BWS MMT2 Pure Bending Beam Experiment Bench

In bridges, building structures and other engineering projects, pure bending deformation is very common. With the help of this experiment bench, strain and deflection is measured to analyze the basic properties of structures and materials.


In bridges, building structures, and other engineering projects, pure bending deformation is very common. In this experiment, strain and deflection are measured to analyze the basic properties of structures and materials. If the equipment is slightly modified, you can perform the experiment of bar stability, concentric tension and compression, eccentric tension and compression, and so on. The experiment enables students to learn the dialectical relationship between theory and practice but also enhances their practical abilities.

System Composition and Principle

This product is designed with an enclosed steel frame and cast composition with careful surface treatment. It is a durable fastening structure. For each type of experiment, the product comes equipped with specimen and surface treated samples and accessories. The system consists of Base, Pure Bending Beam, Sensor, Strain Instrument, Strain-Gauge, wires, and so on. The strain instrument can connect to a computer and the data can be processed with our software.
The basic principle of this strain-stress measurement method: measuring a specimen’s surface strain with a strain gauge, then the specimen’s surface stress is determined according to the strain-stress relationship. The strain-stress measurement method is not only used to validate the basic theory of mechanics of materials, to measure the mechanical properties of materials but also is a major engineering testing means for solving engineering problems. It provides a good experimental basis for scientific research.

Contents of Experiments:

1) Normal stress regularity distribution in cross-sections of pure bending beams
2) Strain gauge sensitivity coefficient calibration
3) Elastic modulus and Poisson’s ratio determination
4) Eccentric tension determination
5) Bar stability Test


Experimental device
  1. Experiment Bench
Dimension: 700×450×1015mm
Loading speed: 0.12mm/r
Maximum loading displacement: 50mm
Overload capacity: 150%
Weight: 45kg
 2. Three-point Deflectometer:
Dial Indicator
Measuring range: 0~10mm
Resolution: 0.01mm
Support Span: 200mm

  3. Tensile Specimen
Maximum loading: 5000N
Dimension: 170×30×5mm
modulus: E=190~210GPa
Poisson’s ratio: µ=0.26~0.33
Diagram of the Tensile Specimen




  4. Force Sensor
Model: KMC-3C/1000
Measuring range: 1000kg
Rated Output: 2.3±0.025mV/V
Nonlinearity: ±0.03%FS
Input Resistance: 385±10Ω
Output Resistance: 350±3Ω
Excitation Voltage: 10VDC
Screw thread: M16×1.5mm
Depth of the screw thread: 20mm
Temperature Range: -20°C to +60°C
Materials: Alloy Steel, Stainless SteelDiagram of the force sensor
  5. Pure Bending Beam
Dimension: 700×20×40mm
Maximum loading: 5000N
Elastic modulus: E=190~210GPa
  6. Calibration Beams
Dimension(mm): 700×15×40
Maximum loading: 1500N
Elastic modulus: E=190~210GPa
Poisson’s ratio: µ=0.26~0.33
  7. Components of the System
Beam, Support feet, Hand Wheel, Box, Worm Lifting Devices, Sensor, Rod, Indenter, Bearing Beam, Base, Castor, Support, Strain Instrument.