New Australian imaging technology set to provide better insight into aircraft stress

November 15, 2021

Australian invention provides real time imagery that helps quantify material stress and detect fatigue cracks

The LTS-640V is a digital imaging machine little bigger than a DSLR camera that provides real time imagery that helps quantify material stress and detect fatigue cracks that could prove dangerous if unchecked.

The LTS-640V is designed to be used during the certification stage before an aircraft is approved for
commercial or military use. The capability it provides will allow for a potentially more streamlined
certification process, and should help eliminate some of the surprises that can occur during testing of
a new aircraft structure.

The technology was developed in collaboration with scientists at the Australian Department of Defence
where a prototype of this technology has helped support sustainment of the F/A-18 Classic Hornet, and
more recently provided Lockheed Martin Aeronautics with valuable new information during structural
certification testing of the F-35 Joint Strike Fighter.

The Australian invention is the first of its kind, providing real time fusion of stress and visible spectrum
imaging – in effect merging the visible with the invisible.

“This inspection approach is based on the ‘thermoelastic effect’; put simply, when you squash something
it heats up, when you stretch something it cools down,” said a spokesperson for the Department of

“Think of magic spray which is often used to treat sports injuries – it’s the stretching or expansion of
the gas as it leaves the aerosol can that provides the cooling effect.

“Unlike magic spray however, the temperature changes we’re dealing with are tiny, thousandths of a
degree, but we can still detect them, and quite easily using the advanced algorithms at the core of this
technology,” they said.

This capability has a significant role to play in helping aircraft designers and operators better understand
how an airframe performs under load.

“The technology can improve our ability to quantify stresses, particularly in structurally critical areas
where traditional technologies have very limited capability,” the spokesperson said.

With $275,000 of grant funding, the design team at 1MILLIKELVIN have transformed this groundbreaking
capability into a robust commercial product.

“We are looking to help streamline and improve structural validation processes across the global defence
and aeronautics industries’, says Mr Kheang Khauv, Managing Director of 1 MILLIKELVIN, manufacturer
of the LTS-640V technology.

“This technology has been used to support the Classic Hornet and has demonstrated in the F-35 full
scale durability test program how it can improve the way designers validate modelling of complex
airframe components.

“We are proud our advanced technology is making a contribution to Defence capability,” he said.
Potential applications of the technology extend well beyond aviation, with potential customers including
a wide range of industries both in Australia and around the world.

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