發(fā)布時(shí)間：2018-06-27 09:00

  本文選題：夾層結(jié)構(gòu) + 雙懸臂梁�。� 參考：《南京工業(yè)大學(xué)學(xué)報(bào)(自然科學(xué)版)》2017年01期

【摘要】：以玻璃纖維增加塑料(GFRP)-泡沫夾層結(jié)構(gòu)為研究對象,在不同溫度條件下,采用拉伸試驗(yàn)確定聚氨酯泡沫芯材料的拉伸性能;經(jīng)差示掃描量熱分析法(DSC)測試GFRP樹脂的玻璃化轉(zhuǎn)變溫度;通過雙懸臂梁(DCB)試驗(yàn)研究,測試不同溫度(30、50、70和90℃)條件下,夾層結(jié)構(gòu)的I型裂紋擴(kuò)展形態(tài)和界面應(yīng)變能釋放率,分析溫度對GFRP-泡沫夾層結(jié)構(gòu)界面數(shù)性能的影響。結(jié)果發(fā)現(xiàn):GFRP樹脂的玻璃化溫度為90℃;溫度對聚氨酯泡沫的拉伸強(qiáng)度和拉伸模量影響較小;隨著溫度的升高,GFRP-泡沫夾層結(jié)構(gòu)的荷載呈下降趨勢,界面應(yīng)變能釋放率的峰值越來越大。運(yùn)用能量釋放率斷裂準(zhǔn)則判別裂紋擴(kuò)展符合理論要求。
[Abstract]:The tensile properties of polyurethane foam core materials were determined by tensile test under different temperature, taking glass fiber reinforced plastics (GFRP)-foam sandwich structure as the research object. The glass transition temperature of GFRP resin was measured by differential scanning calorimetry (DSC), and the mode I crack growth morphology and interfacial strain energy release rate of sandwich structure were measured by double cantilever beam (DCB) test at different temperatures (30 鈩，

本文編號：2073385