落叶松材静、动弹性模量测试分析

木材不是完全弹性体,其力学性质具有明显的粘弹性。静态试验测试的静弹性模量和动态试验测试的动弹性模量有一定差别。文中对落叶松材纤维方向弹性模量的测试表明,落叶松材的动弹性模量比静弹性模量平均大15％左右。文中采用的锤击力振动梁测量系统测试动弹性模量快速、简便,并有较高的精度和可信度。

Investigation of the Static and Dynamic Moduli of Elasticities of the Wood of Larix dahurica

Being not a perfect elastic substance, wood behaves some vis-coelastic properties in many respects. Its Static and dynamic moduli of elasticities are not equivalent in values as tested with the wood of Larix daburica in terms of compression parallel to the grain. The latter is about 15 percent higher than the former. The method for determing the dynamic modulus adopted in the present experiment was found not only simple and convenient, but also highly precise.