【摘要】 用共振法分别测出同种竹材不同高度的动态杨氏模量,分析其与竹节长、密度和纤丝角的关系。结果表明,随着竹节高度增大,竹材的密度增大,动态杨氏模量也增大,而竹材的内耗则不断下降;同时,竹节高度增大,竹材的纤丝角变小,动态杨氏模量变大,而内耗变小。因此,影响同种竹材不同部位的动态杨氏模量的主要因素是密度和纤丝角。更多还原

【Abstract】 Resonance tests were conduced to measure the dynamic Young’s modulus(DYM) at different position of the culmin hight.The relationship of DYM,density and microfibre angles(MA) were analyzed.The results showed:the density and DYM increased with increase of node length of bamboo(NLB) but dynamic loss angle(DLA) decreased;MA showed negative correlation with NLB.DYM and DLA depends on MA,the smaller the MA is,the bigger the DYM is,and the smaller the DLA is.The density and MA are main factors which affect the DYM and DLA of different part of bamboo.更多还原