| 摘要 |
<p>It is a main object of the present invention to provide an exothermic fatigue measurement method of viscoelastic body and a hydraulic servo system flexometer which make it possible to directly measure a strain (displacement) applied to a testpiece and a stress (load), control the stress acting on the testpiece by hydraulic servo feedback control on the basis of the strain and the stress so measured, and accomplish high precision measurement. The hydraulic servo system flexometer according to the present invention includes an upper anvil (22) and a lower anvil (18) whose mutually opposing parallel planes form testpiece retaining surfaces, a hydraulic servo cylinder (19) whose piston rod (21) is connected to the upper or lower anvil (22 or 18) and operates in a direction perpendicular to the testpiece retaining surfaces, and a hydraulic servo mechanism for applying static and dynamic loads to the testpiece (23).</p> |
