Qiao Y, Pan E, Chakravarthula S S, Han F, Liang J, Gudlavalleti S
Department of Civil Engineering, University of Akron, Akron, OH, 44325-3905, USA.
J Mater Sci Mater Med. 2005 Feb;16(2):183-8. doi: 10.1007/s10856-005-5988-5.
In this paper, a pig's rectum was studied as a model biomaterial and its mechanical behaviors under tensile, compressive, and shear stresses were measured accurately using a multipurpose microtesting system. Based on the stress-strain relations of samples of different orientations, the tangential moduli were calculated through a reverse method combined with self-correlation analysis. The experimental data exhibited pronounced nonlinear and anisotropic characteristics. It was found that the effective compliance in tension along the longitudinal direction was larger than that along the circumferential direction, but smaller than that along the out-of-plane direction.
在本文中，研究了猪的直肠作为一种模型生物材料，并使用多功能微测试系统精确测量了其在拉伸、压缩和剪切应力下的力学行为。基于不同取向样品的应力-应变关系，通过结合自相关分析的反向方法计算了切向模量。实验数据呈现出明显的非线性和各向异性特征。结果发现，沿纵向拉伸时的有效柔度大于沿周向的有效柔度，但小于沿平面外方向的有效柔度。
