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Facilities / Experimental Techniques



Expertise

LSDG focus on dynamic testing at all ranges of sizes and energies. To perform this type of testing different facilities are available:

Gas guns, round calibers: .Magnum .44, 7.62 - 25 - 60 - 200 - 500 mm

  • Maximum impact velocity 1000 m/s (one stage)-
  • Barrel length: from 2 - 18 m-
  • Impact velocity laser measurement-
  • Special in-house sabot development for debris and special shapes-
  • Material tested: Metals, composites, ceramics

500 mm caliber gas gun

Gas guns, square calibers: 50 - 110 mm

  • Maximum impact velocity 350 m/s (one stage)
  • Barrel length 6 m
  • Impact velocity laser measurement
  • Special in-house sabot development for debris and special shapes
  • Material tested: Metals, composites, ceramics


Drop weight tower: from 5 - 2500 J

(Instron9400)

  • Impact energies from 5 up to 2500 J
  • Maximum height without spring system 1 m
  • Maximum drop weigth: 45 kg
  • Impact velocity laser measurement
  • Climatic chamber for temperature control
  • Special in-house tooling development special coupons
  • Material tested: Metals, composites, ceramics

Split Hopkinson Tensile bar

  • 22 mm diameter steel and aluminium bars
  • Maximum impact velocity 15 m/s
  • Strain rates for 100 to 10000 s<sup>-1</sup>
  • Incident bar of 4200 mm and transmitted bar of 1800 mm, capable to capture pulses up to 0.5 ms of duration
  • High speed data adquisition
  • Special instrumentation for low force range with semiconductor gauges
  • Special tooling for bending, fracture...
  • Material tested: Metals, composites

Split Hopkinson Compression bar

  • 22 mm diameter steel and aluminium bars
  • Maximum impact velocity 15 m/s
  • Strain rates for 100 to 10000 s<sup>-1</sup>
  • Incident bar of 2600 mm and transmitted bar of 1500 mm, capable to capture pulses up to 0.5 ms of duration
  • High speed data adquisition
  • Special instrumentation for low force range with semiconductor gauges
  • Special tooling for bending, fracture...
  • Material tested: Metals, composites


Very high speed Instron machine

(VHS)

  • Load capacity: up to 80kN
  • Capable of velocities: up to 20 m/s in tension
  • Strain rates for 10 to 100 s<sup>-1</sup>
  • Force, displacement and acceleration measurements
  • High speed data acquisition package
  • FastTrack™ VHS8800 controller
  • FastTrack™ High Rate software
  • In-house tooling development for special testing
  • Material tested: Metals, composites

Structural impact testing

Some of our research are related with structural testing under impact. For this reason some special rig and supports need to be designed, engineered and tested:

Our lab and engineer could design and manufacture the required rig for the required task and research.


Quasistatic Coupon testing

As part of the Continuuum Mechanics department of the University Carlos III of Madrid also quasistatic and fatigue machines are available for static characterization in a range from 100 N - 250 kN


High speed cameras

In order to record the dynamic events, LSDG use the state of the art of the high speed cameras:

  • Photron SA-Z up to 2.1 M of fps
  • Photron SA-X up to 200 k fps

Low speed cameras

In order to record the quasistatic events, LSDG use different cameras:


3D Digital Image Correlation (3D DIC)

The state of the art of the Digital Image Correlation 3D VIC software give us access of a ton of data to analyse the structural behaviour during the impact or dynamic testing.


High speed data adquisition system

Accelerometers, strain gauges, cell loads and LVDTs should be recorded at the right moment and at the right rate. The LSDG use more than 13 channels of a Dewetron