Let me introduce myself….Let me introduce myself….M iM i P i M h diP i M h diMy name is My name is Parnia MohammadiParnia Mohammadi……

andandI am a PhD student in University of Houston…I am a PhD student in University of Houston…

My BackgroundMy BackgroundB d G i hi IB d G i hi IBorn and Grew up in shiraz, IranBorn and Grew up in shiraz, Iran

Graduated in math and physics major from high school in Iran (1994) and passed the Graduated in math and physics major from high school in Iran (1994) and passed the national exam in the same yearnational exam in the same year

Bachelor’s Degree in mechanical engineering, fluid mechanics from Shiraz University, Iran Bachelor’s Degree in mechanical engineering, fluid mechanics from Shiraz University, Iran (1998) (1998)

Master’s Degree in mechanical engineering, solid mechanics from Shiraz University, Iran Master’s Degree in mechanical engineering, solid mechanics from Shiraz University, Iran (2001)(2001)(2001) (2001)

Member of swimming team in Shiraz UniversityMember of swimming team in Shiraz University

Worked as a mechanical engineer in designing pressure vessels in oil and petrochemicalWorked as a mechanical engineer in designing pressure vessels in oil and petrochemicalWorked as a mechanical engineer in designing pressure vessels in oil and petrochemical Worked as a mechanical engineer in designing pressure vessels in oil and petrochemical industry, PIDEC, Iran (2001industry, PIDEC, Iran (2001--2006)2006)

Worked as a mechanical engineer in designing pressure vessels in oil and petrochemical Worked as a mechanical engineer in designing pressure vessels in oil and petrochemical industry, S&B Engineers and Constructors Inc., Houston, Tx (2006industry, S&B Engineers and Constructors Inc., Houston, Tx (2006--2008)2008)

Part time PhD student in mechanical engineering, nanomechanics at University of Part time PhD student in mechanical engineering, nanomechanics at University of Houston (2006Houston (2006--2008) 2008)

Currently pursuing full time in PhD program in mechanical engineering, nanomechanics at Currently pursuing full time in PhD program in mechanical engineering, nanomechanics at y p g p g g g,y p g p g g g,University of Houston (since 2008)University of Houston (since 2008)

I am originally from Iran…I am originally from Iran…My first language is Farsi…My first language is Farsi…My first language is Farsi…My first language is Farsi…

Middle East is an area which covers parts of west Asia and North East Africa

Capital of Iran, TehranCapital of Iran, Tehran

My town, ShirazMy town, Shiraz

Iran’s NatureIran’s Nature(lots of mountains, deserts, seas and jungles)

Iran’s NatureIran’s Nature

My FamilyMy FamilyMy FamilyMy Family

I t i d i 2004I t i d i 2004I got married in 2004I got married in 2004My husband is a mechanical engineer My husband is a mechanical engineer I have a 3I have a 3--year old son year old son

Cullen College of EngineeringCullen College of Engineeringg g gg g gMechanical EngineeringMechanical EngineeringChemical and Biomolecular EngineeringChemical and Biomolecular EngineeringCivil and Environmental EngineeringCivil and Environmental EngineeringElectrical and Computer EngineeringElectrical and Computer EngineeringIndustrial EngineeringIndustrial EngineeringBiomedical EngineeringBiomedical EngineeringPetroleum EngineeringPetroleum Engineering

What is mechanical engineering?What is mechanical engineering?g gg gMechanical engineering is a discipline of Mechanical engineering is a discipline of engineeringengineering that applies the principles of that applies the principles of physicsphysics and and materials sciencematerials science for analysis, design, for analysis, design, manufacturingmanufacturing, and , and maintenance of maintenance of mechanicalmechanical systemssystems like like

Manufacturing plantsManufacturing plantsIndustrial equipment and machineryIndustrial equipment and machineryHeating and cooling systemsHeating and cooling systemsM t i d hi lM t i d hi lMotorized vehicles Motorized vehicles AircraftAircraftWatercraftWatercraftRoboticsRoboticsM di l d iM di l d iMedical devices Medical devices and more... and more...

It is one of the oldest and broadest It is one of the oldest and broadest engineering disciplinesengineering disciplines.. The field has The field has continually evolved to incorporate advancements in technology, and mechanicalcontinually evolved to incorporate advancements in technology, and mechanicalcontinually evolved to incorporate advancements in technology, and mechanical continually evolved to incorporate advancements in technology, and mechanical engineers today are pursuing developments in such fields as engineers today are pursuing developments in such fields as compositescomposites, , mechatronicsmechatronics, and , and nanotechnologynanotechnology. .

Our LaboratoryOur LaboratoryyyNo chemicalNo chemicalNo equipmentNo equipmentToo many people (not shown)!Too many people (not shown)!Computers Computers Desks and conference tablesDesks and conference tables

Dr Pradeep Sharma (Associate professor of Dr Pradeep Sharma (Associate professor of Mechanical Engineering in UH)Mechanical Engineering in UH)g g )g g )

Our research group performs multiOur research group performs multiOur research group performs multiOur research group performs multi--disciplinary research on properties, disciplinary research on properties, behavior and performance of materials behavior and performance of materials and systems spanning the length and systems spanning the length scales from atomistic level to the gross scales from atomistic level to the gross macroscalemacroscale..

My ResearchMy Research

Effective Homogenized Surface Stress and Surface Elasticity Constants of Rough Surfaces

For doing my research, I need to have some knowledge of solid mechanics and material For doing my research, I need to have some knowledge of solid mechanics and material science in general and nanomechanics, surface elasticity and theory of homogenizationscience in general and nanomechanics, surface elasticity and theory of homogenizationscience in general and nanomechanics, surface elasticity and theory of homogenization science in general and nanomechanics, surface elasticity and theory of homogenization in particular.in particular.

And my research goal is to find the correlation between surface roughness and material And my research goal is to find the correlation between surface roughness and material properties in Nano Scales.properties in Nano Scales.

My main research work is theoretical but I also do some computer simulationMy main research work is theoretical but I also do some computer simulationMy main research work is theoretical but I also do some computer simulationMy main research work is theoretical but I also do some computer simulation

My ResearchMy ResearchSolid Mechanics: Solid mechanics is the branch of mechanics, physics, and mathematics that concerns the behavior of solid matter under external actions (e.g., external forces, temperature changes, applied displacements, etc.) p g pp p )

Material science: investigates the relationship between the structure of materials at atomic or molecular scales and their macroscopic properties.

Nanoscience and Nanomechanics: are the study of the controlling of matter on an atomic and molecular scale (at least one dimension between 1 to 100 nanometer). Involves developing materials or devices within that size. Nanotechnology may be able to create many new materials and devices with a vast range of applications, such as in medicine electronics biomaterials energy production solving problems concerningmedicine, electronics, biomaterials , energy production, solving problems concerning about the toxicity and environmental impact and more.Nanomechanics is a branch of nanoscience studying fundamental mechanical (elastic, thermal and kinetic) properties of physical systems at the nanometer scale

My ResearchMy Research

Surface Elasticity: Atoms at the surface of materials have different equilibrium position than atoms inside the bulk due to lack of some neighborhood atoms and so the layer surface has different property than bulk Soand so the layer surface has different property than bulk. So for nano scale that the surface-volume ratio is high, this difference is important and shall be considered. Surface elasticity is study the elastic behavior of the materials at the surface.

My Research Goal: Finding effective surface properties of rough surfaces at nano scaleproperties of rough surfaces at nano scale.

Effective elastic propertyReal elastic property