气管软骨应力松弛的实验研究

The Experimental Study of Tracheal Cartilage Stress Relaxation

以应力松弛的试验方法研究气管软骨的应力松弛特性,为临床提供气管软骨的应力松弛特性参数。在日本岛津电子万能试验机上对10个软骨进行应力松弛实验,应力松弛实验应变增加速度为50%/min,实验温度为(36.5±0.65)℃,设定实验时间7 200 s,采集100个实验数据,以一元线性回归分析的方法处理实验数据。结果表明:气管软骨7 200 s应力松弛量为0.316 MPa,7 200 s时应力松弛曲线基本达到平衡。气管软骨应力松弛曲线是以对数关系变化的,气管软骨为非线性粘弹性材料。

To research the tracheal cartilage stress relaxation characteristic and provide the tracheal cartilage stress relaxation characteristic parameter for the clinical. 10 cartilages were taken on the electronic universal testing machine to carry on the stress relaxation experiment. The increasing speed of the stress relaxation experiment strain was 50%/min. Experimental temperature was （36.5 ± 0.65 ）℃, the experimental time was set at 7 200 s. Then 100 empirical data were gathered and processed by the method of Unary Linear Regression Analysis. The tracheal cartilage 7 200 s stress relaxation quantity was 0. 316 MPa, the 7 200 s stress relaxation curve achieved the balance basically. The tracheal cartilage stress relaxation curve is changed by the logarithm relations, the tracheal cartilage is the non- linear viscoelastic material.