In-Plane Stiffness of Semiauxetic Laminates

被引:36
作者
Lim, Teik-Cheng [1 ]
机构
[1] SIM Univ, Sch Sci & Technol, Singapore, Singapore
来源
JOURNAL OF ENGINEERING MECHANICS-ASCE | 2010年 / 136卷 / 09期
关键词
Composite laminate; Effective modulus; Rule-of-mixture; Semiauxetics; NEGATIVE POISSONS RATIO; MASS-TRANSPORT PROPERTIES; AUXETIC MOLECULAR-SIEVES; HOST-GUEST SYSTEM; MECHANICAL-PROPERTIES; POLYURETHANE FOAM; BEHAVIOR; POLYMERS; DESIGN; FIBERS;
D O I
10.1061/(ASCE)EM.1943-7889.0000167
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
In this note it is shown that the combination of conventional laminas (possessing positive Poisson's ratio) and auxetic laminas (possessing negative Poisson's ratio) gives rise to effective in-plane composite laminate Young's modulus that surpasses the rule-of-mixture formula. To enable comparison between the developed model with the rule-of-mixture, the former is presented in such a way that two correction functions exist distinctively for multiplication into the two terms of the rule-of-mixture formula. Each of the two correction functions reduces to a minimum of 1 when all laminas possess equal Poisson's ratio, and the correction functions are greater than one when there exists mismatch in the Poisson's ratios among the laminas in the laminate. Plotted results show that the overshooting of the laminate's effective in-plane modulus is significant for semiauxetic laminates but not for conventional and fully auxetic materials.
引用
收藏
页码:1176 / 1180
页数:5
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