Analysis of Mechanical Behavior of Interface and Its Neighborhood in Composite from Multiple Fracture Phenomenon

从多重断裂现象分析复合材料界面及其邻近区域的力学行为

• 批准号: 04650649
• 负责人: OCHIAI Shojiro
• 金额: $ 1.41万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04650649/
• 关键词: Multiple fracture; Composite material; Interface; Stress transfer; Shear lag analysis; Monte Carlo Simulation; Fiber; Mesomechanics; シェアラグアナソシス; 強さ; クラック; エネルギー解放率; 破壊

Experiment, analysis and Monte Carlo simulation on multiple fracture phenomenon in composite materials were carried out to clarify the interfacial mechanical behavior of composite materials. Main results are summarized as follows.The multiple fracture phenomenon of the 90ﾟ ply in the 0/90/0 type cross-plied graphite/epoxy laminate composite is caused by the stress-transfer to the 90ﾟ ply through interface. Analysis of stress distribution and application of the computer-aided Monte Carlo simulation revealed that resin-rich layr with approximately 15 micronmeter in thickness at interface between plies plays a role to transfer stress.From the analysis of the multiple fracture of superconducting Y-Ba-Cu-O and Bi(Pb)-Sr-Ca-Cu-O oxides in silver-sheathed composite wire, it was shown that the interfacial shear strength in these composite was 30-40 MPa. This is the first finding in this field.From a numerical calculation in comparison with experimental result, it was demonstrated that multiple fracture of coating layr acts to reduce the energy release rate at crack tip in coated fiber. With the application of a Monte carlo simulation method, the mulytiple fracture phenomenon of the coating layr and its influence on fiber strength could be described well.

为阐明复合材料的界面力学行为，对复合材料中的多重断裂现象进行了实验、分析和蒙特卡罗模拟。主要研究结果总结如下。0/90/0型石墨/环氧层压板复合材料中90层的多次断裂现象是由于应力通过界面传递到90层造成的。应力分布分析和计算机辅助蒙特卡罗模拟表明，层间界面处厚度约为15微米的富树脂层起传递应力的作用。通过对超导Y-Ba-Cu-O和Bi(Pb)-Sr-Ca-Cu-O氧化物在银护复合线材中的多次断裂分析，表明复合材料的界面剪切强度为30 ~ 40 MPa。这是该领域的第一个发现。数值计算与实验结果对比表明，包覆层的多次断裂降低了包覆纤维裂纹尖端的能量释放率。应用蒙特卡罗模拟方法，可以很好地描述涂层的多次断裂现象及其对纤维强度的影响。

项目成果

S.Ochiai and K.Osamura: ""Influence of Multiple Cracking of Coating Layr on Fiber Strength"" Zeitschrift fur Metallkunde. (in press).

S.Ochiai 和 K.Osamura：“涂层多重裂纹对纤维强度的影响”，Zeitschrift Fur Metallkunde。

S.Ochiai,K.Hayashi and K.Osamura: "Estimation of Interfacial Shear Strength between Superconducting oxides and Silner-sheath from Multiple Fracture Phenomenon of the Oxides" Metallurgical Transactions. (印刷中).

S. Ochiai、K. Hayashi 和 K. Osamura：“根据氧化物的多重断裂现象估算超导氧化物和 Silner 鞘之间的界面剪切强度”（冶金学报）。

S.Ochiai and K.Osamura: "Influence of Multiple cracking of Coating Layer on Fiber strength" Zeitschrift fur Metallkunde. (印刷中).

S.Ochiai 和 K.Osamura：“涂层多重裂纹对纤维强度的影响”Zeitschrift Fur Metallkunde（印刷中）。

S.Ochiai: "Intluence of Multiple Craching on Fiber strengtl." Zeitschrift fur Metallkunde.

S.Ochiai：“多次撕裂对纤维强度的影响。”

S.Ochiai,K.Osamura,P.W.M.Peters and K.Schlte: "Estimation of The 90° Ply Strength Distribution and Shear Lag Parameter from Multiple Transverse Cracking in Graphite-Epoxy Cross-Ply Laminates" Materials Science and Engineering. (印刷中).

S.Ochiai、K.Osamura、P.W.M.Peters 和 K.Schlte：“石墨-环氧树脂交叉层压板中多重横向裂纹的 90° 层强度分布和剪切滞后参数的估计”材料科学与工程（正在出版）。 。