The circumferential strains at the outer surface of the model are measured with strain gages after the tubes are pulled out of the model. 应用电阻应变片测量了换热管从单管模型中拉出后该模型外表面的周向应变，并根据弹性理论从周向应变计算出残余接触压力的实验值。
The tests results proved that better experimental data could only be obtained by the combination of resistive strain measuring and optical fiber strain measuring. 试验结果证明，只有将电阻应变片测试技术和光纤应变测试技术有机结合，才能得到较好的试验数据。
