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SAE J815 (NOV2012)

Current Revision

Load Deflection Testing of Urethane Foams for Automotive Seating

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Traditionally, cellular foam products have been checked for load deflection by determining the load required to cause a 25% deflection. In automotive seating, on the other hand, the load deflection is checked by determining the thickness under constant force conditions to (a) indicate the initial softness of the seat cushion, (b) measure how thick the seat cushion is under the average passenger load (a measurement of padding left for "ride" and seated height), and (c) determine a value to indicate resiliency. In this method these measurements are made by determining the thickness of the seat cushion under fixed loads of 4.5 N, 110 N, and 220 N with a 323 cm2 circular indentor foot.

SDO SAE: SAE International
Document Number J815
Publication Date Nov. 19, 2012
Language en - English
Page Count 3
Revision Level 201211
Supercedes
Committee
Publish Date Document Id Type View
Nov. 19, 2012 J815_201211 Revision
Aug. 13, 2007 J815_200708 Revision
Oct. 30, 2002 J815_200210 Revision
Dec. 10, 2001 J815_200112 Revision
June 1, 1998 J815_199806 Revision
Jan. 1, 1994 J815_199401 Revision