纤维位置和取向对纤维增强复合材料断裂载荷的影响。

Effect of fiber position and orientation on fracture load of fiber-reinforced composite.

作者信息

Dyer Scott R, Lassila Lippo V J, Jokinen Mikko, Vallittu Pekka K

机构信息

Department of Restorative Dentistry, Division of Biomaterials and Biomechanics, Division of Prosthodontics, School of Dentistry, Oregon Health and Science University, 611 SW Campus Drive, Portland, OR 97239, USA.

出版信息

Dent Mater. 2004 Dec;20(10):947-55. doi: 10.1016/j.dental.2003.12.003.

DOI:10.1016/j.dental.2003.12.003

PMID:15501323

Abstract

OBJECTIVES

The aim of this study was to determine the effect of fiber position and orientation on the initial and final fracture loads of fiber-reinforced composite (FRC).

METHODS

Test specimens made of two indirect particulate composites (BelleGlass HP, Kerr, Orange, CA) or (Targis, Ivoclar Vivadent, Amherst, NY) were reinforced with ultra high molecular weight polyethylene (UHMWPE) fiber ribbon (Connect, Kerr, Orange, CA), woven E-glass fibers (Vectris Frame, Ivoclar Vivadent, Amherst, NY) or unidirectional R-glass fibers (Vectris Pontic, Ivoclar Vivadent, Amherst, NY). Fibers were placed with different positions, orientations or geometry into the rhombic test specimens (2 x 2 x 25 mm3). Control specimens did not contain fiber reinforcement. The test specimens (n=6) were stored in distilled water for 1 week at 37 degrees C before testing in a three-point loading test to determine the initial and final fracture load values.

RESULTS

Initial failure loads varied from 22.6 to 172.1 N. The lowest value resulted from one UHMWPE reinforcement fiber located in diagonal orientation and the highest from two unidirectional glass fiber reinforcements, one located on the tension side and the second on the compression side.

SIGNIFICANCE

Position and fiber orientation influenced the load to initial and final failure, and specimen deflection. Tension side reinforcement was most effective in increasing the load to initial and final fracture.

摘要

目的

本研究旨在确定纤维位置和取向对纤维增强复合材料（FRC）初始和最终断裂载荷的影响。

方法

由两种间接颗粒复合材料（BelleGlass HP，Kerr，加利福尼亚州奥兰治）或（Targis，Ivoclar Vivadent，纽约州阿默斯特）制成的测试样本，用超高分子量聚乙烯（UHMWPE）纤维带（Connect，Kerr，加利福尼亚州奥兰治）、编织E玻璃纤维（Vectris Frame，Ivoclar Vivadent，纽约州阿默斯特）或单向R玻璃纤维（Vectris Pontic，Ivoclar Vivadent，纽约州阿默斯特）进行增强。将纤维以不同的位置、取向或几何形状放置到菱形测试样本（2×2×25立方毫米）中。对照样本不含纤维增强材料。在三点加载测试中进行测试之前，将测试样本（n = 6）在37摄氏度的蒸馏水中储存1周，以确定初始和最终断裂载荷值。