Quasistatic and Dynamic Nanoindentation Measurements of Pinus radiata D. Don S2 and CCML Cell Wall Layers

Quasistatic nanoindentation is a proven tool that provides information on the micromechanical behavior of wood cell walls. However, quasistatic tests cannot probe time-dependent mechanical shown by wood. Nanoindentation dynamic analysis (nanoDMA) can measure viscoelastic properties This research aimed to study and individual radiata pine (Pinus D. Don) wall layers. To minimize variability retrieve both at same locations, load function composed multiload-quasistatic followed reference frequency segments was developed. Nanoindentations were then performed S2 layer compound corner middle lamella (CCML) unembedded latewood cells. Because anisotropic, transverse longitudinal–tangential planes studied. In plane, average results elastic moduli Es for CCML 15.7 GPa 4.6 GPa, respectively. 3.9 GPa. section, hardness H 331 MPa 277 MPa, respectively, in section 244 MPa. acquire properties, measurements made over more than three decades frequency. An increase storage modulus E′, reduction loss E″ factor tanδ as increased found orientations. The quasi-static indentations equivalent 0.1 Hz showed similar values E′. contributes our knowledge properties.