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Ｔｈｅ ｄｉｓｐｌａｃｅｍｅｎｔ ａｎｄ ｄｅｆｏｒｍａｔｉｏｎ ｃｈａｒａｃｔｅｒｉｓｔｉｃｓ ｏｆ ｔｈｅ ｉｎｎｅｒ ａｎｄ ｏｕｔｅｒ ｓｕｒｆａｃｅｓ ｏｆ ｔｈｅ ｐａｃｋｅｒ ｒｕｂｂｅｒ ｕｎｄｅｒ ｔｈｅ ｉｎｉｔｉａｌ ｌｏａｄ ｉｎ ｔｈｅ ｆｒｅｅ ｄｅｆｏｒｍａｔｉｏｎ ｓｔａｇｅ ｗｅｒｅ ｉｎｖｅｓｔｉｇａｔｅｄ． Ｂａｓｅｄ ｏｎ ｔｈｅ ｃｏｎｔｉｎｕｕｍ ｍｅｃｈａｎｉｃｓ， ａ ｆｉｎｉｔｅ⁃ｄｅｆｏｒｍａｔｉｏｎ ｍａｔｈｅｍａｔｉｃａｌ ｍｏｄｅｌ ｗａｓ ｅｓｔａｂｌｉｓｈｅｄ ｉｎ ｔｈｅ ｆｒｅｅ ｄｅｆｏｒｍａｔｉｏｎ ｓｔａｇｅ． Ｔｈｅ ｐｒｏｃｅｓｓ ｏｆ ｒａｄｉａｌ ｄｅｆｏｒｍａｔｉｏｎ ｏｆ ｔｈｅ ｉｎｎｅｒ ａｎｄ ｏｕｔｅｒ ｓｕｒｆａｃｅｓ ｏｆ ｔｈｅ ｐａｃｋｅｒ ｒｕｂｂｅｒ ｕｎｄｅｒ ｔｈｅ ｉｎｉｔｉａｌ ａｘｉａｌ ｌｏａｄ ｗａｓ ｇｉｖｅｎ， ａｎｄ ｔｈｅ ａｎａｌｙｔｉｃａｌ ｓｏｌｕｔｉｏｎ ｏｆ ｔｈｅ ｎｏｎｌｉｎｅａｒ ｄｅｆｏｒｍａｔｉｏｎ ｏｆ ｔｈｅ ｐａｃｋｅｒ ｒｕｂｂｅｒ ｗａｓ ｏｂｔａｉｎｅｄ． Ｔｈｒｏｕｇｈ ｎｕｍｅｒｉｃａｌ ｃａｌｃｕｌａｔｉｏｎ， ｂａｓｅｄ ｏｎ ｔｈｅ ｓｏｌｕｔｉｏｎ ｏｆ ａｎａｌｙｔｉｃａｌ ｆｏｒｍｕｌａｅ ｆｏｒ ｆｒｅｅ ｄｅｆｏｒｍａｔｉｏｎ ｏｆ ｔｈｅ ｏｕｔｅｒ ｓｕｒｆａｃｅ， ｔｈｅ ｉｎｆｌｕｅｎｃｅｓ ｏｆ ｔｈｅ ｎｏｎｌｉｎｅａｒ ｄｅｆｏｒｍａｔｉｏｎ ｌａｗ ａｎｄ ｔｈｅ ｒｅｌｅｖａｎｔ ｐａｒａｍｅｔｅｒｓ ｏｎ ｔｈｅ ｓｅａｌｉｎｇ ｐｅｒｆｏｒｍａｎｃｅ ｏｆ ｔｈｅ ｉｎｎｅｒ ｓｕｒｆａｃｅ ｗｅｒｅ ｆｕｒｔｈｅｒ ａｎａｌｙｚｅｄ． Ｔｈｅ ｒｅｓｕｌｔｓ ｏｆ ｄｅｆｏｒｍａｔｉｏｎ ｃｈａｒａｃｔｅｒｉｓｔｉｃｓ ｃａｎ ｂｅ ａｐｐｌｉｅｄ ｔｏ ｄｉｆfｅｒｅｎｔ ｔｙｐｅｓ ｏｆ ｐａｃｋｅｒ ｒｕｂｂｅｒｓ， ａｎｄ ｐｒｏｖｉｄｅ ａｎ ｉｍｐｏｒｔａｎｔ ｔｈｅｏｒｅｔｉｃａｌ ｂａｓｉｓ ｆｏｒ ｔｈｅ ｓｅａｌｉｎｇ ａｎｄ ｒｅｌｉａｂｉｌｉｔｙ ｄｅｓｉｇｎ ｏｆ ｐａｃｋｅｒ ｒｕｂｂｅｒｓ． [ABSTRACT FROM AUTHOR]

An exploration on course design model is proposed for new and interdisciplinary subjects such as human factors engineering, in order to cultivate students’ knowledge of “Knowing-Judgment-Improvement-Design”. The paper mainly focuses on the open design subject type, to bring forward the time of course design assignments, to pay attention to students ’ research habit forming of finding problem , to emphasis course design specification ’ s logic, diverse and visualization, and to attach much weight on value judgment of students’ spirit of exploration and research during course design period. The practice proved that the new course design model can significantly improve students’ interest, ability and consciousness on applying theoretical knowledge to solve practical problems. [ABSTRACT FROM AUTHOR]