求教Extension rate (3D) result

ss1217

<strong>求教Extension rate (3D) result<br/></strong>用3D网格形式,流动分析的结果;Extension rate (3D) result的意思和用途?向各路大侠求教,<br/>Extension rate (3D) result<br/>The Extension rate (3D) result is generated from a 3D Flow and 3D Microchip Encapsulation analysis and shows the rate of extension in the mold-cavity at the time the result was written. For a full list of flow analysis results, click here.<br/>Using this result<br/>The extension rate represents the amount of elongation the polymer undergoes as it passes through a change in thickness. Typically this is strongest at gate regions where the flow rate is high and the thickness changes can be large. A contraction is a reduction in thickness along the flow direction, and results in a positive extension (elongation) of the melt. Such extension occurs at the entrance to a gate. Inversely, a negative extension (compression in the flow direction) is experienced by the melt as it passes through an expansion (increase in thickness) such as occurs where a narrow gate connects to a thick part of the cavity. Fiber filled materials undergo significant orientation in regions of strong extension flow.<br/>This extension rate result can be used to see where the flow is undergoing a significant extension. This will have implications for understanding the additional pressure drop (sometimes called the entrance pressure loss) which occurs at gates. This additional pressure drop is dependent on the extensional viscosity of a particular material. If the material you have chosen has juncture loss coefficients data, the additional pressure drop has been included in the simulation pressure predictions.<br/>When the Extension rate (3D) result is displayed, scale the result using Result Plot Properties and the Scaling tab.<br/>The extension rate is equal to zero in a part with uniform thicknesses. When material flows through a contraction in the part, extension rate is positive, and when material flows through an expansion, extension rate is negative.<br/>Tip: Use cutting planes to view 3D temperature results through the solid model. How to?<br/>