【摘要】 本文用电测法探讨测量人体新鲜骨骼应变的若干特殊问题。通过对多种测试方法的比较和大量实验数据的分析，对用电测法测量人体新鲜骨骼的应变时应变片与粘贴剂的选用，应变片的粘贴方法与防护，温度效应与温度补偿等问题进行了初步探讨，并提出了一些看法。这对深入研究骨骼机械性能，骨骼的应力应变分析，假体的受力分析与研制，以及其他有关生物力学问题的研究，具有实际意义，提供了可靠的测试手段。更多还原

【Abstract】 ABSTRACTFresh human bone is an anisotropic material.Because of the complexity of the shape of bone section, during the survey of strain, the use of a strai-nometer is restricted owing to its installed form and length, as usual, it can only determine the average strain in a certain range.But measurement by strain gauge may overcome the disadvantages mentioned above.This is a more con-venient and accurate method to determine the strain at any directions, even at any limited range (point) of any part .Futhermore, it may also determine the strain in a dynamic state.It is of significance in practice, not only measurement of the mechanical properties of fresh bone, but in the study of prosthesis and other biomechanical problems.Since fresh human bone contains water and fat, the insulated and thermal conductive properties are poor, and the temperature effect is more severe. Therefore, the choice of strain gauge and adhesive, adherence method and protection of strain gauge, temperature effect and temperature compesation are the chief problems which must be studied and resolved.The tensile strain and compressive strain of fresh human humerus, fibula and femur were tested by strain gauge in our experiment .Conclusions are as follows. 1 ) To determine the stiain of fresh bone, the paper base gauge is better, since the adherent strength is higher than that in adherent carrier.KH 502 adhesive-cyanoacrylate is recommended for use; 2 ) The adherent place ofgauge must be treated carefully, the cleaning area should bs 4-5 times as large as the area of gauge.Acetone can be used as a cleaning agent. Because the property of thermal conductivity is poor in fresh bone, the gauge can not be sealed with wax to protect from damp.After adhering for more than an hour, the gauge can be used for measurement,. 3 ) The temperature effect of the fresh human bone is very severe, the effects in different parts or different directions of the same bone are quite different, in lateral direction, it is 5.5 times as much as that in low carbon steel, and in the axial direction, it is 4.4 times as much as that in steel.Therefore, when the temperature compensation is applied, the symmetric bone of same cadaver can only be used.The passive gauge must be placed at the same site with same direction as the work gauge has been placed.Otherwise,the significance of the passive gauge may be lost, and a remarkable error may appear in measurement.更多还原