Determination of Modulus of Dynamic Elasticity of Wood Using Ultrasonic Pulse Velocity Testing

Abstract

In the present times, Non Destructive Tests have been applied in many quality evaluations of existing wood structures. One of the Non Destructive Tests (NDT) is based on Ultrasonic Pulse Velocity (UPV). The use of UPV method among others are to estimate the strength of wood, the grade of wood based on Specific Gravity as well as elastic properties of wood. This research will apply the NDT technique. This research used 15 wood test samples in five groups, which were reference Teak (code JT), Yellow Ballau (BK), Camphor (KP), Coconut (KL), and Breadfruit (SK). Those samples were of 100 mm in width, 60 mm in depth, and 500 mm in length. The Ultrasonic Pulse Velocity(UPV) test was conducted with indirect test method. The test result showed that the objects test of Teak, Yellow Ballau, Camphor, Coconut, and Breadfruit are 5,65 km/s, 6,34 km/s, 6,12 km/s, 4, 72 km/s, and 4,94 km/s. Result also showed that Dynamic Modulus of Elasticity (MOEd) for the objects test are 144683 kg/cm2, 314101 kg/cm2, 173973 kg/cm2, 160094,64 kg/cm2, dan 73157,74 kg/cm2.