本文選題：PE + 應(yīng)變率��； 參考：《新型建筑材料》2017年10期

【摘要】：管道用聚乙烯(PE)材料除承受靜荷載外,還會承受動(dòng)態(tài)荷載和不同溫度的作用,因此研究聚乙烯材料在靜、動(dòng)態(tài)荷載及不同溫度下的力學(xué)性能是有必要的。對PE管道材料進(jìn)行不同溫度和不同應(yīng)變率的壓縮實(shí)驗(yàn)研究,獲得PE在-70～120℃和10~(-4)～10~3 s~(-1)范圍內(nèi)應(yīng)力-應(yīng)變曲線,分析應(yīng)變率和溫度對PE屈服應(yīng)力的影響規(guī)律。結(jié)果表明:屈服應(yīng)力隨溫度降低和應(yīng)變率增大而增大;在-70～120℃和低應(yīng)變率條件下,屈服應(yīng)力與溫度關(guān)系可以用帶指數(shù)函數(shù)多項(xiàng)式進(jìn)行描述;在室溫條件和應(yīng)變率為10~(-4)～10~3 s~(-1)范圍內(nèi),屈服應(yīng)力隨應(yīng)變率的關(guān)系較為復(fù)雜。
[Abstract]:Polyethylene (PE) materials used in pipelines are subjected to dynamic loads and different temperatures in addition to static loads, so it is necessary to study the mechanical properties of PE materials under static and dynamic loads and at different temperatures. The compression experiments of PE pipeline materials at different temperatures and different strain rates were carried out. The stress-strain curves of PE were obtained in the range of -70 鈩，

本文編號：2080627