Studies on the Measure to Counter Leg Weakness in Swine and Mechanical Properties of Bone

本研究采用压痕法、平行板压缩法和三点弯曲法对20 ~ 30周龄正常饲养的杂种猪股骨进行了力学性能的测定，并将其股骨端切下，进行了压痕试验。另一方面，从骨柄上切下的圆柱形标本，猪股骨关节软骨的压痕强度为20-40 N/mm ~ 2;关节软骨的表观弹性模量为41-161 N/mm ~ 2;骨柄的测试样本经受平行板压缩或三点弯曲，显示出弹性行为。4）骨柄的压缩强度在134-219 N/mm 2之间变化。5）骨柄的弯曲强度被发现为158-261 N/mm 2。6）骨柄由于弯曲而产生的弹性模量约为8400-16600 N/mm 2。

Mechanical Properties of thighbones of crossbred swine which were fed a normal diet and were about 20^-30-week-old, were determined through the indentation, the parallel plates compression, and the three-point bending tests.Raw specimens which were the tip of thighbones cut out from the whole-bone, were tested in indentation. On the other hand, cylindrically formed specimens which were cut out from the bone stems, were tested in parallel plates compression and three-point bending.Mechanical Properties of swine thighbones are summarized as follows.1) The indentation strength for joint cartilage of thighbone ranged from 20-40 N/mm2.2) The apparent modulus of elasticity for joint cartilage of thighbone was found to be 41-161 N/mm2.3) Test specimens of bone stem which were subjected to parallel plates compression or three-point bending, showed an elastic behavior.4) The compressive strength for bone stem varied from 134-219 N/mm2.5) The bending strength for bone stem was found to be 158-261 N/mm2.6) The modulus of elasticity of bone stem due to bending was about 8400-16600 N/mm2.