本文選題：纖維復(fù)合材料 + 有限元法　； 參考：《復(fù)合材料學(xué)報(bào)》2016年10期

【摘要】：為探明雙穩(wěn)態(tài)復(fù)合材料層合結(jié)構(gòu)在復(fù)雜環(huán)境條件下的應(yīng)用,對(duì)雙穩(wěn)態(tài)復(fù)合材料層合結(jié)構(gòu)的黏彈性行為進(jìn)行了研究。首先,將纖維簡(jiǎn)化為彈性材料,考慮基底材料的黏彈性行為。然后,根據(jù)纖維和基底的材料屬性,通過理論分析得到了雙穩(wěn)態(tài)復(fù)合材料層合結(jié)構(gòu)的黏彈性材料屬性;根據(jù)經(jīng)典層合板理論、最小應(yīng)變能原理和Maxwell黏彈性模型建立了雙穩(wěn)態(tài)復(fù)合材料層合結(jié)構(gòu)的黏彈性模型,通過理論分析得到其第二穩(wěn)態(tài)主曲率與扭曲率隨加載時(shí)間和溫度的變化關(guān)系。同時(shí),利用有限元軟件ABAQUS及其子程序UMAT建立了相應(yīng)的有限元模型,研究了加載時(shí)間和溫度對(duì)層合結(jié)構(gòu)第二穩(wěn)態(tài)性能的影響。理論與模擬結(jié)果均表明:層合結(jié)構(gòu)第二穩(wěn)態(tài)主曲率隨加載時(shí)間的延長(zhǎng)和溫度的升高而增大;扭曲率隨加載時(shí)間的延長(zhǎng)而減小,一般情況下隨溫度的升高而增大,但在加載時(shí)間較長(zhǎng)且溫度較高時(shí),可能會(huì)出現(xiàn)扭曲率隨溫度升高而減小的情況。理論計(jì)算結(jié)果與有限元模擬結(jié)果的比較顯示兩者吻合較好,可以通過有限元模擬對(duì)雙穩(wěn)態(tài)復(fù)合材料層合結(jié)構(gòu)的黏彈性行為進(jìn)行研究。
[Abstract]:In order to investigate the application of bistable composite laminated structure in complex environment, the viscoelastic behavior of bistable composite laminated structure was studied. Firstly, the fiber is simplified as an elastic material, and the viscoelastic behavior of the substrate is considered. Then, according to the material properties of fiber and substrate, the viscoelastic properties of bistable composite laminates are obtained by theoretical analysis. The minimum strain energy principle and Maxwell viscoelastic model are used to establish the viscoelastic model of bistable composite laminated structure. The relationship between the second steady state principal curvature and distortion rate with loading time and temperature is obtained by theoretical analysis. At the same time, the finite element model is established by using the finite element software Abaqus and its subprogram UMAT, and the influence of loading time and temperature on the second steady-state performance of laminated structure is studied. The theoretical and simulation results show that the second steady-state principal curvature of laminated structures increases with the increase of loading time and temperature, and the distortion rate decreases with the increase of loading time, and generally increases with the increase of temperature. However, when the loading time is longer and the temperature is higher, the distortion rate may decrease with the increase of temperature. The theoretical results are in good agreement with the finite element simulation results. The viscoelastic behavior of bistable composite laminated structures can be studied by finite element simulation.
【作者單位】： 浙江工業(yè)大學(xué)特種裝備制造與先進(jìn)加工技術(shù)教育部/浙江省重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金(51675485) 浙江省自然科學(xué)基金(LY15E050016) 高等學(xué)校博士學(xué)科點(diǎn)專項(xiàng)科研基金(20123317120003)
【分類號(hào)】：TB33

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