Modelling of Deformation Behavior of Micro-Mezo-Macroscopic Scale of Glassy Polymers

玻璃态聚合物微观-介观-宏观尺度变形行为的建模

基本信息

  • 批准号:
    07555032
  • 负责人:
  • 金额:
    $ 5.7万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)
  • 财政年份:
    1995
  • 资助国家:
    日本
  • 起止时间:
    1995 至 1996
  • 项目状态:
    已结题

项目摘要

In the development of a constitutive model of deformation behavior for a glassy polymer, molecular chain network theories have been developed to take account of the strain-induced anisotropy due to the alignment of the molecular chains and the changes in the number of entangled points. However, the suitable constitutive equation which can duplicate the general deformation behavior of polymeric materials and relationship betweenn the micro-and macroscopic behaviors of polymeric materials, that have hierarchical structures at successive molecular to macrolevels, have not been clarified vet.In this work, a new molecular chain network model, nonaffine model, which allows the change in the number of entangled points due to the thermal activation caused by the temperature change and the pullout of the molecular chain from the entangled points by local deformation. An identification method employing both experiments and computational simulation has been developed and thus established constitu … More tive equation has been approved through the computational prediction of experimental results. Furthermore, the peculiar instability propagation behavior observed in the tensile deformation as well as in the shear deformation under different deformation conditions.Next, in order to estabish the hierarchical constitutive model covering the response of molecular structure of mononer leading to deformation on a mezzo-and macroscopic deformation behavior, we applied AFM and clarified the relationship between the micro-and macroscopic behaviors. For highly oriented ultrahigh molecular weight polyethylene, (UHMW-PE), hierarchical structures with scales from microns to angstroms were observed such as microfibril structure aligned along the drawing direction, and nanofibril structure with dozens of nanometers. On the molecular level, regular chain pattern is formed on the surface of the nanofibril structure. The observation of microscopic surface profiles of PC,a glassy polymer, under uniaxial tension with neck propagation has clarified that the formation of microfibril structures aligned along the tensile direction on the surface and the clear delay in the rotation of aligned microfibril structures with rsepect to that of principal direction of plastic stretch due to shear strain, which suggests the necessity of the establishment of the nonassociative frame work for the constitutive equation. Less
在建立玻璃态聚合物变形行为本构模型的过程中,发展了考虑分子链排列和纠缠点数目变化引起的应变诱导各向异性的分子链网络理论。然而,可以复制聚合物材料一般变形行为的合适的本构方程,以及具有连续的分子到宏观层次的分级结构的聚合物材料的微观和宏观行为之间的关系,还没有被阐明。在本工作中,一个新的分子链网络模型,非仿射模型,允许由于温度变化引起的热激活而改变纠缠点的数目,以及通过局部变形从缠结点上拔出分子链。提出了一种实验和计算机仿真相结合的辨识方法,从而建立了…系统通过对实验结果的计算预测,验证了更为合理的方程。此外,在拉伸变形和剪切变形中观察到了不同变形条件下特殊的失稳扩展行为。其次,为了建立涵盖单体分子结构在中宏观变形行为上的响应的分层本构模型,我们应用原子力显微镜,阐明了微观行为和宏观行为之间的关系。对于高度取向的超高相对分子质量聚乙烯(UHMW-PE),观察到了微米到埃的分级结构,如沿拉伸方向排列的微纤维结构和数十纳米的纳米纤维结构。在分子水平上,纳米纤维结构的表面形成了规则的链状图案。通过对玻璃化聚合物PC在单轴拉伸和颈展条件下的微观表面轮廓的观察,阐明了表面沿拉伸方向排列的微纤维结构的形成和由于剪切应变而与塑性拉伸主方向垂直的排列的微纤维结构旋转的明显延迟,这表明建立本构方程的非缔合框架是必要的。较少

项目成果

期刊论文数量(39)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
冨田佳宏,田中繁之: "からみ点変化を考慮した分子鎖網目理論によるガラス状ポリマーの構成式と変形挙動のシミュレーション" 日本機械学会論文集. 61A-581. 120-126 (1995)
Yoshihiro Tomita、Shigeyuki Tanaka:“考虑缠结点变化的玻璃状聚合物的变形行为的本构公式和模拟”,日本机械工程师学会汇刊 61A-581 (1995)。
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    0
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冨田佳宏,田中繁之: "からみ点変化を考慮した分子鎖綱目理論によるガラス状ポリマーの構成式と変形挙動のシミュレーション" 日本機械学会論文集. 61A-581. 120-126 (1995)
Yoshihiro Tomita、Shigeyuki Tanaka:“考虑缠结点变化,使用分子链网格理论模拟玻璃状聚合物的本构公式和变形行为”,日本机械工程师学会汇刊 61A-581 (1995)。
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    0
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加集陽介,冨田佳宏,安達泰治: "延伸を受けたポリマーのナノ構造のAFM観察" 日本機械学会平成8年度材料力学部門講演会論文集. 96-10B. 477-478 (1996)
Yosuke Kashu、Yoshihiro Tomita、Yasuharu Adachi:“拉伸聚合物纳米结构的 AFM 观察”日本机械工程师学会材料力学分部 1996 年会议记录 96-10B (1996)。
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    0
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冨田佳宏: "ガラス状ポリマーの分子鎖綱目理論による構成式と変形挙動のシミュレーション" Journal of the JSTP. 37-424. 485-491 (1996)
Yoshihiro Tomita:“利用分子链结构理论模拟玻璃状聚合物的本构式和变形行为”,JSTP 杂志 37-424(1996)。
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    0
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Yosuke KASHU,Taji ADACHI,and Yoshihiro TOMITA: "AFM Observation of Microscopic Surface configuration of Glassy Polymer under Macroscopic Deformation" Proceedings of 19th NCP Symposium. 93-94 (1995)
Yosuke KASHU、Taji ADACHI、Yoshihiro TOMITA:“AFM 观察宏观变形下玻璃状聚合物的微观表面构型”第 19 届 NCP 研讨会论文集。
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TOMITA Yoshihiro其他文献

TOMITA Yoshihiro的其他文献

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{{ truncateString('TOMITA Yoshihiro', 18)}}的其他基金

Strengthening and Functionalization of Polymer by Controlling the Morphology, Strength and Boundary Layer of Microscopic Filler
通过控制微观填料的形态、强度和边界层来增强和功能化聚合物
  • 批准号:
    22360054
  • 财政年份:
    2010
  • 资助金额:
    $ 5.7万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Construction of Seamless Model for Material Microstructural Evolution and Prediction of Material Characteristics
材料微观结构演化无缝模型的构建和材料特性的预测
  • 批准号:
    18360061
  • 财政年份:
    2006
  • 资助金额:
    $ 5.7万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Multiscale Model of Transformation Induced Plasticity and its Application to Morphogenesis with High Functional
相变诱导可塑性的多尺度模型及其在高功能形态发生中的应用
  • 批准号:
    14350059
  • 财政年份:
    2002
  • 资助金额:
    $ 5.7万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Clarification and Functionalization of Micro -and Mezzo structure near Boundary between Different Phase in Single-crystalline Super Metals
单晶超级金属异相边界附近微观和中层结构的澄清和功能化
  • 批准号:
    11450044
  • 财政年份:
    1999
  • 资助金额:
    $ 5.7万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B).
Modelling of Deformation Behavior of Mesoscopic Scale of Materials and Its Application to Design of Functional Materia
材料细观尺度变形行为建模及其在功能材料设计中的应用
  • 批准号:
    07455053
  • 财政年份:
    1995
  • 资助金额:
    $ 5.7万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Construction and Application of Wrinkling Limit Diagram (WLD)
起皱极限图(WLD)的构建及应用
  • 批准号:
    05555034
  • 财政年份:
    1993
  • 资助金额:
    $ 5.7万
  • 项目类别:
    Grant-in-Aid for Developmental Scientific Research (B)
Microscopic deformation mechanism and its application to the evaluation of macroscopic deformation behavior of fiber reinforced composite materials
微观变形机制及其在纤维增强复合材料宏观变形行为评价中的应用
  • 批准号:
    04452123
  • 财政年份:
    1992
  • 资助金额:
    $ 5.7万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (B)
Investigation and Prediction of Onset of Plastic Instabilities and Flow local izations under Dynamic Loading Condition
动态加载条件下塑性不稳定性和流动局部化发生的研究和预测
  • 批准号:
    62550075
  • 财政年份:
    1987
  • 资助金额:
    $ 5.7万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)

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解释随时间变化的岩石节理行为和本构方程的发展
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