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676
Event
Fundamentals of Torque Testing
If you have ever struggled to open your favorite bottle of water or jam or required help loosening the lug nuts on your car’s wheels, it is likely due to a case of over-torque.
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BS EN 12562
Synthetic fibres, Polyamide fibres, Aramide fibres, Textile products, Textile testing, Yarn, Filament yarns, Filaments, Filament (textile fibre), Yarn testing, Yarn linear density determination, Elongation at fracture, Elongation, Force measurement, Mec
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Compressive shear
Compressive shear testing is simply the pushing apart of a material specimen by applying compressive force from opposite sides in a parallel plane. In this way, the material is stressed in a sliding motion.
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Friction
'Dry' friction (as opposed to 'fluid' or 'lubricated' friction) is the force resisting lateral motion between two solid surfaces in contact.
It divides into:
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double lap shear
Lap shear testing is used where an adhesive bond joins flat surfaces.
The required surfaces may be profiled, single, double or multiple, but standard test methods focus on a single joint.
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Flexure
Flexural or bend testing is used It is a way of determining how something will react when it is put under opposing forces across a span.to evaluate both the ductility and soundness of a material.
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Insertion and withdrawal
Insertion and withdrawal testing involves applying and measuring the compressive force to an object to push it into a recepticle, then measuring the tension force to pull it out. This may be done for a single cycle or over multiple cycles.
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single lap shear
Lap shear testing is used where an adhesive bond joins flat surfaces. The required surfaces may be profiled, single, double or multiple, but standard test methods focus on a single joint.
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Closure torque
Closures and caps must be applied tight enough to maintain a seal and to resist working loose, but they must not be applied so tightly that the end user cannot reasonably remove them.
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Paper & Board
Paper and board are used in a wide range of applications and, as such, they undergo various stages of processing which place significant demands on their material strength.
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BS EN 28510-1
Test for measuring resistance to peeling at a nominal 90°, particularly suitable for adherends that are insufficiently flexible for a 180° peel test.
687
Case study
Syringe plunger breakaway and glide force
Customised engineering example
The majority of syringes are single-use, disposable and manually-operated.
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Springs
Springs are elastic objects used to store mechanical energy and they change shape in response to external forces, returning to their original shapes when the forces are removed.
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BS EN 863
Protective clothing, Clothing, Perforating tests, Penetration tests, Mechanical testing, Tensile testing, Test equipment, Specimen preparation, Performance testing
691
Case study
Bulk liquid carrier closures
Customised engineering example
Our client manufactures liquid bulk carriers fitted with two-part plastic valve closures. The collar is welded to a plastic bag, and the valve closure is fixed onto it by a compression joint.
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BS EN 5057
Specifies requirements for dimensions, performance characteristics and test programme. section 16 is insertion & withdrawal force test
694
Case study
Medical sharps bin puncture resistance
Customised engineering example
International standards (ASTM F2132, BS 7320, BS 23907) specify the puncture resistance of medical sharps containers.
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ASTM E9-09
These test methods cover the apparatus, specimens, and procedure for axial-load compression testing of metallic materials at room temperature.
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BS EN ISO 11857
Textile floor coverings, Floor coverings, Sheet flooring, Mechanical testing, Textile testing, Textiles, Tensile testing, Test equipment, Test specimens, Testing conditions.
698
Case study
Catheter cap removal torque
Customised engineering example
Our client was testing the release torque of 20 mm long plastic catheter caps with irregular features to aid finger gripping.
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ASTM D5034-09
This test method covers the grab and modified grab test procedures for determining the breaking strength and elongation of most textile fabrics. Provisions are made for wet testing.