Dissipation

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Dissipation

Dissipation test data can be viewed in charts of value vs square root time. Test selection can be changed using test navigator to the left of the chart.

CPT_Dissipation_Unassessed

Assessments

Both normal and complex assessments of dissipation data can be completed.

Normal

Complex

CPT_Dissipation_Unassessed

CPT_Dissipation_ComplexAssessment

hmtoggle_arrow1How To: Assess a normal dissipation test

img_1 Select the u0 (estimated) edit mode:

CPT_Dissipation_EditMode_u0

img_2 Double-click a point along the data curve to define a start time to run the curve-fitting algorithm over the data to to right:

CPT_Dissipation_BasicAssessment

u0 is estimated based on extrapolation of the curve until an accepted tolerance is achieved. T50 (default) is assessed based on the ui and u0 values.

hmtoggle_arrow1How To: Assess a complex dissipation test

img_1 Select the u0 (estimated) edit mode:

CPT_Dissipation_EditMode_u0

img_2 Double-click a point along the data curve to define a start time to run the curve-fitting algorithm over the data to to right:

CPT_Dissipation_Complex_CurveFit

A curve will be fitted to data to the right of the start time, and u0 estimated based on extrapolation of the curve.

img_3 For the T-value assessment, select the uc edit mode:

CPT_Dissipation_EditMode_uc

img_4 Select a start and end time just to the right of the peak pressure:

CPT_Dissipation_Complex_uc

A point that more accurately represents the initial pressure (uc) will be added. T50 (default) is assessed based on the uc and u0 values.

noteNote

Assessment is limited to estimating the u0 value and T- values (default T50 changed in the data grid). T-values can only be assessed from the actual data line (blue), not from the extrapolated curve fit.