高韌性PVA-FRCC單軸受壓力學性能及本構關系
發(fā)布時間：2019-01-26 17:48
【摘要】：通過單軸受壓強度和變形特性試驗,研究了聚乙烯醇(PVA)纖維體積摻量、粉煤灰及硅灰摻量對高韌性PVA纖維增強水泥基復合材料(PVA-FRCC)受壓性能的影響;依據(jù)測得的抗壓強度、彈性模量、泊松比以及單軸受壓應力-應變全曲線,分別建立了立方體抗壓強度與軸心抗壓強度以及彈性模量的關系式;利用掃描電鏡技術,對高韌性PVA-FRCC的微觀結構進行了初步研究;基于實測應力-應變曲線的特點,提出了單軸受壓本構方程,為高韌性PVA-FRCC結構非線性有限元分析及結構設計提供了理論依據(jù).
[Abstract]:Through uniaxial compression strength and deformation test, the effects of volume content of PVA (PVA) fiber, fly ash and silica fume on compressive properties of high toughness PVA fiber reinforced cement matrix composite (PVA-FRCC) were studied. According to the measured compressive strength, elastic modulus, Poisson's ratio and the full stress-strain curve of uniaxial compression, the relationship between cube compressive strength and axial compressive strength and elastic modulus is established respectively. The microstructure of high toughness PVA-FRCC was studied by scanning electron microscopy (SEM). Based on the characteristics of measured stress-strain curves, a uniaxial compression constitutive equation is proposed, which provides a theoretical basis for nonlinear finite element analysis and structural design of high-toughness PVA-FRCC structures.
【作者單位】： 河南理工大學土木工程學院;
【基金】：國家自然科學基金資助項目(51208183) 河南省科技攻關項目(132102310312) 河南省自然科學研究計劃項目(12B560006) 河南理工大學博士基金資助項目(B2012-032)
【分類號】：TU528.041
，
本文編號：2415743
[Abstract]:Through uniaxial compression strength and deformation test, the effects of volume content of PVA (PVA) fiber, fly ash and silica fume on compressive properties of high toughness PVA fiber reinforced cement matrix composite (PVA-FRCC) were studied. According to the measured compressive strength, elastic modulus, Poisson's ratio and the full stress-strain curve of uniaxial compression, the relationship between cube compressive strength and axial compressive strength and elastic modulus is established respectively. The microstructure of high toughness PVA-FRCC was studied by scanning electron microscopy (SEM). Based on the characteristics of measured stress-strain curves, a uniaxial compression constitutive equation is proposed, which provides a theoretical basis for nonlinear finite element analysis and structural design of high-toughness PVA-FRCC structures.
【作者單位】： 河南理工大學土木工程學院;
【基金】：國家自然科學基金資助項目(51208183) 河南省科技攻關項目(132102310312) 河南省自然科學研究計劃項目(12B560006) 河南理工大學博士基金資助項目(B2012-032)
【分類號】：TU528.041
，
本文編號：2415743
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