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What is lap shear testing under compression?
Lap shear testing under compressive load is a mechanical test used to determine the strength of adhesive joints subjected to shear forces while under compressive stress.
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Why is the trapezoidal tear test important?
Tear resistance is a critical measure of a material’s durability, particularly in applications where the material may be subject to punctures, cuts, or repeated stress.
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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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Burst testing techniques and equipment
Compressive burst testing
In compressive burst testing, force is applied through a hemispherical probe until the material ruptures.
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Applications and benefits
Industrial applications
Tension and compression testing is used across multiple industries to validate design performance, assure quality, and meet regulatory requirements:
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Corrugated medium testing, and particularly the flat crush test under TAPPI T 809, is essential for ensuring packaging strength, reliability, and compliance.
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Puncture resistance testing methods
Puncture resistance measures the ability of a material to withstand an actual perforation event, simulating damage from sharp or pointed objects.
Applications include:
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Loop tack test procedure
Sample preparation
Cut adhesive strips to the required length and width stated in the chosen standard. Condition the samples at the specified temperature and humidity before testing.
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Tensile testing and elongation at break measurement are essential for material performance evaluation, product development, and quality assurance.
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Equibiaxial flexure compression testing via the concentric ring method is a powerful tool for evaluating material strength under realistic, multi-directional stresses.
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Why is torque to turn testing important?
Torque to turn testing plays a critical role in evaluating the performance, reliability and quality of rotating components.
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What is texture testing?
Texture testing is the instrumental measurement of a product’s physical response to an applied force.
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Introduction to tension methods
Tension methods are a core approach in texture analysis, used to measure how a material behaves when subjected to a pulling force until it deforms or fails.
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Industry applications
Automotive industry
Seat cushions - Testing confirms comfort, resilience, and long-term shape retention
Gaskets - Ensures seals remai
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Key methods in shear stress measurement
There are several approaches to measuring shear stress, with rotational shear testing and torsion-based techniques among the most widely used.
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Interpreting results and ensuring accuracy
Accurate results rely on correct setup and consistent procedures:
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Share and analyse data
All test data can be automatically exported in a format of your choice, from text files and tabulated formats, to Microsoft Excel and email. Data can be exported directly through RS-232 for data-analysis packages.
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Case studies
Medical gloves - Manufacturers test to ASTM D412-16 to ensure gloves stretch over the hand without tearing and recover enough for a secure fit.
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Evaluating mechanical properties
Flexural tests yield valuable data on strength, stiffness, and toughness. By examining stress-strain curves from flexural tests, engineers can assess:
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Understanding peel resistance
Peel resistance is the force required to separate two bonded surfaces through a peeling motion. This force is measured using a tensile test system equipped with a peel fixture.
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Industry applications and case examples
Heavy industrial packaging - A manufacturer supplying boxes for machine components integrated routine CMT testing to track performance trends.
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What is peel testing
A peel test measures the force needed to separate two bonded materials, usually by applying force at a set angle until the adhesive bond fails.
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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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Benefits of standardised Delft tear testing
Consistency - Eliminates variation in testing methods for reliable comparisons.
Quality assurance - Demonstrates compliance with industry regulations and specifications.
R&D effici
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Tensile and compression testing are essential for understanding material behaviour and ensuring that components perform safely and reliably in their intended environment.