Pengaruh Fraksi Volume Terhadap Sifat Bending Komposit Widuri-Polyester

This research is aimed to know the effect of volume fraction toward the characteristics of composite bending of widuri – polyester with volume fraction 20%, 30%, and 40%. The materials used in this research are widuri fiber bark in condition before floworing,during floworing,fruting with polyster resin matrix. The sample of bending experiment are made to the standard of ASTM D790 than during the experiment. The result of research, the bending high value happens to the volume fraction 40% with value of 63,322 MPa, and the lowest is on the condition of plant before floworing with folume fraction 20% is 37,584 Mpa, the highas elastisition molulus happens to the condition of floworing to volume fraction 20% is 99,654 MPa, in other words, the bending moment , which is the highest, to the condition of flowering to the volume fraction 40% is 7501,59 Nmm, and the lowest appears two the condition of plant before floworing with the volume fraction 20% is 4984,72 Nmm, from the result of marco photo shows that the type of many factures are on the sample of bending experiment