摘要
弹性模量是衡量人造板材料力学性能的重要指标,用标准差法对其进行综合评价尤为必要,对其实测及方差分析具有较好的应用价值。采用三点弯曲静力法和悬臂梁自由端振动法,测定各向同性HDF、三合板和OSB试材的静弹性模量和动弹性模量。在实测数据分析中,为反映总体弹性模量实测值数据集的离散程度及落在样本统计值某一区内的概率,还确定了其置信区间,评价了置信度。结果表明:各向同性人造板材料的静弹性模量和动弹性模量测试结果一致,其置信区间越大,置信水平越高。
Modulus of elasticity is an important index to judge the mechanical properties of isotrope wood-based panels.The integrated evaluation to the elasticity modulus indexes by means of Standard Deviation method was essential that had significant application value to the actual measurement and variance analysis of the indexes.The static and dynamic elasticity moduli of three layer plywood,HDF and OSB trial materials were measured by means of the static force method of 'three-point curve' and the vibrational method of 'cantalever grider' freeness end.The confidence interval was determined and the confidence level was evaluated for the measured data analysis in order to reflect the dispersion degree of the measured data of the elasticity moduli,and the probability for the data to fall into a certain sample statistics zone.The results showed that the static and dynamic elasticity moduli test results were consistent,and the wider the confidence interval was,the higher the confidence level would be.
出处
《西南林业大学学报（自然科学）》
CAS
2012年第1期83-87,共5页
Journal of Southwest Forestry University：Natural Sciences
基金
江苏省科技型中小企业技术创新资金(苏北部分)项目(BN2008058)资助
2011-2013年江苏高校优势学科建设工程项目资助
关键词
人造板
弹性模量
标准差
置信区间
置信水平
综合评价
wood-based panels
elasticity modulus
standard deviation
confidence interval
confidence level
comprehensive evaluation
