France and the B&K3550 complex modulus test system imported from Denmark. These two kinds of systems have defects such as high price and complex usage methods. Among them, the Metravib viscoelastic analyzer is designed based on the principle of temperature-frequency equivalent, which is an indirect measurement method, and the upper limit of the measurement frequency is generally lower than 500Hz; The mechanical parameters of the damping material are obtained, but it is difficult for the system to obt...

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Problems solved by technology

These two systems have defects such as high prices and complicated methods of use.

Among them, the Metravib viscoelastic analyzer is designed based on the principle of temperature-frequency equivalent, which is an indirect measurement method, and the upper limit of the measurement frequency is generally lower than 500Hz; The mechanical parameters of the damping material are obtained, but it is difficult for the system to obtain the high-order (third and fourth-order) resonance peaks of the specimen during the actual measurement process, and the upper limit of the measurement frequency is lower than 1kHz

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