张红星

（中国船舶重工集团公司第七一三研究所计检中心，河南 郑州 450015）

摘要：本文从原理上详细的推导出了在平面应力状态下，如何由测得的应变数值来计算主应力数值和方向。其推导过程清晰，结构严谨，并最后以45°应变花为例，给出了其推导出的最终主应力和方向的计算公式。最后给出了利用此计算公式，对某一型号的应变测试数据进行了处理的实例，具有较强的实用性。

关键词：平面应力；胡克定律；应变花；主应变；主应力；主方向

中图分类号：TG801 文献标识码：A 文章编号：1672-4984(2006)02-0052-04

Strain measurement and data processing method in complex stress state

ZHANG Hong-xing

(713 Institute of China Shipbuilding Heavy Industry Corporation,Zhengzhou 450015,China)

Abstract: This article particularly and completely deduced computing formula that can be used to calculate the measurement strains in plain stress state. The deduced course is distinct and the framework is precise. Moreover, it gave the computing formula on strain data processing of rectangular rosette An example that used the formula to process the strain data in an important experimentation was provided in the end. It is very practical.

Key words: Plain strain；Strain rosette; Principal strain; Principal strss; Principal direction