Trowbridge E A, Crofts C E
Department of Medical Physics, and Clinical Engineering, University of Sheffield, Royal Hallamshire Hospital, England.
Biomater Artif Cells Artif Organs. 1989;17(3):315-28. doi: 10.3109/10731198909118287.
Destructive uniaxial load tests were performed on bovine pericardium that had been chemically modified by glutaraldehyde fixation. To investigate the tearing strength of this tissue, an artificial tear, in the form of a 2mm notch, was introduced into the test specimens. Specimens without a notch, harvested from the same sites in the pericardial sac but from different sacs, were used as controls. A video system with zoom and lens magnification facilities combined with low power oblique illumination was used to observe the events leading to tissue failure. Analysis of variance demonstrated that there was no overall significant difference in tensile strength or percentage strain at fracture between the test specimens with a tear and the control specimens without a tear. Rupture of the tissue occurred following laminate debonding by shear and fibre slippage through the viscous ground matrix.
对经戊二醛固定进行化学改性的牛心包进行了破坏性单轴载荷试验。为了研究这种组织的撕裂强度，在测试样本中引入了一个2毫米切口形式的人工撕裂口。从心包囊相同部位但不同心包囊中采集的无切口样本用作对照。使用具有变焦和镜头放大功能并结合低功率斜照光的视频系统来观察导致组织失效的过程。方差分析表明，有撕裂口的测试样本和无撕裂口的对照样本在拉伸强度或断裂时的应变百分比方面没有总体显著差异。组织破裂是由于层间剪切脱粘和纤维在粘性基体中滑动所致。
