TECHNIQUE OF DURABILITY ESTIMATION FOR THIN BERYLLIUM FOILS DURING THEIR WORK IN X-RAY DETECTORS
TECHNIQUE OF DURABILITY ESTIMATION FOR THIN BERYLLIUM FOILS DURING THEIR WORK IN X-RAY DETECTORS
复制标题
薄铍箔在X射线探测器工作过程中的耐久性评估技术
DOI：
--
复制
发表时间：
2018
期刊：
影响因子：
--
通讯作者：
A. Minchena
中科院分区：
文献类型：
--
作者：
V. Mishin;I. Shishov;A. Minchena
用有限元法计算了圆形薄铍窗在外压循环载荷作用下的应力应变状态。提出了铍窗断裂概率的估算方法。技术是将箔中的累积塑性应变与通过箔样品弯曲测试实验确定的临界塑性应变的某个值进行比较。对8 μm厚的铍合金窗进行了外压循环载荷下的耐久性试验研究。良好的收敛性之间的预测和事实数的载荷循环没有断裂。
The stress-strain state for thin beryllium windows of circular shape under cyclic loading by external pressure was calculated using finite element method. The technique for estimating the beryllium window’s fracture probability was proposed. Technique is to compare the accumulated plastic strain in a foil with a certain value of the critical plastic strain, determined experimentally by foil samples bending tests. An experimental study of the durability for beryllium windows with a thickness of 8 μm under cyclic loading with external pressure was performed. Good convergence between the predicted and the fact number of load cycles without fracture was established.