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Bender Elements

Stand-alone configuration complete with master signal conditioning control unit and PC software Standalone configuration complete with PC and dedicated software
Stand-alone configuration complete with master signal conditioning
Encapsulated bender elements

Main Features

Bender elements allow you to measure the maximum shear modulus (Gmax) of soil samples in order to evaluate their stiffness. Gmax (typically with shear strain levels of about 0.001%) is a key parameter in low-strain dynamic analysis used to predict soil behavior or soil structure interaction during earthquakes, explosion or machine and traffic vibrations.
 
The Bender Elements connect directly to the compact and easy-to-install smart unit comprising a signal generator and oscilloscope. Advanced user-friendly software then automates the analysis using a range of algorithms.
 
  • HIGH PERFORMANCE: Determining S & P wave velocities enables more specimen parameters to be determined. High speed data acquisition of up to 15 Mega samples/second sample interval provides the resolution necessary for determining wave speeds. 
  • COMPACT AND EASY-TO-INSTALL: This all-in-one turn-key system makes bender element testing easy and reliable. It conveniently includes all the necessary tools such as:
    • Wave generator
    • Oscilloscope
    • PC software
    • Bender Element transmitter and receiver. 
  • ROBUST DESIGN: The length of the bender element inserted into the soil sample is optimized to avoid compromising the power transmitted or received by the elements. This improves resistance to breakage and makes sample preparation easier, particularly on very stiff samples where only a small recess for the element is required. 
  • USER-FRIENDLY GRAPHIC USER INFERFACE (GUI): The intuitive software will guide the user in automating bender element tests and quickly producing realistic estimates of shear wave travel time using a range of algorithms (Time Difference, Cross Correlation and Phase Angle). This provides maximum flexibility for waves travel interpretation in the absence of international standard methods. 
  • VERSATILE The system can be either added as an option to Banded Triaxial cells (upgraded with suitable kits including pedestal, top cap and porous stone); used standalone with optional accessories or as an upgrade to other manufacturers’ systems.

  • tecnical specifications
    • Scroll the table
      • Max working pressure: 3500 kPa
      • Data acquisition speed: up to 15 Mega samples/second
      • Gain range for data acquisition: x5 to x1000
      • Resolution of data acquisition (bits): 10
      • Multi-frequency test: up to 100 kHz
      • Multi wave generator (sine, haversine, morlet)
      • Suitable for specimen with diameters ranging from 50 to 150mm (standard option only) 
  • ordering info
    • 28-WF4200
      Bender element – Master signal conditioning control Unit. 230 V,50 Hz or 110 V, 60 Hz.
      It allows amplification of source and received signals with user-controlled hardware gain levels.
      Features:
      • Capable of generating and receiving P and S waves
      • Max working pressure: 3500 kPa
      • Data acquisition speed: up to 15 Mega samples /second
      • Gain range for data acquisition: x5 to x1000
      • Resolution of data acquisition (bits): 10
      • Multi-frequency test: up to 100 kHz
      • Multi wave generator (sine, haversine, morlet)
      It includes software to control data acquisition and driving signal generation for P wave and S wave velocity tests.
       
      Bender elements kit (Pedestal and top cap with encapsulated bender element)
       
          Only Compression* Compression/extension**
      WF4070
      +
      WF4070/ADV
      50 28-WF4057/PS 28-WF4058/PS
      70 28-WF4077/PS 28-WF4078/PS
      WF4100
      +
      WF4100/ADV
      70 28-WF4077/PS1 28-WF4078/PS1
      100 28-WF4107/PS 28-WF4108/PS
      WF4150
      +
      WF4150/ADV
      150 28-WF4157/PS 28-WF4158/PS

      * Includes: pedestal, top cap with encapsulated piezoceramic elements and two ring sintered porous stones.
      ** Includes: pedestal, vacuum top cap with encapsulated piezoceramic elements and two ring sintered porous stones.
       
      NOTE: for the encapsulated Bender Element only or standalone standing solution, please contact us for additional information.
       

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