A Micromechanical Study of Thermal Stress-Induced Deformation and Microcracking in Ceramic-Metal Multiphase Solid Systems

陶瓷-金属多相固体体系中热应力引起的变形和微裂纹的微观力学研究

• 批准号: 63460200
• 负责人: WAKASHIMA Kenji
• 金额: $ 4.86万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1988
• 资助国家: 日本
• 起止时间: 1988 至 1989
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-63460200/
• 关键词: Composite Materials; Functionally Gradient Materials; Thermal Stress Relief; Micromechanics; Creep; Fiber Strengthening; Thermal Ratchet; 金属; セミラックス; 熱応力; マイクロメカニックス; ウィスカ

Based on the theory of "eigenstrains" (T. Mura: Micromechanics of Defects in Solids, Martinus Nijhoff Publishers, The Hague, 1982) which has been developed for the study of the mechanical behavior of materials from the micromechanics point of view, we have investigated the mechanisms of deformation and fracture processes occurring in a class of inhomogeneous solid systems which contains ceramic fibers or particulates in a metal matrix. Throughout this research we emphasize the role played by internal stresses due to the mismatch in thermomechanical properties between the ceramic and metal phases.The subjects we have dealt with are:1) analysis of stress and strain fields by taking the metal phase plasticity unto account,2) prediction of effective thermoelastic properties (elastic constants and thermal expansion coefficients) for systems with perfectly bonded and perfectly debonded phase interfaces,3) modeling of work-hardening and recovery processes, and4) derivation of constitutive equations for creep under isothermal and thermal-cycling conditions.In relation to the last subject, some experiments have also been made. Finally, implications of this research in the design of Functionally Gradient Materials (FGM) are discussed.

根据“本征应变”理论（T.穆拉：固体中的缺陷的微观力学，MartinusNijhoff出版社，海牙，1982），它已发展为研究材料的力学行为的微观力学观点，我们研究了一类非均匀固体系统中发生的变形和断裂过程的机制，其中包含陶瓷纤维或颗粒在金属基体中。在整个研究过程中，我们强调由于陶瓷相和金属相之间的热机械性能不匹配而引起的内应力所起的作用。我们所处理的主题是：1）考虑金属相塑性的应力应变场分析; 2）有效热弹性性能预测（弹性常数和热膨胀系数），3）加工硬化和恢复过程的建模，（4）等温和热循环条件下的蠕变本构方程的推导。最后，讨论了本研究在梯度功能材料设计中的应用。

项目成果

Tohru,HIRANO: "An Improvement of Design Accuracy of Functionally Gradient Materials for Space Plane Appilications" Proc.of the 17th Intrnational Symposium on Space Technology and Science(Tokyo,Japan),(in press). (1990)

Tohru,HIRANO：“提高空间飞机应用的功能梯度材料的设计精度”第 17 届国际空间技术与科学研讨会（日本东京）会议记录（正在出版）。

若島健司: "FGMの熱応力解析のための物性デ-タ推定法" 第3回傾斜機能材料シンポジウム講演集(傾斜機能材料研究会). 165-170 (1989)

Kenji Wakashima：“FGM热应力分析的物理性质数据估计方法”第三届功能梯度材料研讨会论文集（功能梯度材料研究组）165-170（1989）。

Kenji,WAKASHIMA: "Plastic Anisotropy of Metal Matric Composites with Multidirectional Elastic Fibers" Mechanical and Physical Behaviour of Metalic and Ceramic Composites(Ed.by S.I.Andersen,H.Lolholt and O.B.pedersen,RISO National Laboratory,Roskilde,Denma

Kenji，WAKASHIMA：“具有多向弹性纤维的金属基复合材料的塑性各向异性”金属和陶瓷复合材料的机械和物理行为（S.I.Andersen、H.Lolholt 和 O.B.pedersen 编辑，RISO 国家实验室，Roskilde，Denma

K. Wakashima, B. H. Choi and T. Mori: "Plastic Incompatibility and Its Accommodation by Diffusional Flow: Modeling of Steady-State Creep of a Metal Matrix Composite" Mater. Sci. Eng.

K. Wakashima、B. H. Choi 和 T. Mori：“塑料不相容性及其通过扩散流的调节：金属基复合材料稳态蠕变的建模”。

K. Wakashima, H. Tsukamoto and B. H. Choi: Elastic and Thermoelastic Properties of Metal Matrix Composites with Discontinuous Fibers or Particles - Theoretical Guidelines toward Materials Tayloring, Proc. of the Korea-Japan Metals Symposium on Composite M

K. Wakashima、H. Tsukamoto 和 B. H. Choi：具有不连续纤维或颗粒的金属基复合材料的弹性和热弹性性能 - 材料泰勒化的理论指南，Proc。