Method for analyzing creep characteristic of a plastic molded substance
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United States of America Patent
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Jun 24, 2003
Grant Date -
Apr 17, 2003
app pub date -
Aug 31, 2001
filing date -
Nov 29, 1999
priority date (Note) -
Expired
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Abstract
A method for analyzing creep characteristic of a plastic molded substance is provided wherein the creep characteristic can be analyzed of an actual plastic molded substance having various shape and fastening conditions with high precision. The main stress value for each section of the analysis target is read out, hydrostatic stress .sigma..sub.m of each section is calculated from the main stress value, and the stress condition is determined to be tensile stress when .sigma..sub.m is positive and to be compressive stress when .sigma..sub.m is negative. Tensile or compressive characteristic value is assigned based on the stress condition at each section, and creep is calculated for a predetermined time period based on the characteristic value. By employing characteristic values depending on the stress conditions of each section, precision of creep characteristic analysis is greatly enhanced.
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