# Mass scaling

 Mass scaling is often used in Abaqus/Explicit for computational efficiency in quasi-static analyses and in some dynamic analyses that contain a few very small elements that control the stable time increment. Mass scaling can be used to: scale the mass of the entire model or scale the masses of individual elements and/or element sets; scale the mass on a per step basis in a multistep analysis; and scale the mass at the beginning of the step and/or throughout the step. Mass scaling can be performed by: scaling the masses of all specified elements by a user-supplied constant factor; scaling the masses of all specified elements by the same value so that the minimum stable time increment for any element in the element set is equal to a user-supplied time increment; scaling the masses of only the elements in the element set whose element stable time increments are less than a user-supplied time increment so that the element stable time increment for these elements becomes equal to the user-supplied time increment; scaling the masses of all specified elements so that their element stable time increments each become equal to the user-supplied time increment; and scaling automatically based on mesh geometry and initial conditions for bulk metal rolling analyses. The following topics are discussed:
 Related Topics Explicit dynamic analysis In Other Guides Mass adjustment About Output *FIXED MASS SCALING *VARIABLE MASS SCALING Configuring a dynamic, explicit procedure Configuring a dynamic fully coupled thermal-stress procedure using explicit integration

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