一、试验计划 1.研究方法 为研究三维应力状态而采用的冻结法乃是以合成树酯所具有的可冻结变形状态的能力为依据。通过升高温度冻结变形状态。改变了模型材料在室温下的特性系数,虽然这只能近似地满足相似准则(参见第一节中的4),然而可便于用计算方法估算不同横向膨胀系数和变形状态对应力分布的影响(参见第四节中的1)。 First, the experimental plan 1. Research Methods To study the three-dimensional stress state and the freezing method used is based on synthetic resin can have the ability to freeze deformation state. Freeze the deformation state by raising the temperature. The characteristic coefficients of the model material at room temperature have been changed. Although this only approximates the similarity criterion (see Section 4, Section 4), it is convenient to use computational methods to estimate the effects of different transverse expansion coefficients and deformation states on the stress distribution See 1 in section IV).