Abstract
Finite element codes are developed to analyze powder consolidation due to time-independent plasticity and time-dependent plasticity (power law creep and diffusional creep). For time-dependent plasticity, a new algorithm is proposed to obtain a prediction of the plastic strain increment when solving for the nodal displacement increment. This eliminates the use of an ad hoc Newton loop. A set of newly developed micromechanical models are adopted as the constitutive laws for power deformation, where the influence of deviatoric stresses on densification is taken into account. The densification maps are constructed for the powder consolidation in the formation of fiber reinforced composite materials. The influence of fiber volume fraction, powder particle size, temperature and fiber arrangement is investigated.
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