ISSN:
0272-8397
Keywords:
Chemistry
;
Chemical Engineering
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
A simple lab-scale weaving method was used to produce multidirectional fiber preforms to improve the delamination resistance and damage tolerance of composites. Mechanical properties measured in this study included short-beam shear strength and damage tolerance of 2-D and 3-D woven composites. The constituents of fiber and matrix in these composites are Kevlar-29 (Du Pont) and Epon 828 (Shell Chemical Co.) epoxy. Attention was directed to the differentiation of deformation and failure mechanisms in these composites as a function of material parameters and loading conditions. The sequence of failure mechanisms differ between 2-D and 3-D composites. Results indicated that 3-D woven composites exhibited higher shear strength than 2-D woven composites. Also, 3-D composites absorbed more impact energy than 2-D composites. Failure mechanisms of composites subjected to repeated impacts were observed intermittently by using scanning electron microscopy and light microscopy. The failure of 2-D composites was due to a combination of shear and tensile mode, but in 3-D composites the failure was dominated by tensile mode.
Additional Material:
24 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pc.750160204
