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Foam Constant Load Pounding Fatigue Tester

Foam Constant Load Pounding Fatigue Tester

Model: UT4035A, ISO 3385, ASTM D3574 (I3)

UT4035 Foam Constant load Pounding Fatigue Tester / Foam hardness and compressive strength Tester is mainly used for the reciprocating impact compression fatigue test of foam polymeric materials to determine the thickness reduction value and hardness reduction value (residual deformation rate) of the sample, and thus the dynamic fatigue characteristics of the material can be understood.  Also used to determine the indentation hardness of porous elastic materials. It can be used to test polyurethane sponge foam samples according to national standards to accurately measure the indentation hardness of materials such as sponges and foams. It can also be used to measure the specified indentation hardness of manufactured seat foams (such as backrest and seat cushion foams), accurately determining the indentation hardness of each foam component in seats.


Designed according ASTM D3574, I3 Dynamic fatigue test by constant force pounding;

ISO 3385 Flexible cellular polymeric materials - Determination of fatigue by constant-load pounding.

General introduction

UT4035 Foam Constant load Pounding Fatigue Tester / Foam hardness and compressive strength Tester is mainly used for the reciprocating impact compression fatigue test of foam polymeric materials to determine the thickness reduction value and hardness reduction value (residual deformation rate) of the sample, andhttps://www.unitedtest.com/iso-1-4999/iso-3385-soft-foam-impact-fatigue-test-constant-load-pounding.html thus the dynamic fatigue characteristics of the material can be understood.  Also used to determine the indentation hardness of porous elastic materials. It can be used to test polyurethane sponge foam samples according to national standards to accurately measure the indentation hardness of materials such as sponges and foams. It can also be used to measure the specified indentation hardness of manufactured seat foams (such as backrest and seat cushion foams), accurately determining the indentation hardness of each foam component in seats.

Foam Constant Load Pounding Fatigue Tester


Test Principle: 

For the Constant load pounding test: Repeated indentation of a test piece by an indenter smaller in area than the test piece, the maximum load reached during each cycle being kept within specified limits.

In the sponge foam compression stress test, the sample is placed between the upper and lower compression plates. The upper compression plate compresses the sample of a specified size downward at a prescribed speed to the indentation specified by the national standard Method A (Method B, Method C). The load cell on the plate senses the pressure, feeds it back to the controller for processing and display, thereby measuring the indentation hardness of materials such as sponges and foams.

Key Features

  • Features
  • Standard reference
  • Test Principle:

2.1. Automatic Zeroing: After receiving the test start command, the system automatically zeroes.
2.2. Automatic Return: After the specimen breaks, it automatically returns to the initial position.
2.3. Automatic Gear Shifting: Different gears can be switched according to the load to ensure measurement accuracy.
2.4. Changing Speed: The machine can change the test speed arbitrarily according to different specimens.
2.5. Indication Calibration: The system can accurately calibrate the force values.
2.6. Control Methods: Test methods such as test force, test speed, displacement, and strain can be selected according to test requirements.
2.7. Multi-function Machine: Equipped with sensors of different specifications, allowing one machine to perform multiple functions.
2.8. Curve Traversal: After the test, the force and deformation data of each point on the test curve can be analyzed using a mouse.
2.9. Display: Data and test curves are dynamically displayed during the test process.
2.10. Results: Test results can be stored and retrieved, and data curves can be analyzed.
2.11. Limit: Features program-controlled and mechanical limits.
2.12. Overload: Automatically shuts down when the load exceeds the rated value.

ISO 3385 Flexible cellular polymeric materials - Determination of fatigue by constant-load pounding.


ASTM D3574 Standard Test Methods for Flexible Cellular Materials;Slab, Bonded, and Molded Urethane Foams. (I3 Dynamic fatigue test by constant force pounding;)

1, For the Constant load pounding test: Repeated indentation of a test piece by an indenter smaller in area than the test piece, the maximum load reached during each cycle being kept within specified limits.

2, In the sponge foam compression stress test: the sample is placed between the upper and lower compression plates. The upper compression plate compresses the sample of a specified size downward at a prescribed speed to the indentation specified by the national standard Method A (Method B, Method C). The load cell on the plate senses the pressure, feeds it back to the controller for processing and display, thereby measuring the indentation hardness of materials such as sponges and foams.


Main technical specification

ControlTouching screen
Induction wayPrecision load
Capacity2KN
UnitKg, N, LB;
Upper platenDiameter 200mm, bottom corner radius R1mm;
Lower platform420×420mm, ventilation hole diameter 6mm, spacing 20mm
Test speed100±20mm/min
Power sourceServo motor
Max. stroke75 mm
Transmission methodPrecision ball screw
Weight160kg
PowerSingle-phase, 220V, 50Hz/60Hz, 2.5A



Foam Constant Load Pounding Fatigue Tester

The screen of fatigue test operation interface. 

Can set the constant load, test cycles, frequency etc., 

Standard

ISO 3385 Soft foam impact fatigue test by constant-load pounding

ISO 3385: Flexible cellular polymeric materials - Determination of fatigue by constant-load pounding.

ISO 3385 specifies a constant-load pounding fatigue test to evaluate thickness loss and hardness loss of flexible cellular materials (primarily polyurethane and rubber latex foams) used in load-bearing upholstery applications. It simulates long-term cyclic loading to assess material durability and service performance.

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