J2979_201205 Test Method for Vulcanized Rubber and Thermoplastic Elastomer Determination of Compressive Stress Relaxation (CSR) Response

ASTM and ISO procedures exist that address Compression Stress Relaxation (CSR) in general, but they do not provide specific details on several factors involved in determining the CSR response, nor do they deal with the Automotive Standard (ASD) CSR Test Jig. This test method addresses those limitations along with a methodology that produces better accuracy and reproducibility. This test method and ASD fixtures have been used extensively over the past 10 years by Material & Component Suppliers, and Automotive OEMs, and after many evaluations, has been considered a very reliable test system. Based on this, the SAE Committee on Automotive Rubber Specifications (CARS) sponsored SAE J2979 with the interest of having an acceptable, more specific test method developed with the ASD configuration, for measuring an elastomer material or compound’s compression stress relaxation response.