a multi - functional test machine is provided . the machine includes a frame with a pair of upright columns parallel extended upward from a foundation , an upper crosshead system slidably engaged on the columns and actuated by a pair of hydraulic jacks butting the columns , a ball bearing suspending from a hollow sphere casing in the upper crosshead system to connect with an upper specimen grip and fastened by a plurality of hydraulic buckles , a lower crosshead system fixed to a lower part of the columns including a rotatable hydraulic cylinder and a linear hydraulic cylinder disposed in alignment in the system to rotatably or slidably actuate a actuator shaft to which a lower specimen grip is engaged so that the test machine in capable of self - alignment and carrying out both torsion and tension - compression test for a specimen , this disclosure further includes a series of detective apparatus such as stress sensors , rotatable and linear displacement detectors which send the tension and displacement information of the specimen grips to a computer and automatically make stress compensations to the upper specimen grip .