For a comprehensive study of Sheet Molding Compound (SMC) surfaces, topographical data obtained by chromatic confocal imaging were submitted systematically for the development of a profile model to understand the formation of cavities on the surface. In order to qualify SMC surfaces and to predict their coatability, a characterization of cavities is applied. To quantify the effect of surface mo...

Sheet molding compounds (SMC) are very promising for the production of lightweight structural components, due to specific mechanical properties combined with suitability a large-scale manufacturing process. Automotive industry already implements SMC materials components in their vehicle concepts. Polymeric materials, hence also fiber reinforced polymers, show viscoelastic behavior and dynamic-m...

Modeling the compressive behavior of carbon fiber sheet molding compounds (CF-SMC) during processing can be a difficult task. This is due to pronounced porosity SMC materials, which cannot adequately reproduced by currently available compressibility models (also called pvT models). Consequently, macroscopic non-isothermal compression model was developed in this study, easy evaluate and suitable...

Shielding radiation from both x-rays and gamma-rays is important for personnel in medical fields e.g. interventional radiology, nuclear power stations, and other inspection facilities where radiation is involved. Lead is known for its effective shielding property against these high energy radiations, however heaviness and toxicity are its main drawback. In this study effectiveness of non-lead p...

Epoxy molding compounds have been developed which can simultaneously underfill and overmold the Flip Chip die in a single transfer molding process. Transfer molding is a well-defined industry process; with suitable mold design, these materials can utilize the currently installed capital base. The ability to apply pressure during the molding process can reduce the void rate under the die as well...

The compression molding process of carbon fiber sheet compounds (CF-SMC) is characterized by a squeeze flow the material. There are no standardized measurement methods to characterize behavior CF-SMC and conventional shear-flow dominated plastics processing not suitable describe elongational deformation mode during molding. objective this work was develop methodology determine rheological prope...

Resin cross-flow during compression molding of unidirectional sheet molding compound composites, such as CSMC and XMC, may cause severe misorientation of the continuous fibers in the outer layers. The extent of fiber misorientation depends on the type of molding compound, the length of cross-flow, and the location of the charge in the mold. The tensile strength is reduced in the direction of cr...