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1301
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Coefficient of friction (COF) explained
Understanding the COF formula
The coefficient of friction (μ) is a dimensionless value calculated as:
1302
Case study
Adhesive test on capsulated stoppers
Requirement
A capsulated stopper (T-top, Bar-Top or Altop®) is a natural or synthetic cork stopper where the end is glued into a cap of wood, PVC, porcelain, metal, glass or other material.
1303
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ISO 4049
This document specifies requirements for dental polymer-based restorative materials supplied in a form suitable for mechanical mixing, hand-mixing, or intra-oral and extra-oral external energy activation, and intended for use primarily for the direct or
1304
[Page extract]
Industry-specific testing solutions
Strain at maximum stress testing is relevant wherever materials are expected to endure high loads without unacceptable deformation.
1305
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Students meet the Mecmesin MultiTest
Having spent time with the Mecmesin team and seen their material testers in action, WPI opted to invest in three Mecmesin MultiTest 2.5-dV testers.
1306
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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.
1307
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How to conduct a Concora crush test
Step-by-step procedure
Specimen preparation - Cut medium to the required size, typically 152.4 mm by 25.4 mm strips, ensuring clean edges.
1308
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What is Young’s modulus?
Young’s modulus - also known as the modulus of elasticity or elastic modulus - defines how stiff a material is when a force is applied.
1309
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Real-time data analysis and reporting
Mecmesin’s software platform offers live monitoring and evaluation of test performance:
1310
[Page extract]
Measurement and testing methods
Techniques for measuring tangent modulus
Tangent modulus is measured during tensile or compression testing, w
1311
[Page extract]
ISO 34-2 standards explained
ISO 34-2 specifies the Delft tear test procedure for vulcanised or thermoplastic rubber, ensuring testing is carried out under consisten
1312
Case study
Cosmetics tin label peel
Customised engineering example
Testing the adhesive peel strength of packaging labels applied at the post-production stage is more representative of their performance than at the label production stage.
1313
Event
Tensile Testing for Wiring Harness Connections
The only way of really knowing the strength of a crimped terminal is to pull it. This can reveal production problems, where strand nicks, incorrect crimp height, or effects from changes in terminal supply, may not be clearly apparent.
1314
Case study
Cardboard beverage bottle carrier unfolding
Customised engineering example
A manufacturer of fully-enclosed cartons wanted to quality test the fold-out force for a variety of their designs, used mainly to package drinks bottles and cans.
1315
Page
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1316
[Page extract]
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.
1317
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ASTM F2458-05
This test method covers a means for comparison of wound closure strength of tissue adhesives used to help secure the apposition of soft tissue.
1318
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ASTM D1578
Significance and Use
Test Method D1578 for testing any spun yarn for breaking strength is considered satisfactory for acceptance testing of commercial shipments since the method has been used extensively in the trade.
1319
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ASTM D2062
The method(s) in the standard along with those in Test Methods D 2051, D 2052, D 2053, D 2054, D 2057, D 2058, D 2059, D 2060, and D 2061 are a collection of proven test methods.
1320
[Page extract]
Magnets and solenoids
Solenoids, a type of electromagnet generating a uniform magnetic field when an electric current is passed through it, have applications in many different types of industries.
1321
Event
Fundamentals of Adhesion (Peel) Testing
There is a reason people reach for Duct Tape as a fix for almost everything – Adhesion Strength. From busted pipes to ripped furniture, the preference for a solution that “does not easily peel off” is the guiding principle for manufactures.
1322
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Tension testing process
Tension testing is the most common method for evaluating tensile deformation and produces quantitative data on how materials behave under controlled pulling forces.
1323
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The 3-Point Bend test goes to Summer School
Both Dr. Cote and Grubbs agree that one of the highlights of their year is the Materials Science summer course for high school students, where they had students design their own candy composites.
1324
[Page extract]
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.
1325
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Introduction to elongation and recovery testing
In industries working with textiles, rubber, elastomers, and flexible plastics, these properties are directly linked to product reli