薄板类中密度纤维板动静态弹性模量的检测

摘要

@@ 植物挥发物在植食性昆虫的寄主选择和产卵选择中起着重要作用(杜家纬,2001).薄板类中密度纤维板的弹性模量(MOE)是表征其力学性能的主要指标之一.传统都是采用简支静曲测试方法,该方法过程繁琐、消耗时间长(赵仁杰等,2003;Ross et al.,1998).依据振动法测定木质材料的力学性能,过去几十年来已经被证明是一种成功的方法(Moslemi,1967;Ross et al.,1994),测定结果显示振动法测得的力学性质与传统静态弯曲测得的弹性模量间有非常好的一致关系.%This paper aims to quicker test the modulus of the thin wood composites, and developed a new nondestructive test method based on the principle of cantilever-beam bending and vibration.A cantilever beam testing apparatus has been developed to provide a means of dynamic and non-destructive evaluation of modulus of elasticity for small samples of thin wood composites.Five kinds of medium density fiber-board (MDF) were tested, and the testing results demonstrate that there are good linear relationships between the static modulus and the dynamic modulus.