A5054886990- Cellular and Composite Structures
- Additive Manufacturing and 3D Printing Technologies
- Electronic Packaging and Soldering Technologies
- Fatigue and fracture mechanics
- Mechanical Behavior of Composites
- High-Velocity Impact and Material Behavior
- Advanced Materials and Mechanics
- Additive Manufacturing Materials and Processes
- Manufacturing Process and Optimization
- Innovations in Concrete and Construction Materials
- Microstructure and mechanical properties
- Advanced Welding Techniques Analysis
- Probabilistic and Robust Engineering Design
- Topology Optimization in Engineering
- 3D IC and TSV technologies
- Metallurgy and Material Forming
- Fluid Dynamics Simulations and Interactions
- Architecture and Computational Design
- Marine Sponges and Natural Products
- Calcium Carbonate Crystallization and Inhibition
- Structural Response to Dynamic Loads
- Marine Biology and Environmental Chemistry
- Insect and Arachnid Ecology and Behavior
- Structural Analysis and Optimization
- Integrated Circuits and Semiconductor Failure Analysis
Arizona State University
2018-2024
Middle East Studies Association of North America
2024
Williams (United States)
2022-2023
Kennesaw State University
2023
Phoenix Analysis and Design Technologies (United States)
2016-2017
Purdue University West Lafayette
2006-2012
Intel (United States)
2009
Recent developments in design and manufacturing have greatly expanded the space for functional part production by enabling control of structural details at small scales to inform behavior whole-structure level. This can be achieved with cellular materials, such as honeycombs, foams lattices. Designing structures materials involves answering an important question: What is optimum unit cell application interest? There currently no classification framework that describes spectrum methodology...
The design of metamaterials involves the optimal distribution material inside a volume; therefore, it has benefited from development Additive Manufacturing (AM) techniques. Using AM allows designer to create complex shapes including ones based on curved elements, which can take shape beams or minimal surfaces. Filling space with repetitive patterns is not restricted straight elements struts, as even nature solves all structural problems them. Hence, have been widely used in metamaterial...
The design of cellular materials has recently undergone a paradigm shift, enabled by developments in Additive Manufacturing and software. No longer do have to be limited traditional shapes such as honeycomb panels or stochastic foams. With this increase freedom comes significant optionality, which can overwhelming the designer. This paper aims provide framework for thinking about four key questions material design: how select unit cell, vary cell size spatially, what optimal parameters are,...
Abstract Architected materials such as lattices are capable of demonstrating extraordinary mechanical performance. Lattices often used for their stretch-dominated behavior, which gives them a high degree stiffness at low-volume fractions. At the other end spectrum, bending-dominated tend to be more compliant and interest energy absorption Here, we report class ultra-compliant interwoven that demonstrate up an order magnitude improvement in compliance over traditional counterparts similar...
Lattice-type periodic metamaterials with beam-like struts have been extensively investigated in recent years thanks to the progress additive manufacturing technologies. However, when lattice structures are subject large deformations, computational simulation for design and optimization remains a major challenge due complex nonlinear inelastic effects, such as instabilities, contacts, rate-dependence, plasticity, or damage. In this contribution, we demonstrate first time efficient accurate of...
Abstract Biodiversity provides a massive library of ideas for bio-inspired design, but the sheer number species to consider can be daunting. Current approaches sifting through biodiversity identify relevant biological models include searching champion adapters that are particularly adept at solving specific design challenge. While adapter approach has benefits, it tends focus on narrow set popular while neglecting majority species. An alternative is comparative method, which leverages by...
Architected cellular materials encompass a wide range of design and performance possibilities. While there has been significant interest in periodic materials, recent emphasis included consideration aperiodicity, most commonly studies stochastic graded materials. This study proposes classification scheme for aperiodic by first dividing the domain into three main types: gradation, perturbation, hybridization. For each these types, two decisions are identified: (i) feature that is to be...
A designer of metallic energy absorption structures using additively manufactured cellular materials must address the question which a multitude cell shapes to select from, majority are classified as either honeycomb, beam-lattice, or Triply Periodic Minimal Surface (TPMS) structures. Furthermore, there is more than one criterion that needs be assessed make this selection. In work, six (hexagonal auxetic and Voronoi lattice, diamond, gyroid, Schwarz-P TPMS) spanning all three types were...
The characterization of additively manufactured cellular materials, such as honeycombs and lattices, is crucial to enabling their implementation in functional parts. One the methods commonly employed mechanical testing under compression. This work focuses specifically on dependence these tests applied strain rate during test over low regimes (considered here 10−6 10−1 s−1). paper limited study hexagonal honeycomb structures with four different additive manufacturing processes: one polymer...
The honeybee's comb has inspired the design of engineering honeycomb core that primarily abstract hexagonal cell shape and exploit its mass minimizing properties to construct lightweight panels. This work explored three additional features are part natural honeybee but have not been as well studied interest in design: radius at corner each cell, coping top walls, interface between arrays. These were first characterized using optical X-ray techniques then incorporated into fabricated an...
Lattice structures have tailorable mechanical properties which allows them to exhibit superior (per unit weight) beyond what is achievable through natural materials. In this paper, quasi-static and dynamic behavior of additively manufactured stainless steel lattice cylinders studied. Cylindrical samples with internal structure are fabricated by a laser powder bed fusion system. Equivalent hollow cylindrical the same length, outer diameter, mass (larger wall thickness) also fabricated. Split...
Predicting reliability of solder joints requires a thorough understanding constitutive behavior. Recent studies on SnAgCu alloys have reported that pre-test conditions aging-time and aging-temperatures can be factors significantly affect The results presented here are part ongoing efforts to construct models predict aging affects behavior alloys. In this work, creep test aged Sn3.8Ag0.7Cu samples reported, effects discussed primarily secondary microstructure. Aging primary observed, will...
Predicting the fatigue life of solder interconnections is a challenge due to complex nonlinear behavior alloys and importance load history. Long experience with Sn–Pb together empirical models such as Coffin–Manson rule have helped us identify reliable choices among package design alternatives. However, for currently popular Pb-free choice SnAgCu joints, designing accelerated thermal cycling tests estimating are challenged by significantly different creep relative alloys. In this paper,...
In much of the existing research, SnAgCu solder alloys are characterized at low strain rates, typically in 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-6</sup> to 1 s xmlns:xlink="http://www.w3.org/1999/xlink">-1</sup> range. this paper, we report experimental results and constitutive models for two popular intermediate high ranging from xmlns:xlink="http://www.w3.org/1999/xlink">-2</sup> xmlns:xlink="http://www.w3.org/1999/xlink">3</sup>...