INTERFACE-MESOMECHANICS OF FIBER-REINFORCED COMPOSITES

纤维增强复合材料的界面细观力学

• 批准号: 06452320
• 负责人: OCHIAI Shojiro
• 金额: $ 4.74万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06452320/
• 关键词: Fiber-reinforced composite; Interface; Mesomechanics; Mesoscopic events; Crack; Fracture; メゾカニクス; 複合材料; 強度; 計算機シミュレーション; モデリング; コーティング; シミュレーション; 微細組織

In order to explore the mesomechanics, which can estimate the relation of mesostructure and mechanical events such as pull-out of fibers, bridging of fibers, interfacial debonding, crack formation and so on, and also can estimate the relation of the events above, occuring at various locations with stataitical scatter, to overall properties of composites, modelling, simulation and experimental study were carried out. In the present study, many good results were obatined about the following subjects.(1) Mechanism of the mode I crack formation due to a fracture of the interfacial layr and its propagation into fiber.(2) Mechanism of reduction of energy release rate due to interfacial debonding.(3) Modeling of accumulation of the mesoscopic mechanical events.(4) Modellin and simulation of interface-related mechanical interactions among the mesoscopic events and its relation to overall properties.(5) Development of a Monte Carlo simulation method to describe the interfacial behavior and its influence on strength and fracture toughness of composites.

为了探索细观力学，即能够估计细观结构与纤维拔出、纤维桥接、界面脱粘、裂纹形成等力学事件之间的关系，以及能够估计上述事件发生在不同位置并具有统计离散性的事件与复合材料整体性能之间的关系，本文进行了建模、仿真和实验研究。在本研究中，在以下几个方面取得了良好的结果。(1)界面层断裂导致的I型裂纹形成机理及其向纤维中的扩展。(2)界面脱粘导致能量释放率降低的机理。(3)介观力学事件累积的模拟。(4)介观事件间与界面相关的力学相互作用及其与整体性质的关系的建模与仿真。(5)发展了一种描述界面行为及其对复合材料强度和断裂韧性影响的Monte Carlo模拟方法。

项目成果

S.Ochiai: "Application of Monte Carlo Simulation Methods to Tensile Behavior of FRM" Journal of Science and Engineering of Composite Materials. (in press).

S.Ochiai：“蒙特卡罗模拟方法在 FRM 拉伸行为中的应用”复合材料科学与工程杂志。

Shojiro Ochiai: "Nb_3Sn tensile strength and its distribution estimated from change in superconducting critical current of preloaded multifilamentary composite wire" Cryogenics. No. 5 Vol. 35. 55-60 (1995)

Shojiro Ochiai：“根据预加载多丝复合线的超导临界电流的变化估算 Nb_3Sn 拉伸强度及其分布”Cryogenics。

S. Ochiai: "Application of Monte Carlo Simulation Method to Tensile Behavior of FRM" Journal of Science and Engineering of Composite Materials. (印刷中).

S. Ochiai：“蒙特卡罗模拟方法在 FRM 拉伸行为中的应用”复合材料科学与工程杂志（正在出版）。

Shojiro Ochiai: "Multiple cracking of a coating layer and its influence on fibre strength Part 1 Calculation of the energy release of the fiber at cracks for non-uniform crack spacing" Journal of Materials Science. Vol. 30. 274-279 (1995)

Shojiro Ochiai：“涂层的多重裂纹及其对纤维强度的影响，第 1 部分：非均匀裂纹间距裂纹处纤维能量释放的计算”材料科学杂志。

Shojiro Ochiai: "Multiple cracking of a coating layer and its influence on fibre strength Part 2 Monte Carlo simulation" Journal of Materials Science. Vol. 30. 509-513 (1995)

Shojiro Ochiai：“涂层的多重裂纹及其对纤维强度的影响，第 2 部分蒙特卡罗模拟”《材料科学杂志》。