Shape memory alloy pipe joint tightening stress testing apparatus and testing method

Shape memory alloy pipe joint tightening stress testing apparatus and testing method, symmetrical inner wall is taken over two strain gauges attached, with the dynamic strain gage is connected to the tester, four rope grooves and pass through the fixed loading block rear pulley, the weight loading at its ends to achieve different pressure pi is applied to the outer wall is taken over by changing the weight of the load weight; dynamic strain tester to take over the inner wall being attached to strain gauges at different pressure generated strain ei, be taken over by the outer wall so as to obtain an inner wall of the pressure p and the calibration relationship between the strain e curve. With this calibration relation can be easily tested shape memory alloy pipe joint tightening pressure is taken over by the heat generated during the recovery process.