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1151
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Understanding tear strength and its importance
Tear strength measures the force a material can withstand before a tear propagates. It covers both the initial rupture and the resistance to further tearing once damage has started.
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Industry applications of flexural testing
Plastics and thermoplastics
Flexural testing reveals the stiffness, yield point, and failure mode of plastics, informing mate
1153
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Coefficient of friction (COF) explained
Understanding the COF formula
The coefficient of friction (μ) is a dimensionless value calculated as:
1154
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Key testing methods
Different materials require different approaches to compressive hardness testing. The most common methods are:
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Puncture and shear testing techniques and equipment
Testing involves applying a force to a clamped specimen until the material fails, with the method determined by the applicable standard.
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Standards for top-load testing
ASTM D2659
Specifies the method for determining the column crush resistance of blown thermoplastic containers.
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ASTM and ISO approaches
ASTM D1938 specifies trouser tear testing for thin plastic films and sheeting, including specimen dimensions, pre-cu
1159
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Testing procedures for electrical connectors
For electrical connectors, insertion and withdrawal testing is essential to ensure reliable contact, mechanical robustness, and compliance with relevant standards.<
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Introduction to compression testing
Compression testing is a core mechanical test method used to evaluate how materials and products behave when subjected to a compressive load.
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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.
1162
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The standard specifies the procedures for measuring the force required for needle penetration and the drag force as the needle travels through a simulated skin or tissue.
1163
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Applications of bulk analysis testing
Industries and products
Bulk testing is relevant to a wide range of industries.
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Case studies
Luer connector testing
A medical device manufacturer needed to verify strip torque for Luer connectors used in IV systems.
1165
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Introduction to tension and compression testing
Tension and compression testing are among the most widely used mechanical testing methods for evaluating how a material or component performs under applied loads.
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Types of peel tests
90° peel test
This method is used for flexible-to-rigid bonds, where the flexible layer is peeled away at a right angle to the substrate. It is common for:
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How is texture testing performed?
Common test types and measurements
Compression tests - assess firmness or hardness by applying a controlled force to compress the sample.
1168
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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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Industry-specific test standards
ISO 9895 - packaging materials
ISO 9895 specifies the method for determining the compressive strength of paper and b
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Why is texture testing important?
Texture testing ensures consistent product performance, supports process control, and validates compliance with industry standards. Even small changes in raw materials, processing conditions, or environmental factors can alter texture.
1171
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Maintenance and calibration of tear testers
To maintain accuracy and extend service life, regular maintenance and calibration are essential.
1172
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Introduction to single rip trouser tear testing
Single rip trouser tear testing is a method used to measure a material’s ability to resist the propagation of a tear once it has started.
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Comparing adhesion test methods
While the peel wheel test maintains a constant 90° angle, other tests such as the 180° peel test are also widely used.
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Types of testing methods
Electromechanical and servohydraulic systems
Two main actuation technologies are used in tension and compression testing: electromechanical systems and servohydraulic systems.
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Methods of compressive burst testing
Inflationary burst testing
In this method, internal pressure is gradually increased using air, gas, or liquid until the container ruptures. This is widely applied to: