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首页> 外文会议>Annual Symposium on Quantitative Nondestructive Evaluation; 19980719-24; Snowbird,UT(US) >COMBINED THERMOELASTIC AND PHOTOELASTIC FULL-FIELD STRESS MEASUREMENT
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COMBINED THERMOELASTIC AND PHOTOELASTIC FULL-FIELD STRESS MEASUREMENT

机译：热弹性和光弹性全应力组合测量

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摘要

With thermoelastic measurements providing the sum of the principal stresses and photoelasticity providing the difference of the principal stresses plus the principal direction, there is enough information to resolve the components of stress tensor over the full viewing area regardless of free surfaces. The two systems differ in surface preparation but have been linked through a polycarbonate coating which has been shown to work with both systems. An electromagnetic wave theory has been developed which calculated the retardation between the extraordinary and ordinary waves . This was used to calculate photoelastic isoclinic lines which were found to vary as the reflective layer partially depolarized the wave at the back surface. The calculated slope of the isoclinic lines varied as much as 55% which would drastically affect the determination of the stress tensor components.
机译：通过提供主应力之和的热弹性测量和提供主应力与主方向之差的光弹性测量，无论自由表面如何，都有足够的信息来解析整个可视区域上的应力张量分量。两种系统的表面处理有所不同，但已通过聚碳酸酯涂层连接在一起，事实证明这两种体系均适用。发展了电磁波理论，计算了异常波与普通波之间的延迟。这用于计算光弹性等斜线，发现其随着反射层使背面的波部分消偏振而发生变化。等斜线的计算斜率变化多达55％，这将极大地影响应力张量分量的确定。

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