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中文摘要：
为了预测动脉低温保存过程中所受到的机械损伤，本文建立了一维轴对称弹性圆筒血管在低温下保存的热应力 计算模型，模拟计算了冻结过程中体积膨胀引起的热应力随时间变化及其在壁面的分布，通过计算了解降温速率和血管尺寸不同的影响。计算结果显示径向应力小于周向应力和轴向应力；降温速率越快，组织内部所受热应力越大，壁厚越厚，热应力越大；产生超过热应力极限值的降温速率比在血管壁上产生裂纹的降温速率小许多。计算分析的结果与实验观察到的裂纹情况相符。
英文摘要：
The aim of this study was to predict the cryoinjury that was caused by thermal stresses during cryopreservation of living arteries. A thermal stress analysis model was developed for freezing process taking place inside a axial symmetry cylinder blood vessel. The model allows us to predict the varying of thermal stress with time passing and the influence of detemperature rate and size of artery. We get that the radial stresses are less than circumferential stresses and axial stresses. We also get that the qu...
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