Mechanical Behavior and Damage Mechanisms of Glass Microballoon Filled Elastomers

Kevin Long1, Yinan Lu2, Judith Brown1, Helena Jin1, Rong Long2, Zachary Casias1, Jay D. Carroll1

  1. Sandia National Laboratories
  2. University of Colorado Boulder

Filled, rubbery thermosets are commonly used as potting materials for shock protection of electrical and mechanical components. In this work, we examine the behavior of an elastomeric matrix filled with crushable, glass microballoons (GMBs), which can provide impact absorption. The material studied in this work is Sylgard® 184 silicone elastomer filled with several different concentrations of 3M® A16/500 GMBs.
Currently, the damage mechanisms in Sylgard 184/GMB are not fully understood. These potentially include GMB-matrix debonding, GMB fracture, and matrix damage. In this work, we examine damage in a number of loading scenarios such as compression, tension, hydrostatic compression, and torsion. The mechanical behavior of the composite in these scenarios is analyzed and compared to micromechanical observations and models to understand damage accumulation and improve predictions of component behavior.

Sandia National Laboratories is a multi-mission laboratory managed and operated by National Technology and Engineering Solutions of Sandia, LLC., a wholly owned subsidiary of Honeywell International, Inc., for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-NA0003525.