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Dynamic Impact Usage in the Aircraft Industry

Fri, Oct 30, 2020

For the past 25 years, MGA has been a leader in testing for the Aircraft industry. Alongside major players in the aerospace industry, MGA modified and developed previous technology to create the inverted pendulum, also known as HIC (Head Injury Criteria) on a stick. This technology stemmed from the need to evaluate the performance of aircraft seatbacks and seat back components. This apparatus, accompanied with the free motion head-form (FMH), is used by MGA to test for blunt trauma as well as sharp or injurious edges per 14 CFR 25.785 (b) & (d) and ANM-03-115-32. Aside from Certification testing, MGA uses technology originally created for the automotive industry to conduct research and development tests. The Linear Impactor has been used for many years for automotive testing, but has now been used for extensive engineering tests to increase aerospace technologies. The use of these three impact systems has been effective in cutting costs and time compared to running multiple dynamic row-to-row or HIC tests.

 

 

Some of these Applications include:

  • Conducting impacts on seat backs to evaluate and compare different HIC mechanisms on seats.
  • Impacting different HIC pads or items in the head trajectory to compare what is the best option to use during a full scale sled row-to-row or HIC test.
  • Using the linear impactor to determine the amount of displacement, force and energy absorbed during an impact on a monitor, seat back or other components.
  • Comparing how different materials’ stiffness, flexibility and hardness can affect results on the blunt trauma criterion.
  • The ability to strike any critical area on a seat in order to determine what could cause a failure during a HIC test.
  • Fixture building that allows for specific seatback component tests.

 

In order to evaluate different components of a test article, MGA uses additional data collection equipment to provide our customers with additional data points. These include force and moment load cells, strain gauges, deformations, and photometric analysis. These capabilities have proven to be useful for our customers’ further development of their products. The results from these tests assist with FEA simulations and correlations. Using the dynamic impact systems allows for a more cost effective way of analyzing different aircraft components that are tied with HIC testing, allowing our customers to determine the best course of action to move forward.

For more information or inquiries please contact David Suazo by email at David.Suazo@mgaresearch.com or by phone to +1 (972) 550-9122.