Skip to Main Content
 

Global Search Box

 
 
 

ETD Abstract Container

Abstract Header

Development and Application of a Computational Modeling Scheme for Periodic Lattice Structures

Fadeel, Abdalsalam
http://rave.ohiolink.edu/etdc/view?acc_num=wright162248153014535

Abstract Details

2021, Doctor of Philosophy (PhD), Wright State University, Engineering PhD.
Sandwich structures are widely used for aerospace, marines and other applications due to their light-weight, strength, and strain energy absorption capability. The cores of the sandwich structure are typically fabricated by using high strength cellular materials such as aluminum and titanium alloys, or polymer foams, and honeycombs. Lattice cell structures (LCS) of different configurations such as body centered cubic (BCC), tetrahedron and pyramidal are being investigated as core material due to their design freedom and periodic nature. Due to the recent advent of additive manufacturing (AM), new research is being sought in the areas of designing and developing application-specific LCS configurations. However, experimental investigation of LCS is costly in time and materials. Therefore, in this dissertation, finite element models are developed using ABAQUS and validated according to previous experimental results to design application-specific LCS. First, an efficient and user-friendly tool was developed and this tool is called the Lattice Structure Designer (LSD). The LSD was developed from ABAQUS GUI and using Python scripting. This tool can be used to create the lattice models, define the materials, define the geometry, define the boundary conditions, apply loads, and submit the jobs to perform the computational analysis. The same tool can be used to access the database files and calculate any additional outputs. This ABAQUS plug-in has effectively helped to capture the responses beyond the plasticity levels and capture the failure mechanisms of the lattice structure. In this research, three types of lattices such as body centered cubic (BCC), tetrahedron with horizontal struts (TetH), and pyramidal (Pyr) are considered. These models are used to understand the failure mechanisms and relation between post-yielding deformations and the topologies of the lattice. All of these configurations were tested under compression in the z direction under quasi-static conditions and are compared with the FEA results. The post-yielding behavior obtained from FEA match reasonably well with the experimental observations providing the validity of the FEA models. Therefore, in this dissertation, finite element models are developed using ABAQUS and validated according to previous experimental results to design application-specific LCS. First, an efficient and user-friendly tool was developed and this tool is called the Lattice Structure Designer (LSD). The LSD was developed from ABAQUS GUI and using Python scripting. This tool can be used to create the lattice models, define the materials, define the geometry, define the boundary conditions, apply loads, and submit the jobs to perform the computational analysis. The same tool can be used to access the database files and calculate any additional outputs. This ABAQUS plug-in has effectively helped to capture the responses beyond the plasticity levels and capture the failure mechanisms of the lattice under compression and impact loads.
Ahsan Mian, Ph.D. (Advisor)
Raghavan Srinivasan, Ph.D. (Committee Member)
Daniel Young, Ph.D. (Committee Member)
Joy Gockel, Ph.D. (Committee Member)
Golam Newaz, Ph.D. (Committee Member)
184 p.
Aerospace Engineering; Aerospace Materials; Engineering; Mechanical Engineering; Polymers
3D printing; lattice structures; post-yield; finite element modeling; stress plateau; energy absorption; Python

Recommended Citations

Citations

  • Fadeel, A. (2021). Development and Application of a Computational Modeling Scheme for Periodic Lattice Structures [Doctoral dissertation, Wright State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=wright162248153014535

    APA Style (7th edition)

  • Fadeel, Abdalsalam. Development and Application of a Computational Modeling Scheme for Periodic Lattice Structures. 2021. Wright State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=wright162248153014535.

    MLA Style (8th edition)

  • Fadeel, Abdalsalam. "Development and Application of a Computational Modeling Scheme for Periodic Lattice Structures." Doctoral dissertation, Wright State University, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=wright162248153014535

    Chicago Manual of Style (17th edition)

wright162248153014535
1,752
© 2021, some rights reserved.Creative Commons License Development and Application of a Computational Modeling Scheme for Periodic Lattice Structures by Abdalsalam Fadeel is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by Wright State University and OhioLINK.