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THE PROPOSED PROJECT AIMS AT DEVELOPING A TOOL FOR MULTISCALE MULTIPHYSICS TIME-DEPENDENT PROBLEMS (TA 11.3.7.1). IT IS HYPOTHESIZED THAT THAT THE OVERALL GEOMETRY OF STRUCTURES PRODUCED BY ADDITIVE MANUFACTURING (AM) AFFECTS THE RESIDUAL STRESSES. THE GOAL OF THE TOOL WILL BE TO PRODUCE A CONSTRAINED GEOMETRY THAT MINIMIZES THE RESIDUAL STRESSES CAUSED BY AM WITHOUT LOSING OVERALL STIFFNESS FROM AN APPLIED LOADING. THE METHOD PROPOSED WILL MAKE USE OF NASA'S MICROMECHANICS ANALYSIS CODE (MAC) THAT IMPLEMENTS THE GENERALIZED METHOD OF CELLS (GMC) TO MODEL THE STRUCTURE ACCOUNTING FOR THE HETEROGENEOUS AND ANISOTROPIC EFFECTS OF AM AT THE MICROSCALE. AT THE MACROSCALE TIME-DEPENDENT HEAT TRANSFER METHODS WILL BE USED ALONGSIDE FINITE ELEMENT METHODS (FEM) TO QUANTIFY THE FINAL RESIDUAL STRESSES AND DEFORMATION. A TOPOLOGY OPTIMIZATION (TO) METHOD WILL THEN BE WRAPPED AROUND THIS TO OPTIMIZE THE GEOMETRY FOR MINIMUM RESIDUAL STRESSES.

$63,360FY2020National Aeronautics and Space AdministrationNASA

Western Michigan University, Kalamazoo MI

Investigators

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