Abstract:
The possibility of a non-destructive transverse vibration technique was studied to evaluate static bending elastic properties of full-size lumbers.Sixty-two commercial spruce, pine and fir lumbers (38mm×89mm×3 658mm) from North American were selected for modulus of elasticity (
MOE) tests.The dynamic
MOE and two static
MOE of each lumber, based on transverse vibration (
Etv), four-point bending test of ASTM D198-99(
E1) and ASTM D4761-96(
E2) respectively, were measured under an air-dried condition.The results indicated that the average
Etv was 5%(0.56 GPa) greater than
E1and 15%(1.46GPa) greater than
E2.Statistical linear regression analyses revealed that significant relationships were evident among dynamic and static elastic properties (at the level of 0.01).The correlation coefficient was 0.853 between
Etv and
E1,and 0.881 between
Etv and
E2.Therefore, it can be concluded that the non-destructive transverse vibration technique can be applied to predict static properties of full-size lumber and provide an indication of the potential for the wood quality evaluation.