FTT Inc. offers structural testing for design validation and failure analysis at our in-house test center. We test specimens, components, or assemblies depending on customer requirements and/or hardware availability. We provide static and dynamic tests under combined loading and we offer full instrumentation capabilities to measure temperature, pressure, stress/strain, or deflection under any type of testing. Data acquisition, recording, and analysis are performed using LabVIEW or National Instruments systems. In addition, we design and fabricate custom test fixtures for individual applications.

Our Structural Test Services Include:

Stress Pattern Analysis by Thermal Emission (SPATE): (back to top)

SPATE can identify high-stress regions of a component and characterize the behavior of materials and structures under stressed conditions.

  • Full-field non-contact imaging system.
  • Laser light illuminates component undergoing low-amplitude vibratory excitation.
  • Camera records real-time images of variations in thermoelasticity to a resolution of 0.001 degrees Celsius.
  • Generates temperature map that correlates stress and dynamic loading.

Modal Analysis Impact Testing: (back to top)

Modal analysis determines whether a component’s resonant frequencies are within a critical region of the system operating envelope, evaluates numerous components for repeatability or quality control, and identifies highly responding blades in a bladed-disk configuration with transfer function analysis and mistuning.

  • 1500 lb, 3000 lb, and 6000 lb electro-dynamic shakers to excite parts up to 3000 Hz from room temperature to 2000 degrees Fahrenheit.
  • Two piezo-electric shakers to excite parts up to 40,000 Hz from room temperature to 2000 degrees Fahrenheit.
  • Accelerometers, strain gauges, or microphones identify responding modes.

Holographic Interferometry (Laser Holography): (back to top)

Laser holography identifies mode shapes and corresponding frequencies of a part; it allows for full-field strain measurements or can provide non-destructive evaluation of a part.

  • Piezo-electric shaker used to excite part in a low-amplitude vibratory environment.
  • Coherent laser light bathes part and creates hologram from extremely small surface deflections resulting from the vibratory excitation.

Low Cycle Fatigue (LCF)/Crack Propagation Testing: (back to top)

LCF/crack propagation testing simulates thermal or stress cycles in a controlled environment to provide quantitative information that is used to estimate component LCF life.

  • Examines part cracking in test center environment to determine the onset of material cracking and subsequent crack propagation.
  • Monitors stresses and corresponding crack orientations and growth rate.

High Cycle Fatigue (HCF) Testing: (back to top)

HCF testing identifies the vibratory capability of a component.

  • Custom-designed and fabricated test rigs to test a variety of components under varying environmental conditions.
  • Conducted at elevated temperatures to account for material debits at operating temperatures.

Wear Testing: (back to top)

Wear testing can evaluate wear coatings, provide rub or wear characteristics, and determine cyclic life expectancy of components.

  • Custom-designed test rigs.
  • Rigs impart relative motion on adjacent components.
  • Coefficients of friction of components are measured for evaluation.

Static Load Testing: (back to top)

Static load testing validates load characteristics of designs and analyses.

  • Load cells apply forces to components under simulated operating conditions.
  • Results can determine buckling loads, limit or ultimate loads, or creep on parts at room temperature up to operating temperatures.

Failure Analysis Testing: (back to top)

FTT Inc.’s highly trained technicians conduct failure analyses to understand the causes of part failure.

  • Lab personnel evaluate field components to identify incipient failures such as wear or crack initiation or more severe distress.
  • Part failure is reconstructed to directly replicate actual operating conditions so part limitations or failure mechanisms can be well documented and understood.

Damper Testing: (back to top)

We test to determine the effectiveness of mechanical dampers or viscoelastic/friction coatings in specific applications.

  • Laboratory verification that dampers reduce component motion and limit dynamic response under loading.
  • Custom damper design.