Abstract In order to mimic the natural heterogeneity of native tissue and provide a better microenvironment for cell culturing, multi-material bioprinting has become common solution construct models in vitro . With embedded printing method, complex 3D structure can be printed using soft biomaterials with reasonable shape fidelity. However, current sequential method faces major challenge, which ...

Heterogeneous objects are composed of different constituent materials. In these objects, material properties from different constituent materials are synthesized into one part. Therefore, heterogeneous objects can offer new material properties and functionalities. The task of modeling material heterogeneity (composition variation) is a critical issue in the design and fabrication of such hetero...

A reasoning Boolean operation based CAD modeling approach applied to construct heterogeneous material objects is presented. This reasoning Boolean operation consists of a merging operation and an extracting operation, and it is executed according to the material-dominant information de®ned in the designed heterogeneous object database. In addition to the material-dominant Boolean union, subtrac...

Finite Element Analysis (FEA) is an important step for the design of structures or components formed by heterogeneous objects such as multi-materials, Functionally Graded Materials (FGMs), etc. The main objective of the FEA-based design of heterogeneous objects is to simultaneously optimize both geometry and material distribution over the design domain (e.g., Homogenization Design Method). Howe...

This paper presents a new approach to model complex heterogeneous objects with simultaneous geometry intricacies as well as complex material distributions. Different from most of the existing approaches, which utilize manifold B-Rep and the assembly representations, the proposed scheme takes advantage of the non-manifold cellular representations to model the geometries of the heterogeneous obje...

The flowing material balance (FMB) method is widely used to evaluate geological reserves because it does not require shut-in wells and uses daily production data. original FMB based on a homogeneous medium model, but the reservoir often heterogeneous. In this study, equations are derived for radial composite reservoirs naturally fractured reservoirs, effect of parameters estimation analyzed. st...