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Standards and specifications
Fastening torque testing is governed by international and sector-specific standards to ensure consistency and repeatability:
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Equipment and tools used in testing
Accurate elongation and recovery testing requires tensile testing machines capable of precise load application and displacement measurement. Important features include:
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What is four-point bend testing?
Four-point bend testing determines a material’s flexural strength and stiffness by applying force at two points between two supports.
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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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FAQs about compressive strength testing
How is compressive strength different from tensile strength?
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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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What is the 135° peel test?
The 135° peel test is a method for measuring the seal strength of semi-rigid packaging, typically where a flexible lid is sealed onto a rigid or vacuum-formed container.
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Speak to an expert
If you require guidance on puncture resistance testing methods or selecting equipment that meets ASTM or ISO standards, speak to one of our technica
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Speak to an expert
Tensile testing and elongation at break measurement are essential for material performance evaluation, product development, and quality assurance.
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Introduction
ISO 11040-4 Annex F outlines the standardized method for testing the mechanical properties of pre-filled syringes, specifically focusing on needle penetration and drag.
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Interpreting test results
Peel strength is typically reported in newtons per metre (N/m) or per 25 mm of bond width (N/25mm), depending on the industry standard. From the force-displacement graph, the following characteristics are analysed:
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Understanding and interpreting test results
Box crush testing provides clear, measurable data to inform design and compliance decisions:
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Modulus of elasticity formula
Young’s modulus (E) is calculated from the linear portion of a stress-strain curve using this formula:
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Introduction to tensile strength
Tensile strength is a fundamental mechanical property that defines a material’s ability to resist forces that attempt to pull it apart. It represents the maximum tensile stress a material can withstand before failure.
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Standards for the peel wheel test
Standardisation ensures peel wheel tests are consistent and repeatable across laboratories and production sites.
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Speak to an expert
Selecting the right approach to secant modulus testing depends on the material, applicable standards, and the intended use of the results.
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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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Measurement and testing methods
Techniques for measuring tangent modulus
Tangent modulus is measured during tensile or compression testing, w
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Yield point testing methods
Yield point testing is most often performed using tensile testing, in which a specimen is subjected to a steadily increasing axial load until plastic deformation occurs.
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Methods and applications
Common test methods
Most single lap shear tests are carried out under tensile loading, but the method can vary depending on material type, bond configuration and industry require
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What is fastening torque
Fastening torque refers to the rotational force applied to tighten a fastener, typically measured in Newton-metres (N·m) or pound-force inches (lbf·in). The correct torque value ensures adequate clamping without overstressing components.
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Differences and similarities to other corrugated tests
While TAPPI T 824 focuses on the intrinsic crush strength of pre-fluted medium, other common corrugated tests measure different performance factors:
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Mecmesin equipment for tension and compression testing
Mecmesin offers a range of systems for static and cyclic testing, including:
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How to conduct a grab test
A standard grab test involves the following steps: