Large Hydraulic Four Point Bending Machine
Large Hydraulic Four Point Bending Machine
Large Hydraulic Four Point Bending Machine
- Description:
Large Hydraulic Four Point Bending Machine
- Model:
CRT-LH4PT-BB
- Manufacturer:
Cooper
Product Information
  • Description
  • Standard
  • Feature
  • Specification
  • Configuration
  • Accessories
Description

四点弯曲试验机

Machine on the market to accept variable beam lengths

Bending tests are widely used for measuring the stiffness modulus and assessing the fatigue resistance of asphaltic paving materials. The Large     Hydraulic Four Point Bending Beam Machine uses advanced servo-hydraulic technology and a high-speed digital data acquisition and control system together with user-friendly software. During testing both graphical and tabular data are displayed on screen and test data is stored to disc in Microsoft Excel™ compatible format. The test frame is housed in a Temperature Controlled Cabinet with fan-assisted air circulation and a temperature range of -20 to 30°C. The unique constant torque clamping and three-transducer deflection measurement system of the The Large Hydraulic Four Point Bending Beam Machine can be configured to accept different beam sizes. This means that the ratio between beam dimensions and aggregate size of test specimens will satisfy the requirements of the relevant European specifications.


Key Uses

• Mix design

• End product specification

• Assessment of new materials


Software

• User friendly, intuitive and reliable Windows software  developed  using  LabVIEW

• The user interface can be translated into the user’s preferred language – please enquire

• One software package performs both fatigue and complex modulus testing

• Stored test data can be analyzed and compared with other test data utilizing a spreadsheet package

• Utilities are included for curve fitting of acquired data; testing of system’s inputs and outputs; phase correction and a transducer database for storing calibration factors

Standard

• EN 12697-24 Annex D

• EN 12697-26 Annex B

• ASTM-D7460

• AASHTO T321

Feature

• Performs tests according to EN 12697-24 Annex D, EN 12697-26 Annex B, ASTM D7460 and AASHTO T321

• Software allows the user to build and modify test routines for research-level testing

• Frequency range 0.1 to 60Hz

• High-quality servo-hydraulic four-point bending machine

• Double acting fatigue rated hydraulic actuator with integral stroke transducer

• Star servo valve with‘Sapphire Technology’

• Can be used with simple one or research level three LVDT transducers

• Accepts various beam sizes: 380 to 660mm in length and 50 x 50mm to 100 x 100mm cross-section

• Covered for noise reduction

• Sinusoidal controlled strain or controlled stress fatigue test modes

• User defined wave shapes can be used to simulate different types of vehicles

• Software allows the user to run EN, ASTM and AASHTO analysis concurrently

• Multi stage and multi frequency sequences for Master Curves

• Relaxation periods can be programmed – for the investigation of healing

• Camera can be triggered by software for crack initiation and propagation analysis 

• Save full-wave data for any or every cycle for hysteresis analysis

• Constant torque motorized specimen clamping to eliminate errors due to localized beam indentation

• Supplied with a certificate of calibration

• Manufactured in the United Kingdom

• We (Cooper) are the manufacturers of Large Hydraulic Four Point Testing machines in the world

Specification
DescriptionTechnical Specification
Force Transducer±10 kN
Specimen Transducer Range

3 x ±1 mm

Actuator stroke

10mm

Frequency

0.1 to 60 Hz

Temperature (Integral Cabinet)

-20 to 30°C

Electrical Supply¹ 3 Phase 415 Volts 50 Hz @ 16A
Compressed Air

710 bar @ 100 L/min (optional integral extra)

Dimension

1050 x 1600 x 2100 mm (W x D x H)

Working space required2050 x 2600 x 2300 mm (W x D x H)
Weight

approx 1200Kg

PC

Included

¹ others available upon

Technical specifications are subject to change without notice.

Configuration
Accessories/Spare Parts

Accessories

• CRT-PVC-BEAMLARGE PVC Dummy Specimen 100x100mm

• CRT-LH4PT-COMPAIR Integrated Compressed Air Option

Accessories are not included in the price of main device (unless stated otherwise) and may be purchased separately if required.