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Method for in-situ estimation of tensile deformation of rubber hyperelastic material based on spherical indentation method

A technology of tensile deformation and indentation method, which is applied in the field of material analysis and testing, and can solve problems such as fatigue

Active Publication Date: 2020-02-25
CHONGQING JIAOTONG UNIVERSITY
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Problems solved by technology

At present, the application of indentation method is mainly focused on measuring the mechanical properties of isotropic materials, such as hardness, strength, etc., but it seems a little weak for more complex materials or structures, such as multi-layer materials, composite materials, isotropic materials, etc. Heterogeneous materials, etc.

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  • Method for in-situ estimation of tensile deformation of rubber hyperelastic material based on spherical indentation method
  • Method for in-situ estimation of tensile deformation of rubber hyperelastic material based on spherical indentation method
  • Method for in-situ estimation of tensile deformation of rubber hyperelastic material based on spherical indentation method

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Embodiment Construction

[0114] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic concept of the present invention, and the following embodiments and the features in the embodiments can be combined with each other in the case of no conflict.

[0115] Wherein, the accompanying drawings are for illustrative purposes only, and represent only schematic diagrams, rather than physical drawings, and should...

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Abstract

The invention relates to a method for the in-situ estimation of the tensile deformation of a rubber hyperelastic material based on a spherical indentation method and belongs to the technical field ofmaterial analysis and testing. The feasibility of practical application mainly depends on the nonlinear mechanical properties of the type of material. After the material is deformed, a contact area formed by spherical indentation is an ellipse, and the eccentricity of the ellipse is changed along with the change of a deformation state. In addition, since the material is stretched and hardened, theindentation modulus can be increased along with continuous stretching. Therefore, the deformation state of the material can be estimated according to the contact area eccentricity and the indentationmodulus measured by a spherical indentation experiment. The method is used for estimating the tensile deformation of the rubber hyperelastic material and is expansion and attempt of the indentation method in engineering practical application.

Description

technical field [0001] The invention belongs to the technical field of material analysis and testing, and in particular relates to a method for in-situ estimation of tensile deformation of rubber-like hyperelastic materials by means of a spherical indentation method. Background technique [0002] The indentation method is a simple and easy method to test the mechanical properties of materials, which belongs to the contact non-destructive testing method. According to the requirements of experimental conditions, the size of the indentation probe can be as small as micron or even nanometer, such as nanoindentation technology. This method calculates the mechanical properties of the material according to the load-displacement curve during the indentation process, and the experimental conditions are simple, so it is a widely used detection method at present. At present, the application of indentation method mainly focuses on measuring the mechanical properties of isotropic materi...

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Application Information

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IPC IPC(8): G01N3/42
CPCG01N3/42G01N2203/0078
Inventor 周磊王世斌王旭刘小会韦慧心
Owner CHONGQING JIAOTONG UNIVERSITY
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