Experimental Studies on Micro-fracture Mechanics of High-Temperature Polymer Matrix Composites

高温聚合物基复合材料微断裂力学实验研究

• 批准号: 04452111
• 负责人: TAKEDA Nobuo
• 金额: $ 4.29万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04452111/
• 关键词: High-temperature Polymer; Composite Materialss; Laminates; Transverse Crack; Delamination; In-situ Microscopic Observation; Damage Modeling; Damage Mechanism; モデリング; クロスプライ

The pupose of the present investigation is to study experimentally the micro-fracture process and mechanism of high-temperarture polymer matrix composite laminates under quasi-static monotonic and repeated fatigue loadings. Three diffirent types of microscopes with displacement-rate-controlled loading devices were used for in-situ microscopic observations of damage initiation and growth. Cross-ply laminates were chosen as basic laminate configurations for high-performance carbon fiber reinforced high-temperature epoxy composites. The damage evolution includes the following three stages : (1)Transverse crack initiation in transverse layrs, (2)Multiple transverse crack formation, and (3)Initiation and growth of delamination from tips of transverse cracks. Based on the above quantitative experimental results, some new theoretical models were proposed to predict the damage evolution.1. The tested CFRP materials include (1)a conventional 180ﾟC-cured TGDDM/DDS system (T300/3601), (2)an impro … More ved toughened system(T800H/3631), (3)an interlaminar-toughened system with interlaminar resin film layrs(T800H/3631-FM300), and(4)a new interlaminar-toughened system with nylon-particle-dispersed interlaminar layrs(T800H/3900-2). The laminate configurations were[0/90_n/0](n=4,8,12).2. In-situ microscopic observations were successfully conducted by a combination of an optical microscope(OM), a scanning electron microscope (SEM), and a scanning acoustic microscope (SAM) with each loading stage. The microscopic deformation and failure processes such as, (1)transverse crack initiation in transverse layrs, (2)multiple transverse crack formation, and(3)initiation and growth of delamination from tips of transverse cracks, were observed at 20ﾟC and 80ﾟC to study the temperatue effects.3. A new evolution law for transverse crack development was proposed based on the statistical strength distribution of 90ﾟlayrs. A new evolution law for delamination from tips of transverse cracks was also proposed based on the energy balance concept. Both theoretical preditions were found to be sufficiently valid to explain the quantitative experimental results. An interaction between transverse cracks and delaminations was also considered for better prediction. These theories were also extended for fatigue-loaded specimens. Less

本文的目的是通过实验研究高温聚合物基复合材料层合板在准静态单调和重复疲劳载荷下的微观断裂过程和机理。三种不同类型的显微镜与位移速率控制加载装置用于原位微观观察损伤的启动和增长。正交铺设层合板被选为高性能碳纤维增强高温环氧树脂复合材料的基本层合板构型。损伤演化过程包括以下三个阶段：（1）横向层间横向裂纹的萌生，（2）多条横向裂纹的形成，（3）横向裂纹尖端分层的萌生和扩展。基于上述定量试验结果，提出了一些新的损伤演化理论模型.测试的CFRP材料包括（1）常规的180 ℃固化的TGDDM/DDS系统（T300/3601），（2）改进的TGDDM/DDS系统（T300/3601），（3）改进的TGDDM/DDS系统（T300/3601），（4）改进的TGDDM/DDS系统（T300/3601），（5）改进的TGDDM/DDS系统（T300/3601），（6）改进的TGDDM/DDS系统（T3601/3601），（7）改进的TGDDM/DDS系统（T3601/3601），（8）改进的TGDDM/DDS系统（T3600/3601），（8）改进的TGDDM/DDS系统（T3600/3601），（9）改进的TGDDM/DDS系统（T3600/3601），（8）改进 ...更多信息 Ved增韧体系（T800H/3631），（3）层间树脂膜增韧体系（T800H/3631-FM300），（4）尼龙粒子分散层间增韧体系（T800H/3900 - 2）。层压结构为[0/90_n/0]（n = 4，8，12）。通过光学显微镜（OM）、扫描电子显微镜（SEM）和扫描声学显微镜（SAM）的组合，成功地进行了原位显微观察。在20 ℃和80 ℃下，观察了横向层间横向裂纹萌生、多条横向裂纹形成、横向裂纹尖端分层萌生和扩展等微观变形和破坏过程，研究了温度效应.根据90个试件的强度统计分布，提出了一种新的横向裂纹发展规律。基于能量平衡的概念，提出了一种新的横向裂纹尖端分层演化规律。这两种理论预测被认为是足够有效的解释定量的实验结果。横向裂纹和分层之间的相互作用也被认为是更好的预测。这些理论也扩展到疲劳加载试样。少

项目成果

SHIWA,Mitsuharu TAKEDA,Nobuo KISHI,Teruo: "Acoustic Emission Wave Propagation Properties on CFRP Laminates by Using Simulated AE Source (in Japanese)" Journal of the Japan Society for Composite Materials. Vol.20, No.3. 108-115 (1994)

SHIWA、Mitsuharu TAKEDA、Nobuo KISHI、Teruo：“使用模拟 AE 源研究 CFRP 层压板的声发射波传播特性（日语）”日本复合材料学会杂志。

TAKEDA,Nobuo OGIHARA,Shinji: "Is Situ Observation and Probabilistic Prediction of Microscopic Failure Processes in CFRP Cross-ply Laminates" Composites Science and Tech. Vol.52, No.2. 183-195 (1994)

TAKEDA、Nobuo OGIHARA、Shinji：“CFRP 交叉层压板微观失效过程的现场观察和概率预测”复合材料科学与技术。

志波光晴,武田展雄,岸輝雄: "CFRP積層板を伝播する疑似AE波の伝播特性" 日本複合材料学会誌. 20(3). 108-115 (1994)

Mitsuharu Shiba、Nobuo Takeda、Teruo Kishi：“通过 CFRP 层压板传播的伪 AE 波的传播特性”日本复合材料学会杂志 20(3) (1994)。

N.Takeda,S.Ogiwara,A.Kobayashi: "In-situ Observation and Modelling of Micromechanical Failure Process in CFRP Cross-ply Laminates" Proc.9th Int.Comf.Comp.Mater.3. 351-358 (1993)

N.Takeda、S.Ogiwara、A.Kobayashi：“CFRP 正交层压板微机械失效过程的现场观察和建模”Proc.9th Int.Comf.Comp.Mater.3。

SHIWA,Mitsuharu TAKEDA,Nobuo KISHI,Teruo: "Response Properties of Piezoelectric AE Sensor on CFRP Laminates by Using Simulated AE Source (in Japanese)" Journal of the Japan Society for Composite Materials. Vol.20, No.4. 137-143 (1994)

SHIWA、Mitsuharu TAKEDA、Nobuo KISHI、Teruo：“使用模拟 AE 源的 CFRP 层压板压电式 AE 传感器的响应特性（日语）”日本复合材料学会杂志。