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A Prediction Method of Nonlinear Mechanical Behavior of Architectural Membranes

A technology of architectural membrane materials and prediction methods, which is applied in the directions of measuring devices, scientific instruments, analytical materials, etc., can solve the problems of oversimplification of the constitutive model of architectural membrane materials, and achieve the optimal relevant parameters. The effect of moderate specimen size

Active Publication Date: 2019-10-29
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above analysis, the present invention aims to provide a prediction method for the nonlinear mechanical behavior of architectural membrane materials, which solves the problem of oversimplification of the constitutive model of architectural membrane materials in the current specifications, and provides an effective reference for further accurate design and analysis of architectural structures

Method used

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  • A Prediction Method of Nonlinear Mechanical Behavior of Architectural Membranes
  • A Prediction Method of Nonlinear Mechanical Behavior of Architectural Membranes
  • A Prediction Method of Nonlinear Mechanical Behavior of Architectural Membranes

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Embodiment 1

[0052] This embodiment discloses a method for predicting the nonlinear mechanical behavior of architectural membrane materials, such as figure 1 shown, including the following steps:

[0053] Step S1, cutting the test piece for the test;

[0054] The test piece is an architectural membrane material, and the cutting result is a strip-shaped test piece;

[0055] Optionally, there can be multiple strip-shaped test pieces, and the fiber direction needs to be considered when cutting. The number of test pieces is determined according to the number of valid data required for the test; each test piece is equal in size;

[0056] Specifically, the cutting direction of the test piece in this embodiment includes the warp direction, the weft direction and the 45° direction of the fiber.

[0057]In order to facilitate the clamping of later tests, clamping lines are provided at the two ports along the length direction of each strip-shaped specimen, wherein the distance from the clamping li...

Embodiment 2

[0088] (1) Use the coated fabric membrane material, and cut the coated fabric membrane material into strip-shaped test pieces, such as Figure 4 As shown, the length of the strip-shaped test piece is 300mm, and the width is 50mm; the two ports of the strip-shaped test piece along the length direction are equipped with clamping lines, and the distance between the clamping lines and the ports is 50mm.

[0089] (2) Use the fixture to fix the strip-shaped specimen on the conventional material tensile testing machine based on the clamping line, and use the testing machine to perform a monotonic tensile test on the strip-shaped specimen. Tensile force is applied in the direction of the short side of the specimen, and the loading direction forms an angle θ with the fiber direction of the long strip specimen. Pull the 0° specimen at a tensile rate of 100mm / min until the specimen is completely destroyed, and record the variation of tensile force with displacement.

[0090] (3) The tes...

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Abstract

The invention relates to a method for predicating the nonlinear mechanical behaviors of an architectural membrane, and belongs to the technical field of mechanical behavior prediction. The method comprises the following steps: cutting a test piece for test; performing tensile test on the test piece, and recording test data; fitting the test data, and constructing a constitutive model; and predicting the nonlinear mechanical behaviors of the architectural membrane under different loading mechanisms by using the constitutive model. The method effectively solves a deficiency that existing constitutive models can not reflect the influences of loading history in describing the tensile mechanical behaviors of the architectural membrane; the adopted test piece has a moderate size, and can be easily cut, the test process is simple and has high operability, the calculation efficiency is high, the prediction result is similar to the test data, a defect of constitutive models of the architecturalmembrane in current specifications is effectively compensated, and an effective reference is provided for further accurate design analysis of the architectural membrane structure.

Description

technical field [0001] The invention relates to the technical field of mechanical behavior prediction, in particular to a prediction method for nonlinear mechanical behavior of architectural membrane materials. Background technique [0002] As a kind of flexible braided composite material, the mechanical properties of architectural membrane materials are affected by the coupling of multiple factors such as mesostructure, component material properties and interface properties of different component materials, and have typical nonlinear, inelastic and viscoelastic properties. The mechanical properties are significantly affected by the loading history and loading environment. Due to the wide variety of architectural membrane materials and the significant differences in the manufacturing processes of different manufacturers, this leads to differences in the mechanical properties of different architectural membrane materials. [0003] The constitutive model of architectural memb...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/08
CPCG01N3/08G01N2203/0676
Inventor 张营营徐俊豪张兰兰周祎丁威郭震
Owner CHINA UNIV OF MINING & TECH