Overview

csDYNA

The Clisp Studio csDYNA module is an add-on to the core package (csHost) that makes it easy for you to set-up, control and monitor both Consolidated Drained (CD) and Consolidated Undrained (CU) Dynamic (Cyclic) Triaxial Testing in soil testing laboratories, and collate and output the results in industry standard or User defined format.

Create

Dynamic (Cyclic) Triaxial Test Setup

Clisp Studio csDYNA comes with the easiest test creation and setup of any Geotechnical Shear software package available today. Choose the test type you require (Consolidated Drained or Consolidated Undrained), select the appropriate Standard and proceed through the steps of the wizard, initially setting up the specimen details and hardware relevant to your Test set up.

Dynamic (Cyclic) Triaxial Test Definition

Consolidated Drained and Consolidated Undrained Test Types

Clisp Studio includes everything you need to create Consolidated Drained (CD) and Consolidated Undrained (CU) Dynamic (Cyclic) Triaxial Tests and will perform these tests against the ASTM D3999-11 or ASTM D5311-11 standard as selected.

Wizard Driven Setup

A powerful and intuitive Test Wizard will guide you through the Setup, from the selection of the Hardware to be used and details of the Specimen, through to the data you require for the Saturation, Consolidation, (optional) Stress Path and Shear stages.

Personalised Hardware Setup

The Hardware setup screen will only show you the choices relevant to your selected Test Type and Installed Hardware, this enables you to easily select the right Instrument required for Control or Transducer Input.

Specimen Details Setup

The Dimensions setup screen will automatically calculate and display the Specimen’s Area, Volume and Bulk Density from the data entered by the User. Similarly, the Moisture setup screen will automatically calculate and display the Specimen’s Moisture, Dry Density, Voids Ratio and Degree of Saturation from the entered data.

Configure

Dynamic (Cyclic) Triaxial Test Configuration

With Clisp Studio you have complete control of Dynamic (Cyclic) Triaxial Testing for Saturation, Consolidation, Stress Path (Optional) and Dynamic Testing. Every aspect of each stage can be configured to perform a standards based test or a a custom test specific to your exact needs.

Saturation Stage Setup

We support both ‘Step’ and ‘Ramp’ Saturation methods and the incremental Cell Pressure steps to saturate the specimen are easily set up. All appropriate calculations are performed automatically as the stage progresses with all relevant data logged at your specified intervals. You can choose when to terminate the stage and an advanced option enables you to maintain the Back Pressure obtained at the end of the previous step for the subsequent one. The whole Saturation process can be automated with the use of an Automatic Solenoid Valve.

Consolidation Stage Setup

We support both Isotropic and Anisotropic Consolidation but the Anisotropic screens are only presented if Mean Net Stress and/or K0 testing are requested by ticking a checkbox at the end of the Isotropic stage.

Isotropic Consolidation Stage Setup

The Isotropic Consolidation stage initial starting conditions can take into account the information available from the Saturation stage if required as well as any other selected factors (such as drainage corrections). All relevant data is logged using the prescribed table of time intervals and you can specify that the Consolidation stage be stopped when the Pore Water Pressure dissipation exceeds a specified percentage and/or a specified maximum time is exceeded.

Anisotropic Consolidation Stage Setup

The initial parameters for the Anisotropic Constant Mean Stress Test are the Effective Mean Stress and Back Pressure to be maintained, the rate at which to ramp the Deviator Stress to achieve the specified K Line and the rate at which data is to be logged. The stopping conditions can depend on the Deviator Stress and/or Axial strain values and/or a specified maximum time and the K0 stage may be skipped if not required.

The initial parameters for the Anisotropic K0 Stage are the Back Pressure to be maintained whilst ramping the Effective Cell Pressure to the required value at the specified rate and the data logging rate. The K0 Stage stopping conditions can depend on the Effective Mean Stress and/or Deviator Stress and/or Axial strain values and/or a specified maximum time.

Stress Path Stage Setup

The Stress Path Test does not normally form part of a standard Dynamic (Cyclic) Triaxial Test and is not therefore selectable by default, but may be included if required. The Stress Path Test consists of one or more schedules using either the Cambridge or MIT version of the test.

Each schedule consists of a Target Total Stress and Target Deviator Stress to be achieved within a specified time period by applying a calculated required Cell Pressure, Back Pressure and Load and a graph is available to show the expected stress path. The Stress Path stage completion may be specified. The Stress Path stopping conditions can depend on the Deviator Stress and/or Axial strain values and/or a specified maximum time.

Dynamic Testing Stage Setup

The Dynamic Testing Stage will consist of one or more Ramp and Cyclic schedules where you Ramp to the required starting conditions and then carry out the required cyclic test. It is usual to ramp and maintain the Cell and Back Pressure and the Vertical Force (or Vertical Displacement), although one or more may be maintained at their current value.

The Cyclic schedule will require the waveform to be specified (Sinusoidal, Triangular, Square Wave, Haversine, Saw-Tooth or User-Defined), together with the Cycle Count, Data Logging Rate, Frequency and Amplitude.

The User-defined waveform can specify up to 1000 points, each specifying a Time (in msecs) and an equivalent Setpoint (either Displacement (mm) or Force (kN) dependent upon the Control Option) with movement advised to be relative to the current feedback of the sensor’s position.

Because the implementation of a Dynamic Cyclic schedule is to a great extent up to the User’s own requirements, the User specifies the particular stop condition(s) for the schedule by a variable(s) being tested logically to a threshold level(s).

Dynamic Stage Setup

Execute

Dynamic (Cyclic) Triaxial Test Execution

You are able to monitor the status and condition of the Dynamic (Cyclic) Triaxial test as it proceeds. Live Views, Graphs and Tables show test progress while summary windows give Instrument, test and sample status at a glance.

Live Test Views

For all four stages (Saturation, Consolidation, Stress Path (if selected) and Shear) we offer predefined live data views to observe the most commonly measured variables and calculated data for the specimen being tested, whilst the Test Stage is running. This enables the User to keep a close on eye on the measured parameters to check that everything is progressing well. Clisp Studio also enables the User to customize the desired Live Data from the list of variables that are relevant to that particular stage.

Live Graphical and Table Views

For all three stages (Saturation, Consolidation and Shear) Clisp Studio enables the User to monitor the Test progress both graphically and in the form of a table whilst the Test Stage is running. There are Predefined Graphs which plot using the usual axes and predefined Tables which display the most commonly measured parameters and expected results as the Test progresses, but the User can also customize the desired Graphs and Tables from the list of variables that are relevant to that particular stage.

Report

Dynamic (Cyclic) Triaxial Test Results

As well as the completed Live Data View, Graphs and Table, csTriax gives you a number of results tables.

Saturation Results

The Saturation Results table provides the Volume Change and B-Value from the input Cell Pressure, Back Pressure and Pore Water Pressure input.

Consolidation Results

The Consolidation Results table provides the PWP Dissipation % and Volume change from the PWP & Volume input.

Stress Path Results

The Stress Path Results table provides the Total Stress and Deviator Stress from the target Stress and Deviator Stress.

Dynamic Test Results

The Dynamic Test Results table provides the Cyclic Shear Strain, Young's Modulus, Damping Coefficient from the input Poisson Ratio and Shear Modulus for the selected cycle.

Data Export and Import

Clisp Studio has the ability to export the entire Test to MS Excel for further data manipulation. The Test can also be exported to a script file which can be imported when creating a new Test if desired. This enables Tests from the current or older versions of Clisp Studio to be cloned or even rerun if required.This facility is extremely useful for Test exchange between laboratories or investigation of an issue by VJ Tech.

PC Minimum Specifications	Please see this document for a complete specification
System Requirements	MS .Net V4.0, MS SQL Server (or Express)
Dynamic Triaxial Test Types	Consolidated Drained, Consolidated Undrained
Supported Standards	ASTM D3999-11 & D5311-11
Import / Export Formats	XLS, PDF, XML
Standard Graphs	Saturation: Time vs. Pore Water Pressure Input Consolidation: Isotropic: Sqrt Time vs. Volume Change Anisotropic (if required): Time vs. Deviator Stress Anisotropic K0 (if required): Time vs. Deviator Stress Stress Path (if required) Time vs. Effective Axial Stress Dynamic Dynamic Data: Log Time vs. Load Input Deviator Stress: Deviator Stess vs. Effective Axial Stress Loading Hysteresis: Sample Height Change vs. Current Load Modulus and Damping: Cyclic Shear Strain vs. Young's Modulus and Damping Coefficient
Standard Tables	Saturation: Raw Data, Calculated Results Consolidation: Isotropic: Raw Data, Calculated Results Anisotropic Engage Data (if selected): Raw Data, Calculated Results Anisotropic Data (if selected): Raw Data, Calculated Results Anisotropic K0 Data (if selected): Raw Data, Calculated Results Stress Path (if required) Raw Data, Calculated Results Dynamic: Raw Data, Calculated Results Modulus and Damping Properties: Raw Data, Calculated Results
Standard Views	Saturation: Measured Data, Calculated Results Consolidation: Measured Data, Calculated Results Stress Path (if required): Measured Data, Calculated Results Dynamic: Measured Data, Calculated Results
Standard Reports	Customised Reports Available on request from VJ Tech
Standard Results	Saturation: Graph: Cell Pressure Input vs. B-Value Table: Cell Pressure, Back Pressure and Pore Water Pressure Inputs and resultant Volume Change and B-Value Isotropic Consolidation: t100 Value, Estimated Stain to Failure, Consolidation, Compressibility Stress Path: Summary Graph: Total Stress vs. Deviator Stress Summary Table:Target Total Stress and Deviator Stress and TotalStress and Deviator Stress Dynamic Views: Modulus and Damping Results: Damping Coefficient, Young's Modulus Strain Results: Cyclic Shear Strain, Poisson's Ratio, Shear Modulus Dynamic Damping Ratio and Shear Modulus Table: Cyclic Shear Strain, Young's Modulus, Damping Coefficient, Shear Modulus Ratio, Selected Cycle