Page 12 - Automotive Aerospace

Both Safety and Comfort

Some flights last many hours. Good aircraft design is essential to Since openings such as doors and windows in the outer cladding
provide a safe environment for both passengers and crew. reduce the structural strength of the aircraft, they should be kept to a
Thermal insulation material such as glass wool is used in the so-called minimum and made as small as possible. However, they are
insulation blanket between the outer surface and interior lining of the indispensable to prevent passengers from feeling claustrophobic or
aircraft fuselage. It insulates the interior against the outer temperature oppressed. Thorough strength testing and fatigue and endurance
and absorbs noise. It can protect the occupants from temperatures of testing of materials are performed to maintain passenger comfort in
several tens of degrees below zero at an altitude of 10,000 meters. the aircraft and ensure safety.

Compression Testing of Foam Plastics
Due to their lightness, foam plastics are used in a variety of applications,
including as thermal insulation, sound insulation, and cushioning material. High-ratio foam
Low-ratio foam
Medium-ratio foam
The graph on the right shows the results of compression testing on three
types of foam plastic, each with a different foaming agent content. The
low-foam plastic exhibits significantly higher compressive stress than the Stress (MPa)
other two types. It is apparent that the stress did not increase significantly
above about 3 % strain for any of the samples.
Strain (%)
tin
Strain Graph from Compression Testing
Tes
Com
on
ress
Stress – Strain Graph from Compression Testing
ssi
pre
Cohesive fracture Interfacial debonding
— TRViewX Video Type Non-Contact Extensometer —
Applications of Measured Values for Actual Samples to CAE Analysis
With surface Without surface
The Shimadzu TRViewX Video Type Non-Contact Extensometer offers
treatment treatment
world-leading performance. It offers ASTM E83 Class B2 (Class C in
thermostatic bath) elongation measurement accuracy and ASTM E83 Class
C amplitude measurement accuracy performance. It supports measurement
of composite materials, resin films, metal foils, and other materials which
are difficult to measure with a conventional contact displacement gauge.
In addition, it can record the sample status during testing or play back the
video in synchronization with the S-S curve.
e N
p Non-Contact Extensometer
p
TRViewX Video Type Non-Contact Extensometer
TRViewX Video Typ
o
Endurance Testing of Synthetic Yarn
The performance of synthetic fibers has improved dramatically. Lighter, tougher, and stronger, they have a
significant effect on the development of new materials in the aerospace field. The tensile testing and
repeated load testing of synthetic yarns are indispensable for the development of synthetic fibers.
Polyester yarn was subjected to one million load cycles of a 2.14 N ±0.54 N, 10 Hz sinusoidal load. The results
indicate a progressive degradation with a gradual increase in maximum/minimum elongation from 5.34/4.86
mm at the start to 7.58/7.26 mm at the end.
Maximum/minimum elongation (mm)

Repeated cycles
Repeated Cycles – Elongation Curve Polyethylene Yarn Held in Grips for Yarn
Polyethylene Yarn Held in Grips for Yarn

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