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Cao Research Group

The Cao research group is led by Dr. Lei Cao, associate professor in Mechanical Engineering. We strive to understand microscopic mechanisms governing the mechanical properties of materials. We develop and use advanced phase-field methods, molecular dynamics, and density-functional theory to explore various physical processes critical to the mechanical properties of materials.
Our Research

Recent News

Exciting Things are Happening at Cao Research Group Everyday!

NSF CAREER Award

CAREER: Fundamental investigation of twin boundary engineering through cyclic cross-phase-boundary thermomechanical processing

Dr. Cao won the prestigious NSF CAREER award! We will use atomistic simulations, first-principles calculations, and phase-field finite element modeling to investigate the thermomechanical processing in titanium alloys. The work will potentially advance the manufacturing of stronger and more ductile titanium alloys.

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NSF Award

RII Track-4: NSF: Establish predictive crystal plasticity models with complete deformation twinning mechanism

Our project, "Establish predictive crystal plasticity models with complete deformation twinning mechanism," is funded by NSF! We will use molecular dynamics and crystal plasticity to investigate the twin formation in Magnesium.

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NSF Award

CDS&E: Nanoconfined Heating via Ultrahigh-repetition-rate Lasers for Enhanced Surface Processing,

Our project, "CDS&E: Nanoconfined Heating via Ultrahigh-repetition-rate Lasers for Enhanced Surface Processing," in collaboration with Dr. Yan Wang from our department is funded by NSF! We will use molecular dynamics and phase-field modeling to investigate the microstructure formed during ultrafast cooling and the resulting mechanical properties.

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NSF Award

Modeling and Design of Enhanced Strength and Ductility Through Grain Boundary Engineering--A Study of Boron Carbide Based Superhard Materials

Our project, "Modeling and Design of Enhanced Strength and Ductility Through Grain Boundary Engineering--A Study of Boron Carbide Based Superhard Materials," in collaboration with Dr. Qi An from the Chemical & Materials Engineering Department is funded by NSF! We will use phase-field modeling to study the impact of grain boundaries and twin boundaries on the mechanical properties of boron carbide.

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NASA Seed Grant

Microstructure-Oriented Manufacturing of Thermoelectric Materials for Space Power Applications

Our project, "Research Infrastructure Development for Microstructure-Oriented Manufacturing of Thermoelectric Materials for Space Power Applications," is funded by NASA! Dr. Cao is the lead PI and will work closely with Dr. Yan Wang (co-PI) from UNR and Dr. Jaeyun Moon (co-PI) from UNLV on this exciting project.

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Student Graduation

Amir Hassan Zahiri, PhD student

Dr. Cao and Amir took a picture in front of Palmer Engineering. Amir has been awarded the the prestigious Dean’s Merit Scholarship as well as the Outstanding Graduate Student Scholarship for his excellent research and academic achievements. Amir will join the University of Michigan as a postdoc associate to continue his work on metals and alloys.

Congratulations, Amir!

Media Coverage

Representation in the STEM field

"One common thing I get asked is how I feel about choosing the field of engineering as a woman or if I feel a sort of responsibility, and I do feel a responsibility," Cao said. "I think it's very important to have more women engineers in the STEM field because we don't realize how important it is to have role models for students."

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NSF CAREER award

Cao’s project involves developing computer models that can predict how microstructures within titanium alloys change under heat and pressure. The computer models can connect atomic-level material processes to design macroscopic material properties by rationally designing microstructures. The project also will advance another of her goals: preparing students in Science, Technology, Engineering and Math (STEM) for the workforce by with integrated skills in mechanical engineering and materials science.

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New Paper

Formation of {11-22} contraction twins in titanium through reversible martensitic phase transformation

Our paper, "Formation of {11-22} contraction twins in titanium through reversible martensitic phase transformation," is published in Scripta Materialia! We used molecular dynamics simulations to investigate the nucleation mechanism of the {1122} compression twin, which is one of the predominant deformation mode in hexagonal close packed titanium and zirconium.

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New Paper

Transformation-induced plasticity in omega titanium

Our paper, "Transformation-induced plasticity in omega titanium," is published in Journal of Applied Physics! Amir is the first author. We used molecular dynamics simulations to investigate the deformation-induced plasticity in omega titanium.

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New Paper

Our paper, "Lattice thermal transport in superhard hexagonal diamond and wurtzite boron nitride: A comparative study with cubic diamond and cubic boron nitride," is published in Carbon! Pranay is the first author. This work is in collaboration with Dr. Yan Wang and Dr. Guoping Xiong from our department.

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New Paper

Nucleation of {1012} Twins in Magnesium through Reversible Martensitic Phase Transformation

Our paper, "Nucleation of {1012} Twins in Magnesium through Reversible Martensitic Phase Transformation," is published in Metals! We used molecular dynamics simulations to investigate the nucleation mechanism of the {1012} twin, which is the predominant deformation mode in hexagonal close packed metals.

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New Paper

Strong strain hardening in ultrafast melt-quenched nanocrystalline Cu: The role of fivefold twins

Our paper, "Strong strain hardening in ultrafast melt-quenched nanocrystalline Cu: The role of fivefold twins," is published in Journal of Applied Physics! Amir is the first author. We used molecular dynamics simulations to investigate fivefold twin network formed in ultrafast quenched Cu and its contribution to the sustained strain hardening effect.

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Career Started

Dr. Cao started her career as an assistant professor in mechanical engineering at UNR

Dr. Cao has graduated from the Ph.D program in Mechanical Engineering at Purdue University with a Ph.D.. Now that she is starting her career as an assistant professor in mechanical engineering at the University of Nevada, Reno.

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