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Standards and compliance in shear testing
Adhering to recognised standards ensures consistency and comparability of results. Common examples include:
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Measurement and testing methods
Techniques for measuring tangent modulus
Tangent modulus is measured during tensile or compression testing, w
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Key methods of penetration resistance testing
Penetration resistance measures a material’s ability to resist intrusion by a probe or object under applied force without tearing, cracking, or losing functional integrity.
Applications include:
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Mechanical properties and accuracy considerations
Tensile testing via the strip method reveals mechanical properties that determine how fabrics perform in use.
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Advantages of High Ultimate Tensile Strength
To calculate ultimate tensile strength in practice, a specimen is mounted in a tensile testing machine and stretched at a constant rate until it breaks. The machine measures both force and elongation, recording data throughout the test.
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Equipment and safety precautions
To ensure accurate and safe testing, the following components are required:
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Key methods for compressive strength testing
Several methods are used to determine the compressive strength of materials, and the appropriate test depends on the material and the specific industry requirements.
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How is the trapezoidal tear test performed?
A standard trapezoidal tear test follows a consistent sequence:
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Test method and procedure
In a climbing drum peel test, one end of a bonded specimen is clamped to a rotating drum while the other end is fixed to the crosshead of the test machine.
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Case examples
Catalyst pellet crush strength - A petrochemical manufacturer evaluated catalyst pellets using radial crush testing.
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Step-by-step guide to conducting a CMT test
Prepare the specimen - Cut to size with clean edges, ensuring flutes remain undamaged, and condition as per the standard.
Calibrate the equipment - Check the load cell and platen alignment.
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Standards for flexural testing
Consistency in flexural strength testing is achieved through compliance with recognised standards, which define specimen dimensions, loading rates, and reporting requirements.
Key standards include:
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Torque testing standards
A range of recognised standards define the correct procedures for reverse ratchet torque testing, ensuring consistent and reliable results.
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Methods for lap shear testing
Single lap shear test procedure
In a single lap shear test, two specimens are bonded with an adhesive in an overlapping configuration.
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Equipment and procedures
SCT testing equipment and tools
Accurate SCT testing requires equipment that can apply controlled and repeatable loads:
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Introduction to rotational shear testing
Rotational shear testing is a specialised method used to measure the torque or twisting force required to deform a material or component.
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Introduction to penetration and puncture resistance testing
Penetration and puncture resistance testing are essential for evaluating how well a material can withstand force from sharp, pointed, or blunt objects.
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Relevant textile test standards
The strip method is defined in several national and international standards, each tailored to specific fabric types and performance requirements:
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Case studies and real-world examples
Food sachet packaging
In a recent study, our equipment was used to test the burst strength of multilayer foil sachets used for single-serve food products.
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Types of calculations handled
Mecmesin’s VectorPro software supports a wide range of test calculations, automatically derived from mechanical testing data:
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What is the trapezoidal tear test?
The trapezoidal tear test is a mechanical method used to determine the tear strength of flexible sheet materials.
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Flat crush of corrugated medium (CMT test)
The flat crush test, also known as the Concora Medium Test (CMT), measures the maximum force a corrugated medium can withstand before flute collapse. In CMT testing, the medium is first formed into flutes using a laboratory fluter before testing.
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Understanding reverse ratchet torque
Reverse ratchet torque testing is an essential process for verifying the safety and reliability of child-resistant closures (CRCs).
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Industry-specific test standards
ISO 9895 - packaging materials
ISO 9895 specifies the method for determining the compressive strength of paper and b