In situ imaging nanoindentation was used to characterize the differences in longitudinal Modulus of Elasticity (MOE) and hardness of different cell wall layers of softwood tracheids.
The larger pores in the interior of specimens may be saturated and lead to cracking, which result in the decrease of relative dynamic elasticitymodulus.
内部大孔也可能饱和而引起内部开裂，导致相对动弹性模量下降。
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The elasticitymodulusin Mohr-Coulomb model was modified by employing the processing method of tangential modulus in Duncan-Chang nonlinear model.