Search results
276
[Page extract]
Introduction to T-peel testing
T-peel testing is a specialised method for determining the adhesive bond strength between two flexible materials joined together.
277
[Page extract]
Step-by-step procedure for reverse ratchet torque testing
Sample preparation
Condition the closures according to the specified standard to control environmental factors.
278
[Page extract]
Measurement and testing methods
Techniques for measuring tangent modulus
Tangent modulus is measured during tensile or compression testing, w
279
[Page extract]
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:
280
[Page extract]
Methods of testing tensile strength
The most common method is the uniaxial tensile test.
281
[Page extract]
Understanding test standards: industry-specific requirements
To maintain consistency and reliability, compressive strength tests are often governed by established standards.
282
[Page extract]
Standards for trapezoidal tear testing
Several international standards define this method, specifying specimen dimensions, slit length, and test speed. The most widely used include:
284
[Page extract]
Understanding cone penetration testing
Cone penetration testing is a precision method used to determine a material's resistance to penetration by a standardised cone-shaped probe under specific force conditions.
285
[Page extract]
Step-by-step test methodology
Preparation
Sample selection - Choose representative specimens, avoiding faults unless deliberately testing them.
Specimen cutting - Cut to standard dimensions with a central slit of specified
286
[Page extract]
Standards and compliance in shear testing
Adhering to recognised standards ensures consistency and comparability of results. Common examples include:
287
[Page extract]
Torque testing standards
A range of recognised standards define the correct procedures for reverse ratchet torque testing, ensuring consistent and reliable results.
288
[Page extract]
Equipment and procedures
SCT testing equipment and tools
Accurate SCT testing requires equipment that can apply controlled and repeatable loads:
289
[Page extract]
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.
290
[Page extract]
Mechanical properties and accuracy considerations
Tensile testing via the strip method reveals mechanical properties that determine how fabrics perform in use.
291
[Page extract]
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.
292
[Page extract]
Equipment and safety precautions
To ensure accurate and safe testing, the following components are required:
293
[Page extract]
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.
294
[Page extract]
How is the trapezoidal tear test performed?
A standard trapezoidal tear test follows a consistent sequence:
295
[Page extract]
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.
296
[Page extract]
Case examples
Catalyst pellet crush strength - A petrochemical manufacturer evaluated catalyst pellets using radial crush testing.
297
[Page extract]
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.
298
[Page extract]
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:
299
[Page extract]
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.
300
[Page extract]
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.