ACC, UDRI seek industry help developing automotive tensile test standard

The American Chemistry Council (ACC) and the University of Dayton Research Institute (UDRI) are working to develop a high-rate tensile test standard for fiber-reinforced polymers in automotive applications.

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The American Chemistry Council (ACC, Washington, D.C., USA) and the University of Dayton Research Institute (UDRI, Dayton, Ohio, USA) are spearheading an effort to develop a high-rate tensile test standard for fiber-reinforced polymers in automotive applications. This effort is slated to begin with a kick-off meeting involving those in industry, government, and academia who use, generate, or apply high-rate material property data. The meeting is planned for June 5, 2014 in Troy, Mich., USA.

ACC and UDRI have arranged the research for the industry. Now, those who have an interest in supplying the automotive value chain are needed to speak up, participate and perhaps test some of their components.

UDRI will serve as the key technical contact to organize and help establish a group of committed and interested parties to support development of the standard. The University of Dayton (UD) and UDRI have a long history in materials, structures, and mechanical systems research. In fact, the Structures and Materials Evaluation Group of UDRI (SME-UDRI) was previously funded by the ACC to develop a high-rate tensile specimen that would be suitable for fiber-reinforced polymers. SME-UDRI was successful in identifying key requirements for proper measurement of the tensile mechanical properties and determined the mechanical properties of fiber-reinforced polypropylene at nominal rates up to 500/s.

However, the consortium that developed the high-rate tensile standard for unfilled polymers (SAE J24749) recognized that there were three significant concerns with the geometry in the high-rate standard:

  • The effect that the geometric transition from the tab-to-gauge portion of the specimen and the molding conditions have on the distribution and orientation of fibers in long-fiber reinforced polymers (or long-fiber filled polymers);
  • The stress state in the gauge area and the stress concentration at the specimen radius;
  • The length of the fibers relative to the specimen gauge length, width and thickness.

Now, ACC and UDRI are leading an effort to expand the SAE J2749 standard to include fiber-filled polymers. UDRI will serve as the facilitator at the initial meetings to help identify the concerns and needs of the industry, to define the scope and establish the phases to achieve the standard. 

For more information, contact Susan I. Hill, group leader - Structures and Material Evaluation Group Structural Integrity Division, University of Dayton Research Institute,, +1 937-229-2190.