JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - 52

Technologies & Innovations

NDC

Composite damage detection
using distributed strain sensing
- Composite damage
detection using distributed
strain sensing ................. p52
- A novel tool for
composite beam
computation .................... p54

The RTS150 is an off-the-shelf real-time fibre optic sensing interrogator. With tens of thousands of strain or temperature sensors constantly monitored up to 100 times per
second, it brings sensing technology to an unprecedented
level of performance. 4DSP showcased the technology at
JEC Americas 2013.

E

ngineers are relying more and
more on fibre-reinforced composite materials in modern aerospace,
automotive and civil structures.

Composite failure
Because of the inhomogeneous, layered, and directional nature of these
materials, the modes by which they fail
can be extremely complex and difficult
to model, locate, quantify, and track.
4DSP's distributed strain sensing
technology allows engineers to detect
and pinpoint various types of composite failure - all while avoiding vehicle
downtime and other timely nondestructive methods. A 15-cm-long
cantilevered fibreglass-epoxy composite beam with a central delamination
region was used to demonstrate this
capability.

Reliable measurements
4DSP's interrogation instrument, the
RTS150, outputs continuous strain
profiles along hair-like and virtually
weightless fibre optic cables. One of
these fibres was installed across the
entire span of the composite coupon
to sense the tensile and compressive bending strains along the axial
direction. One end of the beam was

52 jec composites magazine / No85 November - December 2013

fixed and the other left free, creating a
cantilever setup. In this configuration,
an undamaged, elastic beam subjected
to a tip load will exhibit a linear strain
profile. The highest strain will be at the
fixed end, and it will decrease to zero
at the free end.
The two plots show the unloaded and
loaded strain states along the beam's
length. The c begins with zero strains,
as shown by the horizontal line in

More information
- Up to 32 optical fibres
simultaneously monitored
- 2048 equally-spaced sensors
per fibre
- 0.1 cm to 10 cm spatial resolution
- Real-time strain and temperature
measurements through FBG
- Less than 50 ms latency
- Up to 100-Hz refresh rate
- 3D shape sensing
- Resists electromagnetic/radio frequency
interference and radiation, operates in demanding
environments
- Built-in computer with Windows7 and relevant
software tools pre-installed
- Networking
capability as
well as direct
screen, mouse
and keyboard
connections


http://www.jeccomposites.com

JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013

Table of Contents for the Digital Edition of JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013

Cover
Edito
Point of view: bespoke equipment
Contents
Agenda of Events
COMPANY & BUSINESS In Brief
APPLICATIONS
Large parts
Skateboard
Second life
Truck
Pipe
MARKET Process
FEATURE CONSTRUCTION
Roofing
PFRP house
Sandwich panels
GFRP grid
Gelcoat
Windows
Bridge
RESEARCH & DEVELOPMENT
Cure monitoring
Design
TECHNOLOGY & INNOVATIONS
NDC
Simulation
CBeam
Index
In the world
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - Cover
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - 2
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - Edito
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - Point of view: bespoke equipment
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - 5
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - Contents
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - 7
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - Agenda of Events
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - 9
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - COMPANY & BUSINESS In Brief
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - 11
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - Large parts
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - 13
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - Skateboard
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - 15
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - Second life
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - 17
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - Truck
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - 19
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - Pipe
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - 21
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - 22
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - MARKET Process
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - 24
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - 25
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - 26
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - 27
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - Roofing
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - 29
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - 30
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - PFRP house
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - 32
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - Sandwich panels
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - 34
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - 35
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - GFRP grid
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - 37
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - Gelcoat
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - 39
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - Windows
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - 41
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - Bridge
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - 43
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - 44
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - Cure monitoring
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - 46
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - 47
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - Design
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - 49
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - 50
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - 51
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - NDC
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - 53
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - Simulation
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - 55
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - CBeam
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - Index
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - In the world
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - 59
JEC COMPOSITES MAGAZINE - Issue #85 - November/December 2013 - 60
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