摘要
结合Eshelby夹杂理论和Mori-Tanaka方法推导陶瓷基体中含两种以上不同形状和不同力学性质的夹杂情况下,复合材料的有效力学性能计算的广义Mori-Tanaka解析计算式,分析颗粒与短纤维夹杂对复合材料有效力学性能的影响,并用三维均质化法检验所得解析式的可靠性。结果表明,解析模型与均质化法得到的结果非常吻合,不同形状的夹杂对有效力学性能的影响很大,短纤维增强相能够有效改善复合材料沿短纤维方向的纵向有效力学性能,对提高多相混合增强陶瓷基复合材料的刚度和强度起主要作用;球状颗粒增强相能有效改善复合材料的横向有效力学性能,并保持复合材料强度的稳定性,不同形状的夹杂能够综合改善陶瓷基复合材料的力学性能。
A theoretical formula（general Mori-Tanaka theory,GMT） combining the Eshelby＇s inclusion theory with Mori-Tanaka method was derived to analyze the effective mechanical properties of ceramic composites reinforced with short-fiber and spherical particle.The effect of short-fiber and spherical particle on the effective mechanical properties of composites was investigated,and the reliability of the results was verified by the three-dimensional homogenization method（HM）,and a good agreement was shown for two methods.The results show that the shapes of inclusions have obvious effect on the effective mechanical properties of ceramic composites,and the short-fiber is prior to the spherical particle to obtain a high longitudinal effective elastic modulus,and to improve the stiffness and strength of multi-phase hybrid ceramic composites.The spherical particle is effective to improve the transverse effective elastic modulus,and to keep the stability of the strength for ceramic composites.The hybrids of inclusions with different shapes are beneficial to improve the effective mechanical properties of ceramic composites synthetically.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2013年第7期26-31,36,共7页
Journal of Wuhan University of Technology
基金
国家自然科学基金(11172066/A020305)
广东省自然科学基金(S2011010004874)
佛山市科技发展专项基金(FZ2010033)
长沙理工大学电力与交通材料保护省重点实验室开放基金(2012CL06)
作者简介
罗冬梅（1965-），女，博士，教授．E-mail：dongmei-1uo@126．com
