Wood Flashcards
A versatile organic material, a natural composite of cellulose fibers (which are strong in tension) embedded in a matrix of lignin that resists compression.
classified as renewable and has been used for thousands of years as both fuel and construction material.
Wood
What is the reason why the color of the wood change?
prolonged exposure to the atmosphere or by age. It can also
change by applying different chemical on it which triggers a
reaction.
It is the longitudinal arrangement of wood fibers or the pattern resulting from such an arrangement. It has various derived terms refer to different aspects of the fibers or patterns. Wood grain is important in woodworking and it impacts aesthetics.
Wood Grain
What happens if the Force is perpendicular to the Wood’s grain
The strength of the wood is high, and is the main reason why wood was used as supports in construction
What happens if the Force is parallel to the Wood’s grain
The strength of the wood is low and is easly split in half, main purpose is only for decorative
The ability of a material to absorb moisture. Wood can absorb water as a liquid when in contact with it, or as vapor from the surrounding atmosphere. This influences the moisture content of the wood, causing it to shrink or swell.
HYGROSCOPICITY
Wood undergoes dimensional changes when its moisture content fluctuates. Loss of moisture causes shrinkage, making the wood smaller, while gaining moisture leads to swelling, causing the wood to expand.
SHRINKAGE / SWELLING
The ability of wood to resist forces that compress or push it together. This property is important in structural elements like beams and columns.
Compressive Strength
The ability to withstand bending forces without breaking. Cruicial for applications like floor joists and rafters
Bending Strength
Wood’s ability to resist pullingforces. It is weaker along thegrain and stronger across it.
Tensile Strength
The property by which a body acted upon by external forces tends to retain its natural size and shape or resists deformation.
Stiffness
is the ability of a material towithstand elastic deformationwithout deforming plastically.
Resilience
Measures of resistance to surface wear or indentation. Hardwoods generally have higher hardness ratings than softwoods.
Hardness
the degree of ease with which amaterial can be split.
Cleavability
Products that are harvested directly from treesand do not experience any fundamentalchanges. These materials generally showcasethe grains and defects that are found in naturalgrown trees.
Natural Wood
