本文選題：γ輻照 + GFRP��； 參考：《復(fù)合材料學(xué)報(bào)》2017年10期

【摘要】：玻璃纖維增強(qiáng)樹脂基復(fù)合材料(Glass Fiber Reinforced Plastic,GFRP)由于其良好的電絕緣性和力學(xué)性能,被作為北京正負(fù)電子對(duì)撞機(jī)束流管支撐法蘭的制作材料。北京電子對(duì)撞機(jī)運(yùn)行時(shí),將對(duì)束流管及其支撐法蘭產(chǎn)生大量γ和中子輻射。研究發(fā)現(xiàn),玻璃纖維增強(qiáng)環(huán)氧樹脂基復(fù)合材料長(zhǎng)期處于γ輻射環(huán)境中,其力學(xué)性能會(huì)發(fā)生變遷。本文對(duì)由20kGy、100kGy、200kGy劑量γ輻照前后的GFRP試件進(jìn)行拉-拉疲勞實(shí)驗(yàn)研究,發(fā)現(xiàn)γ輻照對(duì)低周疲勞階段的疲勞壽命影響較為明顯,而對(duì)于高周疲勞階段疲勞壽命影響不大�；贖wang和Han提出的假設(shè),建立了拉-拉疲勞雙參數(shù)疲勞壽命模型,并驗(yàn)證該疲勞壽命模型的準(zhǔn)確性。利用掃描電鏡對(duì)試件進(jìn)行觀察,發(fā)現(xiàn)輻照后環(huán)氧樹脂基體出現(xiàn)碎片,環(huán)氧樹脂與增強(qiáng)玻璃纖維的黏結(jié)界面受到破壞,但輻照對(duì)玻璃纖維影響程度較小。紅外光譜圖顯示環(huán)氧樹脂在輻照過程中降解反應(yīng)較交聯(lián)反應(yīng)占優(yōu)勢(shì)。
[Abstract]:Glass Fiber Reinforced Plastics GFRP (glass reinforced resin matrix composite) has been used as the fabrication material for beam pipe support flange of Beijing positron and negative electron collider due to its good electrical insulation and mechanical properties. During the operation of the Beijing Electron Collider, a large amount of 緯 and neutron radiation will be produced on the beam tube and its supporting flange. It was found that the mechanical properties of glass fiber reinforced epoxy matrix composites changed when they were exposed to 緯-radiation for a long time. In this paper, tensile fatigue tests of GFRP specimens before and after 200kGy irradiation with a dose of 20 kGy of 100kGy or 100kGy have been carried out. It is found that 緯 irradiation has a more obvious effect on fatigue life at low cycle fatigue stage than on high cycle fatigue stage. Based on the assumptions proposed by Hwang and Han, a two-parameter fatigue life model of tensile fatigue is established, and the accuracy of the model is verified. Scanning electron microscope (SEM) was used to observe the samples. It was found that there were fragments in epoxy resin matrix after irradiation, and the bonding interface between epoxy resin and reinforced glass fiber was destroyed, but irradiation had little effect on glass fiber. Infrared spectra showed that the degradation reaction of epoxy resin was superior to that of crosslinking reaction during irradiation.
【作者單位】： 北京科技大學(xué)機(jī)械工程學(xué)院;北京科技大學(xué)材料科學(xué)與工程學(xué)院;
【基金】：國(guó)家自然科學(xué)青年基金(51605025)
【分類號(hào)】：TB332;TQ327.1

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