Pressure Consolidation of Fiber‐Reinforced Oxide Matrix Composites: Experiments and Simulations
Pressure Consolidation of Fiber‐Reinforced Oxide Matrix Composites: Experiments and Simulations
复制标题
纤维增强氧化物基复合材料的压力固结：实验和模拟
DOI：
--
复制
发表时间：
1996
期刊：
影响因子：
--
通讯作者：
R. McMeeking
中科院分区：
文献类型：
--
作者：
A. Casagranda;Junde Xu;A. Evans;R. McMeeking
对细颗粒多孔Al{sub2}O{sub3}试件进行了单轴固结实验，确定了其本构关系。这些实验包括载荷和应变的同时测量，以及颗粒尺寸的确定。在较宽的应力和温度范围内，当相对密度至少达到0.9时，数据符合幂定律，即固结的晶界攀升机制。对复合材料试件的固结试验表明，无论是加固还是孔洞附近的基质密度都存在空间变化。使用矩阵本构关系进行的有限元计算与使用图像分析得到的矩阵密度图进行了很好的比较。
Uniaxial consolidation experiments conducted on porous Al{sub 2}O{sub 3} specimens with fine particle size have allowed the constitutive law to be determined. These experiments involved simultaneous measurements of load and strain, coupled with grain size determinations. The data over a wide range of stress and temperature are consistent with a power law, grain-boundary-climb mechanism of consolidation, at relative densities up to at least 0.9. Consolidation experiments on composite specimens have identified a spatial variation in matrix density near either a reinforcement or a hole. A finite element calculation performed using the matrix constitutive law compares well with a density map of the matrix made using image analysis.