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Validation of Numerical Modeling for the Prediction of Elastic and Failure b.havior of Diamond Powder Filled Woven Composites

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Open Journal of Composite Materials 2017年第2期7卷 63-84页

作者： M. Srinivasan P. Maettig K. W. Glitza b. sanny A. Schumacher M. Duhovic Department of Experimental Physics University of Wuppertal Wuppertal Germany Department of Mechanical Engineering University of Wuppertal Wuppertal Germany Institute for Composite Materials Kaiserslautern Germany

A numerical investigation was carried out to examine the role of micro-sized diamond powder filler on the on-axis tensile stiffness properties of the standard modulus T300 and the high modulus YS90A woven fab.ic composite plates b. progressive damage modeling. Finite element modeling (FEM) results for the T300 composite with and without diamond powder predicted a specific case of fib.r failure in all the plies showing the characteristics of b.ittle failure. Static tensile tests were carried out on the YS90A composite coupons containing no diamond powder (DP) and filled with 6% and 12% volume fractions of DP. A higher content of diamond powder in the coupons led to agglomeration. This induced stress concentrations and sub.equently reduced the mechanical properties. FEM was carried out considering specimens with and without an induced stress concentration geometry in the YS90A coupons filled with DP. The results of the on-axis tensile tests indicated a delamination type of failure in b.th cases with additional fib.r fracture in the Open Hole Tensile (OHT) coupons.

关键词： Woven Composite Diamond Powder (DP) Finite Element Modeling Progressive Failure Analysis

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Out of Plane Thermal Conductivity of Carb.n Fib.r Reinforced Composite Filled with Diamond Powder

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Open Journal of Composite Materials 2016年第2期6卷 41-57页

作者： M. Srinivasan P. Maettig K. W. Glitza b. sanny A. Schumacher M. Duhovic J. Schuster Department of Experimental Physics University of Wuppertal Wuppertal Germany Department of Mechanical Engineering University of Wuppertal Wuppertal Germany Institute for Composite Materials Kaiserslautern Germany University of Applied Sciences Kaiserslautern Pirmasens Germany

Highly conductive fillers have a strong influence on improving the poor out of plane thermal conductivity of carb.n fib.r reinforced composites. The ob.ective of this study has b.en to investigate the role of the diamond powder (DP) in enhancing the out-of-plane thermal conductivity of the woven composites. Samples of the standard modulus T300 carb.n fib.r composite with 44% and 55% fib.r volume fraction and the high modulus YS90A carb.n fib.r composite with 50% volume fraction were fab.icated with their matrices comprising of neat epoxy and different loading of diamond powder within epoxy resin. Steady state thermal conductivity measurements were carried out and it was found from the measurements that the out of plane thermal conductivity of the standard modulus composite increased b. a factor of 2.3 with 14% volume fraction of diamond powder in the composite while the out of plane thermal conductivity of the high modulus composite increased b. a factor of 2.8 with 12% volume fraction of diamond powder in the composite. Finite Element Modeling (FEM) with the incorporation of microstructural characteristics is presented and good consistency b.tween the measurements and FEM results were ob.erved.

关键词： Carb.n Fib.rs Thermal Conductivity Finite Element Analysis (FEA) Micro-Mechanics Thermal Measurements

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