Additively Manufactured Shock Absorbing Engineered Materials

Technical Report · Thu Nov 01 04:00:00 EDT 2018

DOI:https://doi.org/10.2172/1761082· OSTI ID:1761082

Leathe, Nicholas ^[1]; Seepersad, Carolyn ^[2]; Debeau, David ^[2]; Morris-Eckart, Audrey ^[1]

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1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
2. Univ. of Texas, Austin, TX (United States)

This study investigates the static and dynamic mechanical performance of conformal negative stiffness honeycomb structures. Negative stiffness honeycombs are capable of elastically absorbing a static or dynamic mechanical load at a predefined force threshold and returning to their initial configuration after the load is released. Most negative stiffness honeycombs rely on mechanical loading that is orthogonal to the base of the structure. In this study, a more three-dimensional design is presented that allows the honeycomb to conform to complex surfaces and protect against impacts from multiple directions. The conformal designs are additively manufactured in nylon and stainless steel and subjected to quasi-static mechanical loading and dynamic mechanical impact tests that demonstrate their impact protection capabilities.

• Research Organization: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• DOE Contract Number: AC04-94AL85000; NA0003525
• OSTI ID: 1761082
• Report Number(s): SAND--2018-13454; 670574
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING