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When human life depends upon structural integrity as an essential design requirement, it takes ten thousand material test coupons per composite laminate configuration to evaluate an airframe plus loading to ultimate failure tails, wing boxes and fuselages to achieve a commercial aircraft airworthiness certification.
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For each bacterium and material tested, four coupons were placed in a sterile eppendorf containing 1 mL of NaCl 0.9% and vortexed vigorously for 2 minutes.
In order to speed up the measurement of the erosion scars, a system is required that can measure the shape and depth of scars on test coupons of materials without the need to remove them from the HTSPE system to perform the measurement.
The material was delivered in the form of test coupons with dimensions 400 × 150 × 2mm.
Tensile test coupons cut from the flange and web plates of the section segments were tested to determine the material properties required for the numerical modelling of the beams with web openings.
For all of the test specimens, only four tensile coupons, i.e. two from the flange plate and two from the web plate, were cut out for the material test, as all test specimens made from the same section.
Test coupons of such markers have been manufactured and examined.
Two common material test methods have been used to obtain the hoop strength and rupture strain of FRP composites used in these applications: tensile tests of flat coupons and split-disk tests.
Gravimetric experiments were conducted on test coupons of dimension 3 × 3 × 0.14 cm.
Gravimetric experiments were conducted on test coupons of dimension 3 cm × 3 cm × 0.14 cm.
Elevated temperature material tests on cold-formed steel coupons cut from circular, rectangular and square hollow sections have been conducted, including both steady-state and transient-state tests.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com