Method for constructing geometric topology structure of peripheral interface transition area of concrete heterogeneous anisotropy aggregate

An interface transition zone and anisotropic technology, applied in image data processing, 3D modeling, instruments, etc., can solve problems such as unreliable numerical simulation results and consistent particle shape

Active Publication Date: 2015-06-10
HOHAI UNIV
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Problems solved by technology

However, the aggregate particles in concrete are not composed of perfect spherical particles. They may be replaced by particles with complex geometric shapes such as certain edges, faces, and angles. For such complex geometric particles, the use of inscribed spherical radius The augmented recognition method cannot really construct the interface topology structure of equal th

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  • Method for constructing geometric topology structure of peripheral interface transition area of concrete heterogeneous anisotropy aggregate
  • Method for constructing geometric topology structure of peripheral interface transition area of concrete heterogeneous anisotropy aggregate
  • Method for constructing geometric topology structure of peripheral interface transition area of concrete heterogeneous anisotropy aggregate

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Embodiment 1

[0079] Figure 6 Schematic diagram showing the geometric topology of an icosahedral aggregate geometry that achieves an equal-thickness interface around its surface. Firstly, the icosahedral aggregate is divided into 20 tetrahedral units using commercial software (such as ANSYS, ABAQUS, etc.), and then according to the specific implementation steps introduced above, the Minkowsky summation mechanism is geometrically realized to construct its surface surroundings, etc. The geometric topology of the thickness interface, that is, the icosahedral aggregate as the basic unit body, Figure 6 The sphere shown is an extended unit body, the radius of the sphere is set as the interface thickness, and the center of the sphere is located on the surface of the basic unit body. According to formula (1), the Minkowsky summation mechanism of the basic unit body and the extended unit body is geometrically expressed as Figure 6 The trajectory of the extended sphere rolling around the surface ...

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Abstract

The invention discloses a method for constructing a geometric topology structure of a peripheral interface transition area of concrete heterogeneous anisotropy aggregate. The method includes the following steps of firstly, determining the geometric shape of aggregate particles, and dividing the aggregate particles through tetrahedron units to obtain information of vortexes of each tetrahedron unit; secondly, geometrically obtaining an interface topology area corresponding to each vertex of the composition particles; thirdly, geometrically obtaining an interface topology area corresponding to each edge of the composition particles; fourthly, geometrically obtaining an interface topology area corresponding to each triangular facet of the composition particles. On the basis of computer graphics, the uniform-thickness interface topology structure on the periphery of the complex-form aggregate particles under the Minkowsky summation mechanism is geometrically obtained. The method has the advantages of being simple in theory, convenient to operate, low in hardware requirement and the like.

Description

technical field [0001] The invention relates to a method for constructing the geometric topological structure of the interface transition zone around concrete heterogeneous anisotropic aggregates, and belongs to the technical field of concrete microscopic numerical test pretreatment. Background technique [0002] Due to the constraints of the hardened aggregate surface during the accumulation of cement particles, a relatively high-porosity area with a certain thickness is usually formed around the hardened aggregate surface. This area is the interface transition zone, and a large number of experiments and numerical observations have confirmed that The structural characteristics of the interfacial transition zone play a crucial role in the mechanical and transport properties of concrete. However, the interfacial transition zone around aggregates under high concentration conditions is actually a complex network structure, which makes it impossible to directly measure the struc...

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Application Information

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IPC IPC(8): G06T17/00
Inventor 许文祥王涵牛彦哲钱剑王晗栋徐文凯
Owner HOHAI UNIV
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