For the simulation accuracy of springback problem in sheet metal forming,the effect of punch virtual velocity and sheet virtual density on the sheet strain energy was studied in this paper.

Conjugate heat transfer of transient thermal conduction,natural convection and thermal radiation with internal heat sources is simulated numerically using PHOENICS(Version 1 4) with the false density method.

Sketching on methods of measuring apparent density of inorganic chemical products;

Influential factors on apparent density and oil absorbency of suspension resin;

Influences of the apparent density and aging whiteness of PVC on the rheological properties of materials;

Prepration of PVC resin with high bulk density in the presence of compound dispersant;

The effects of mica content on the properties of mica glass composite materials fabricated from recycled soda lime glass powders and natural mica powders were studied by the measurement of bulk density and the complex relationship of the bulk density with mica content were analyzed by SEM.