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Strain, stress can be quantified


    Strain, stress can be quantified is the Sigmar invention patents authorized by the state.

To do with the accelerometer sensor aging equipment can only identify the workpiece vibration forced vibration frequency ω (that is, motor speed n) and the workpiece placed on the point of the acceleration sensor g (or A), as well as identification by these two parameters, the workpiece -- Motor - pad the system's resonance frequency ω i, or n i (usually considered to be similar to the natural frequency of the workpiece), the workpiece does not recognize the internal stress σ r (ie residual stress) and the vibration of the amplitude of dynamic stress σ d the value of the size of its changes. 

VSR critical process parameters are the dynamic stress σ d judge VSR effect of the most direct indicator is the residual stress σ r at the vibration values before and after vibration and its changes.

Strain, stress can be quantified is the other instruments without VSR equipment can be used only for the workpiece r), r) and vibration in the process (ε),d) direct detection, in order to give specific values and to detect the vibration of aging changes in the process of ε; (ε) = d) + (△ ε r), when the vibrations generated during aging can not be a permanent restoration when the strain that is △ ε r, we can calculate the vibration of limitations caused by residual stress values; can also detect residual stress σ r directly measured by the number of parts are actually left internal stress.

Sigmar-SQUAT Series VSR device can take strain gauges measured directly mobilized strain, residual strain and to detect and dynamic response and speed of the corresponding relationships can be measured directly in vibration before the workpiece residual stress, vibration, recorded in the aging process ε d -- n curve, find the peak of the corresponding dynamic strain was speed, in order to identify the optimum process parameters, but also record the limitation of strain release △ ε r of time changes; operator can take this to be the release of residual stress the value of △ σ r, after the time the workpiece can be measured by the final residual stress.

Readers recommend that users refer to the following concepts:
Dynamic stress, permanent strain, vibration to the stress