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Tensile deformation and its significance
Tensile deformation occurs when a material is stretched by an axial load, causing it to elongate.
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What is yield point?
The yield point is the point on a stress-strain curve where a material begins to deform plastically. Before this point, deformation is elastic and reversible. Beyond it, the material undergoes permanent change.
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Comparison with other peel tests
A 90° peel test is often used for flexible packaging films.
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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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Why is top-load testing important?
Top-load testing plays a critical role in packaging design, quality assurance and compliance. It helps to:
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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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Pharmaceuticals
The pharmaceutical industry is tightly controlled and subject to strict regulations, which means that testing is often at the heart of demonstrating compliance to the various international standards which govern the industry.
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Types of compressive shear tests
Test configurations vary according to the material, application, and relevant industry standard.
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Applications in industry
The Delft tear test is used wherever rubber and thermoplastics need to maintain performance under stress. Common uses include:
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Introduction to five-point bend testing
The five-point bend test is a specialised method for assessing the mechanical performance of structural panels, particularly their resistance to planar shear forces.
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Applications in industrial settings
Insertion and withdrawal testing is not limited to electrical connectors. It is used to validate the performance of:
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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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Introduction to loop tack testing
Loop tack testing is a specialist method used to evaluate the initial tack, or quick stick, of pressure-sensitive adhesives (PSAs).
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Introduction to tear testing
Tear testing is a quality control procedure used to measure the resistance of a material to tearing under controlled conditions.
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Applications across industry
The single rip trouser tear method is used in:
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Applications in advanced ceramics and composites
Four-point bend testing is the preferred approach for assessing the flexural strength of advanced ceramics<
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Applications in industry
Engineering and manufacturing uses
Tangent modulus testing supports design validation and process control in sectors where materials operate near or beyond the elastic range, for example:
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Introduction to yield point testing
Yield point testing is essential for understanding the mechanical behaviour of materials.
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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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Applications in industry
Construction materials
Cleavage strength testing is used to verify the integrity of structural materials such as laminated timber beams, bonded façade panels, and composite structures.
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What is top-load testing?
Top-load testing, also known as column crush testing, is a method used to evaluate the ability of a packaging component to withstand a vertical compressive force without deforming or failing.
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Introduction to compressive shear testing
Compressive shear testing is a mechanical test method used to measure a material’s ability to resist shear forces while under compressive load.
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What is extrusion testing?
Extrusion testing involves forcing a food sample through a shaped orifice, grid, or opening while measuring the resistance to movement.