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Heterogeneous Structural Elements Based on Mechanics of Structure Genome- [electronic resource]
Heterogeneous Structural Elements Based on Mechanics of Structure Genome - [electronic res...
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Heterogeneous Structural Elements Based on Mechanics of Structure Genome- [electronic resource]
자료유형  
 학위논문파일 국외
최종처리일시  
20240214101909
ISBN  
9798380727358
DDC  
300
저자명  
Chiu, Rong.
서명/저자  
Heterogeneous Structural Elements Based on Mechanics of Structure Genome - [electronic resource]
발행사항  
[S.l.]: : Purdue University., 2023
발행사항  
Ann Arbor : : ProQuest Dissertations & Theses,, 2023
형태사항  
1 online resource(130 p.)
주기사항  
Source: Dissertations Abstracts International, Volume: 85-05, Section: B.
주기사항  
Advisor: Yu, Wenbin.
학위논문주기  
Thesis (Ph.D.)--Purdue University, 2023.
사용제한주기  
This item must not be sold to any third party vendors.
초록/해제  
요약The Mechanics of Structural Genome (MSG) is a unified homogenization theory used to find equivalent constitutive models for beam, plate, and solid structures. It has been proven accurate for periodic structures. However, for certain applications such as non-prismatic wind turbine blades and helicopter flexbeams featuring ply drop-off, where there is no repeating structure and the periodic boundary condition cannot be used, MSG's accuracy is limited. In this work, we aim to extend MSG to find element stiffness matrices directly for aperiodic structures, instead of beam properties or three-dimensional (3D) solid material properties. Two finite elements based on MSG have been developed: Heterogeneous Beam Element (HBE) and Heterogeneous Solid Element (HSE).For beam modeling, the beam-like structure is homogenized into a series of 3-node Heterogeneous Beam Elements (HBE) with 18 x 18 effective beam element stiffness matrices. These matrices are used as input for one-dimensional (1D) beam analysis using the Abaqus User Element subroutine (UEL). Using the macroscopic beam analysis results as input, we can also perform dehomogenization to predict the stresses and strains in the original structure. We use three examples (a prismatic composite beam, an isotropic homogeneous tapered beam, and a composite tapered beam) to demonstrate the capability of HBE and show its advantages over the MSG cross-sectional analysis approach. HBE can capture macroscopic behavior and detailed stresses due to non-prismatic geometry.The Heterogeneous Solid Element (HSE) is developed based on MSG to model a heterogeneous body as an equivalent solid element using an effective element stiffness matrix. HSE modeling includes homogenization, macroscopic global analysis, and dehomogenization to recover local strains/stresses. HSE avoids the local periodicity assumption for traditional multiscale modeling techniques for composite structures that compute effective material properties instead. Abaqus composite solid element and MSG-based traditional multiscale modeling are used to validate the accuracy of HSE. All example results show that HSE is more accurate in predicting global structural behavior and local strains/stresses.HBE and HSE provide a new concept for modeling aperiodic composite structures by modeling structures into equivalent beam or solid elements instead of beam properties of the reference line in 1D beam analysis or material properties of material points in solid structural analysis.
일반주제명  
Load.
일반주제명  
Kinematics.
일반주제명  
Genomes.
일반주제명  
Mechanics.
일반주제명  
Boundary conditions.
일반주제명  
Composite materials.
일반주제명  
Genetics.
일반주제명  
Mathematics.
기타저자  
Purdue University.
기본자료저록  
Dissertations Abstracts International. 85-05B.
기본자료저록  
Dissertation Abstract International
전자적 위치 및 접속  
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