摘要
根据复合材料力学中的经典层积材理论构建了尾巨桉单板/金属网复合层积材弯曲刚度的预测模型.经对由20、40和60目不锈钢金属网所组成的尾巨桉单板/金属网层积材进行模型验证,当不锈钢金属网为20和40目时,模型预测值与实测值具有很好的吻合度,相对误差分别为7.75%与1.38%,但日数为60日时,相对误差却达到了84.59%.结果表明,构建的模型能够准确预测尾巨桉单板/金属网层积材的弯曲刚度.
The bending stiffness of the laminated eucalyptus veneer/steel mesh lumber was modeled according to the theory of the classical laminated composites with the ultimate purpose of predicting the design strength value and optimizing its engineering applications. The lumbers using Eucalyptus urophyUa S. T. Blake × E. grandis W. Hill ex Maiden veneer and three different types of steel meshes were laminated to verify the proposed model. The results showed that the bending elasticity calculated by the proposed model had a good agreement with the bending elasticity measured by the three point bending test when the mesh grits used were 20^# and 40^#, and the relative error were 7.75% and 1.38% , and this implied that the proposed model was reliable in predicting the bending elasticity of the laminated eucalyptus veneer and steel mesh lumber. When the mesh grit was 60^#, however, there was a great difference between predicting values and the test results, with the relative error being as high as 84.59%. Three reasons were analyzed for the great difference.
出处
《华南农业大学学报》
CAS
CSCD
北大核心
2008年第3期96-100,共5页
Journal of South China Agricultural University
基金
华南农业大学校长基金(4400-K05107)
关键词
层积材
弯曲刚度
不锈钢金属网
模型
laminated veneer lumber
bending stiffness
stainless steel mesh
modeling