利用已得到的三维轴对称问题的非局部弹性应力的解，采用级数近似展开的方法，求解环状裂纹的边值问题。
Solves the problem of boundary value on an annular crack by using the nonlocal stress solution of an axisymmetric crack problem and approximative method of series expansion.
混凝土实测应变包含弹性应变、徐变应变及混凝土自由变形、温度应变等非应力应变。
The measured strain of concrete includes the elastic strain, creep strain and also the non-stress strain like the concrete free deformation and temperature strain.
而在低温保温阶段，应力虽然较高，但温度较低，非弹性应变也不明显。
The reason is that both temperature and stress combine to affect the accumulation of inelastic strain.
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