Study on the wood physical and mechanical properties of Carya illinoinensis
In order to make up the current situation of our country's shortage of high-quality wood resources and develop the multiele useness of pecan,in this paper,23-year-old pecan trees were selected as the research object to test the physical and mechanical indexes such as wood density,dry shrinkage,compressive strength,bending strength and impact toughness,and the changes of physical and mechanical properties in the axial direction and the correlation be-tween the indexes were analyzed.The main results showed that the air dry density,compressive strength,flexural strength,flexural modulus,tensile strength and impact toughness were 0.813 g·m-3,51.7 MPa,108.2 MPa,11.39 GPa,167.8 MPa and 121 kJ·m-2,respectively,and the comprehensive strength was 159.9 MPa.The flexural strength,flex-ural compressive strength and flexural tensile strength firstly increased and then decreased,the flexural modulus in-creased with the growth of tree height,and the impact of toughness decreased in the axial direction,which indicated that tree height had certain effects on the five mechanical properties of pecan wood.Except for the tensile strength,the five mechanical indexes were all significantly correlated with each other,indicating that the four mechanical indexes were interrelated and influenced each other.The comprehensive evaluation of wood properties indicated that pecan wood has reached the high level of domestic wood,and has an excellent wood property.
Carya illinoinensiswoodphysical propertymechanical propertyaxial law
万方数据
维普
