首页>
外国专利>
METHODS FOR DETERMING VELOCITY OF A STRESS WAVE WITHIN A MATERIAL AND HOMOGENEITY OF PROPERTIES WITHIN THE MATERIAL
METHODS FOR DETERMING VELOCITY OF A STRESS WAVE WITHIN A MATERIAL AND HOMOGENEITY OF PROPERTIES WITHIN THE MATERIAL
展开▼
机译:确定材料内应力波速度和材料内特性均质性的方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
Methods for evaluating properties of a material are provided. In a first method, the velocity of a stress or sound wave is calculated by measuring the time of flight of the stress/sound wave induced into the material. The resonance of the material is also measured after the wood product is contacted. A separate velocity of the sound wave within the material is calculated using the resonance measurements. A comparison of the individual velocities provides an indication of the homogeneity of properties of the material. The properties may be, for example, stiffness, strength, various gradients or the like. In a second method of the present invention, the velocity calculated using the time of flight method may be used as a guide in determining a fundamental frequency for the stress wave within a material and resultant velocity. The material may be, for example, wood, metal, plastic or the like.
展开▼