Contact Us for Analogue compression testing machine.

Here’s a guide on how to work an Analogue compression testing machine, incorporating mathematics data and images:

1. Components and Setup:

• Key Components:
  • Loading frame (applies compressive force)
  • Load cell (measures applied force)
  • Dial gauge (measures deformation)
  • Specimen platform (holds the specimen)
  • Handwheel or hydraulic pump (controls loading)
  • Autographic recorder (optional, for continuous data recording)

Image of an Analogue Compression Testing Machine:

analogue compression testing machine with labeled components

2. Specimen Preparation:

• Ensure specimen meets required dimensions and standards for the material being tested.
• Measure precise dimensions (length, width, height) using a caliper or micrometer.
• Calculate initial cross-sectional area (A0) using the formula: A0 = length × width (for rectangular specimens).

3. Machine Calibration:

• Verify zero readings on load cell and dial gauge.
• Conduct calibration checks using standard weights or reference blocks, if available.

4. Specimen Placement:

• Position specimen on the platform, ensuring it’s centered and aligned vertically.

5. Loading Application:

• Engage the handwheel or hydraulic pump to apply compressive force gradually.
• Monitor load cell and dial gauge readings throughout the test.

6. Data Collection:

• Record load (P) and deformation (δ) readings at regular intervals (e.g., every 1000 N or 0.05 mm).
• If using an autographic recorder, it will generate a continuous load-deformation curve.

7. Calculations:

• Compressive Stress (σ): σ = P / A0 (force per unit area)
• Compressive Strain (ε): ε = δ / L0 (deformation per unit length)
• Modulus of Elasticity (E): E = σ / ε (material’s stiffness)
• Ultimate Compressive Strength (σu): The maximum stress the specimen can withstand before failure.

8. Graph Generation:

• Plot load-deformation data to create a stress-strain curve, visually representing material behavior.

9. Failure Point:

• Stop loading when specimen fails or reaches a predetermined limit.
• Record the ultimate compressive strength (σu) at failure.

10. Report Generation:

• Document specimen details, test conditions, results, and calculations.
• Include stress-strain curve in the report.

Image of a Stress-Strain Curve

typical stressstrain curve for compression testing

Additional Notes:

• Loading rate can influence results; follow material-specific standards.
• Ensure safety measures are in place, as sudden specimen failure can cause injury.
• Regularly maintain and calibrate the machine for accurate results.

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