There is a distinct difference between tensile and compressive modulus. Xylem is a kind of anisotropic material and modeling its mechanical model needs anisotropic constitutive relations.
拉伸弹性模量与压缩弹性模量有明显差异，木质部属各向异性材料，建立力学模型应采用各向异性的本构关系。
There is a distinct difference between tensile and compressive modulus. Xylem is a kind of anisotropic material and modeling its mechanical model needs anisotropic constitutive relations.
拉伸弹性模量与压缩弹性模量有明显差异，木质部属各向异性材料，建立力学模型应采用各向异性的本构关系。
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