Second-strain gradient elasticity parameters for centrosymmetric materials

This is a collection of material parameters sets describing 999, thermodynamically admissible, isotropic, centrosymmetric, elastic materials featuring second-strain gradient elasticity. The notations are according to Mindlin R.D. (1965) Second-gradient theory of strain and surface tension in linear elasticity. Int. J. Solids Structures<br> 1:417-438.本数据集为一套材料参数集，涵盖999个符合热力学相容条件的各向同性、中心对称弹性材料，所有材料均采用二阶应变梯度弹性（second-strain gradient elasticity）理论框架。其符号体系遵循Mindlin R.D.于1965年发表的论文《线性弹性中应变与表面张力的二阶梯度理论》（Second-gradient theory of strain and surface tension in linear elasticity），该论文刊载于《国际固体与结构杂志》（Int. J. Solids Structures），第1卷，第417-438页。