本文選題：夾層結(jié)構(gòu) + 雙懸臂梁�。� 參考：《南京工業(yè)大學學報(自然科學版)》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。運用能量釋放率斷裂準則判別裂紋擴展符合理論要求。
[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，

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