本文選題：柔性注壓錨桿 + 材料非線性　； 參考：《青島科技大學(xué)》2015年碩士論文

【摘要】：柔性注壓錨桿是一種結(jié)構(gòu)新穎且錨固機(jī)理獨(dú)特的錨桿,但因?qū)ζ溴^固特性的研究還不夠深入,使得目前市場(chǎng)上對(duì)錨桿生產(chǎn)與使用不夠廣泛,本文主要研究柔性注壓錨桿的錨固特性,為柔性注壓錨桿的設(shè)計(jì)與制造提供理論依據(jù)。首先,了解構(gòu)成錨桿桿體的高分子材料的主要特性,對(duì)比幾種常用的非線性材料的本構(gòu)模型,了解各種本構(gòu)模型適用的材料,選擇最適合于柔性注壓錨桿體材料的本構(gòu)模型Mooney-Rivilin模型,對(duì)比幾種確定本構(gòu)模型參數(shù)的方法,最終確定本文要用的材料參數(shù)值。其次,建立柔性注壓錨桿錨固系統(tǒng)的二維有限元計(jì)算模型,采用單一變量法,分析錨固系統(tǒng)主要結(jié)構(gòu)參數(shù)對(duì)錨桿錨固系統(tǒng)最大當(dāng)量應(yīng)力和接觸應(yīng)力的影響規(guī)律,確定最適合錨桿進(jìn)行錨固作業(yè)的結(jié)構(gòu)參數(shù),進(jìn)而給出柔性注壓錨桿的最優(yōu)化結(jié)構(gòu)。與將錨桿體簡(jiǎn)化為線彈性材料計(jì)算所得結(jié)果做對(duì)比,為柔性注壓錨桿的設(shè)計(jì)制造及使用提供依據(jù)。最后,建立錨桿錨固段與圍巖體的錨固系統(tǒng)的三維有限元計(jì)算模型,通過(guò)二次加載的方式,模擬錨桿錨固段應(yīng)力分布規(guī)律,對(duì)比線彈性材料的模擬結(jié)果。研究錨固系統(tǒng)摩擦系數(shù)以及錨桿體材料對(duì)錨固段接觸應(yīng)力與最大阻抗摩擦應(yīng)力的影響。
[Abstract]:Flexible pressure-injection bolt is a kind of anchor rod with novel structure and unique anchoring mechanism. However, the research on its anchoring characteristics is not deep enough, which makes the production and application of anchor rod not widely used in the market at present. In this paper, the anchoring characteristics of flexible pressure-injection bolt are studied, which provides a theoretical basis for the design and manufacture of flexible pressure-injection anchor. First of all, we understand the main characteristics of the polymer materials that make up the bolt body, compare the constitutive models of several common nonlinear materials, and understand the materials applicable to the various constitutive models. The constitutive model Mooney-Rivilin model, which is the most suitable for flexible pressure-injection bolt material, is selected and compared with several methods to determine the parameters of the constitutive model. Finally, the value of the material parameters to be used in this paper is determined. Secondly, a two-dimensional finite element model of flexible pressure-injection anchoring system is established, and the influence of the main structural parameters of the anchoring system on the maximum equivalent stress and contact stress of the anchor system is analyzed by using a single variable method. The optimum structure of flexible pressure-injection bolt is given by determining the structure parameters that are most suitable for anchoring. Compared with the calculated results of simplifying the bolt body to linear elastic material, it provides the basis for the design, manufacture and application of flexible pressure-injection anchor. Finally, the three-dimensional finite element model of anchoring system of anchor rod and surrounding rock is established. The stress distribution of anchor bolt is simulated by secondary loading, and the simulation results of linear elastic material are compared. The influence of the friction coefficient of the anchoring system and the material of the anchor body on the contact stress and the maximum impedance friction stress of the anchoring section are studied.
【學(xué)位授予單位】：青島科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TD353.6;TQ317

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相關(guān)期刊論文 前2條

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2 李曉芳,楊曉翔;橡膠材料的超彈性本構(gòu)模型[J];彈性體;2005年01期

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本文編號(hào)：1794892