Abstract Combining with the constitutive relation of orthotropic materials, a fatigue topology optimization model considering materials is established based on Independent Continuous Mapping (ICM) method. It uses minimum structural mass as objective, element life constraint condition, and criterion The filtration function, stiffness function are introduced to identify whether material retained....

abstract background: fatigue and changes in sleep patterns are one of the impressive features in the first year after birth, which havenegative effects on work, family life, and social relationships. therefore, the objective of this research was to investigate the relationship between fatigue and stanford sleepiness with the general health of mothers in the postpartum period. materials and meth...