3.2. Shear strength properties
Many of steel nail heads went away by damage of stain (Figure 4), however stainless steel nail heads
did not go away. There were no differences in the failure mode of each nails inserted from sapwood and
heartwood.
Relationship between load and slip displacement obtained from decayed specimens and sound
specimens are shown in Figure 6 and 7, respectively. In this paper, the strength means the yield strength.
It seems that the decayed specimens inserted steel nails were stronger than the sound ones though the
strength and stiffness of decayed specimens inserted stainless steel nail slightly decrease. It seems that the
stain of nails affected the strength properties.
It was indicated that the specimens inserted nails from surface of heartwood was slightly stronger than
from surface of sapwood, and for that reason, it was thought that the damage in mechanical properties
caused by decaying from sapwood was faster than that by decaying from heartwood. It is important to
prepare specimens attacked by fungi for a long term, because it is necessary to evaluate the shear strength
properties of wooden members with steel or stainless steel nails with larger fungal damages
3.2. Shear strength propertiesMany of steel nail heads went away by damage of stain (Figure 4), however stainless steel nail headsdid not go away. There were no differences in the failure mode of each nails inserted from sapwood andheartwood.Relationship between load and slip displacement obtained from decayed specimens and soundspecimens are shown in Figure 6 and 7, respectively. In this paper, the strength means the yield strength.It seems that the decayed specimens inserted steel nails were stronger than the sound ones though thestrength and stiffness of decayed specimens inserted stainless steel nail slightly decrease. It seems that thestain of nails affected the strength properties.It was indicated that the specimens inserted nails from surface of heartwood was slightly stronger thanfrom surface of sapwood, and for that reason, it was thought that the damage in mechanical propertiescaused by decaying from sapwood was faster than that by decaying from heartwood. It is important toprepare specimens attacked by fungi for a long term, because it is necessary to evaluate the shear strengthproperties of wooden members with steel or stainless steel nails with larger fungal damages
การแปล กรุณารอสักครู่..
