Nonlinear least squares: A method for simultaneous thermal property determination in ablating polymeric materials


  • Prod. No. 1367


A method of data interpretation known as nonlinear least squares has recently been applied by several authors to the study of polymeric materials. Nagler has used a modified method proposed by Blizzard and Jirka and has concluded that the method is impractical because it requires excessive computer time. It is shown that the difficulties Nagler encountered are inherent in Blizzard and Jirka's method, but not in the basic method. Three steps are outlined to minimize computer time, and a summary of successful applications is presented.