NON-LINIER COMPRESSION STRESS-STRAIN CURVE MODEL FOR HARDWOOD
Abstract: Non-linier compression
stress-strain relationship was derived from experimental investigation of 144
small clear specimens of three Indonesian hardwood species, namely Acacia,
Meranti and Kruing. Both compression parallel to the grain and compression
perpendicular to the grain were tested. The stress-strain curve consists of
linier-elastic line until proportional limit and bi-linier curve. Stress-strain
curve parameters for compression parallel to the grain, such as elastic
modulus, post-elastic modulus, proportional limit, ultimate stress and
post-elastic strain limit were derived based on the specific gravity. And also
stress-strain curve parameters for compression perpendicular to the grain, such
as elastic modulus, post-elastic modulus and proportional limit were derived based
on the specific gravity and the angle between stress direction and tangential
axis direction. Compression strength perpendicular to the grain in tangential
direction was found much lower than compression strength perpendicular to the
grain in radial direction.
Keywords: compression parallel
to the grain, compression perpendicular to the grain, stress-strain curve,
nonlinier curve model, post-elastic strain limit
Penulis: Adhijoso Tjondro,
Bambang Suryoatmono, Iswandi Imran
Kode Jurnal: jptsipildd160624