Mechanical Engineering Research Open House Presentation Schedule

Poster ID: 75

9:00 - 10:00

Alberico, Gea

ME

Undergrad

Conveyor Belt for the Kuka Robot

Authors: Alberico, Gea; Martin Will

The car lab currently has three functioning robots that are used in the Robotics Class ME: 4140 Modern Robotics and Automation. After several months of studying the robots, my group moved onto our plans to create a conveyor belt in order to help teach students how to use the robot while also allowing my fellow researchers to experiment with code to get the robot to pick up objects on the conveyor. The current project is finding the best motor at an affordable cost. After some research, we decided on the NeveRest Orbital 60 Gearmotor which is small enough to fit the parameters of our conveyor, but still strong enough to create a working torque.

Three-Minute Video: https://youtu.be/Q3QeYdPm5bY

Presentation: alberico_me_vroh_2020.pdf

 

Poster ID: 76

10:00 - 11:00

Danesi Ruiz, Juliana

ME

Undergrad

Reshaping Robotics Laboratories by Optimizing Students Experience: Designing manual and application for the KUKA LBR iiwa robot

Authors: Danesi Ruiz, Juliana; Deierling, Phillip

The Department of Mechanical Engineering at the University of Iowa aims to revamp its approach to the instruction of robotics laboratories. The new Robotics course will be completely dedicated to teaching students' robotics principles and gaining hands-on experience with KUKA robots. We have explored different approaches for the robot manual by using student surveys and researching other university and manufacturer manuals. Also, an application has been created in which students will be able to learn and practice coding.

Three-Minute Video: https://youtu.be/E0TkgAHuKME

Presentation: danesi_ruiz_me_vroh_2020.pdf

 

Poster ID: 77

10:00 - 11:00

He, Xuehuan

ME

Grad

Machine learning prediction of aortic thoracic aneurysm rupture risk using tension-strain data in physiological pressure range: An in vitro study

Authors: Xuehuan He, Jia Lu

In this work, we present a two-step machine learning method to predict where the rupture is likely to occur in ATAA and what safety reserve the structure may have. The study was carried out using ATAA specimens from 15 patients who underwent surgical intervention. It is hypothesized that the region where rupture is prone to initiate is associated with a high level of tension build-up. A machine learning method is devised to predict the peak risk region. The safety is estimated by comparing the physiological tension with the predicted strength.

Three-Minute Video: https://youtu.be/72V5Lha28Js

Presentation: xuehuan_he-_estimation_of_ataa_rupture_risk.pdf

 

Poster ID: 78

11:00 - 12:00

Huang, Wuji

ME

Grad

Wettability Patterning for Metal Surfaces using a Hybrid Laser Texturing and Functionalization Method

Authors: Huang, Wuji; Samanta, Avik; Ding, Hongtao

Surface wettability patterning has attracted considerable attention due to its enormous potential for practical applications such as selective deposition, cell manipulation, etc. In this study, a fast and low-cost method to produce wettability patterns on metal alloy surfaces is developed. A specific area of metal surface is made superhydrophilic while the other part of surface shows superhydrophobic characteristics. The pattern allows water droplets to spread and flow freely just along the superhydrophilic path, which can be used for a wide variety of applications including micro-droplet transport, cooling of electronics, and water collection.

Three-Minute Video: https://youtu.be/ySZ1HBt2UU4

Presentation: huang_me_vroh_2020.pdf

 

Poster ID: 79

11:00 - 12:00

Kielas-Jensen, Calvin

ME

Grad

Optimization-based Receding Horizon Trajectory Planning using a Bernstein Polynomial Transcription Method

Authors: Kielas-Jensen, Calvin; Singhvi, Rachit

The field of autonomous navigation has exploded in the past decade. This development has led to a high demand in computationally efficient motion planning algorithms. We propose an efficient method to compute optimal trajectories using Bernstein polynomials and receding horizon control. Bernstein polynomials possess favorable geometric properties that enable the trajectory planner to efficiently evaluate and enforce constraints along the vehicle’s trajectories. Utilizing a receding horizon approach, we are able to further optimize an initial, feasible trajectory. An exciting benefit of this architecture is that it can allow for safe and efficient learning of optimal trajectories.

Three-Minute Video: https://www.youtube.com/watch?v=U5AWJZ-QsM8

Presentation: kielas-jensen_me_vroh_2020.pdf

 

Poster ID: 80

1:00 - 2:00

Kim, Yagin

ME

Grad

Mathematical modeling of a Submarine Maneuver Near Free Surface

Authors: Kim, Yagin; Carrica, Pablo, M.; Martin, Juan, E.;

Maneuvering Submarine near free surface with low speed is a very challenging problem due to decreased controllability and environmental disturbances including interactions with free surface and surface waves. The objective of the study is to construct a mathematical description for the six-degree-of-freedom motions of the generic submarine BB2 operating near the free surface at slow speeds including modeling of free surface waves, which is essential for the development of controller to overcome the challenges. The model includes external loadings to the submarine evaluated from a set of CFD simulations based on steady state assumption, and the disturbance of surface waves mostly dominated by virtual mass due to the wave-induced flow field.

Three-Minute Video: https://youtu.be/_3rTpbYMPQI

Presentation: kim_me_vroh_2020.pdf

 

Poster ID: 81

10:00 - 11:00

Kotak, Parth

ME

Grad

Physics-based Dynamic Model for the Electro-thermal Actuation of Bio-Inspired Twisted Spiral Artificial Muscles (TSAMs)

Authors: Kotak, Parth; Weerakkody, Thilina; Lamuta, Caterina.

In this study, we propose a physics-based dynamic model that describes the time-varying electro-thermal actuation of Twisted Spiral Artificial Muscles (TSAMs). TSAMs mimic the texture modulating behavior of the papillae muscles of cephalopods and can provide output strains of 2000% with an input voltage of only 0.02 V/mm. The proposed model is experimentally validated on two types of TSAMs and excellent agreement is observed between theoretical and experimental results. Therefore, the dynamic theoretical model allows precise control of the actuation behavior of TSAMs that is essential for the development of TSAMs-based devices such as self-morphing skins, and refreshable Braille displays.

Three-Minute Video: https://youtu.be/o3mhCGGsrtI

Presentation: kotak_me_vroh_2020.pdf

 

Poster ID: 82

1:00 - 2:00

Martin, Will

ME

Undergrad

Object Detection and Tracking System for Industrial Robotics using Raspberry Pi

Authors: Martin, Will; Phillip, Deierling

Many industrial robots are limited to precise but highly repeatable tasks. This study aimed to expand current robotic systems’ repertoire to accomplish unpredictable tasks by utilizing a vision system mounted to a robotic arm. A Raspberry Pi 4, Pi Camera, and Edge TPU hosted the vision system. The design needed to identify and track objects significant to the robot’s operation. Object detection was performed using a TensorFlow Lite machine learning model. This detection model was intermittently run to initialize an OpenCV object tracker. The system was optimized to be cheap, robust, and easily upgraded to handle new objects and situations.

Three-Minute Video: https://youtu.be/eubRjNl1JLg

Presentation: martin_me_vroh_2020.pdf

 

Poster ID: 83

2:00 - 3:00

Okafor, Chuk

ME

Grad

High-order shock capturing schemes for shocks in condensed phase media

Authors: Okafor, Chuk; Udaykumar, H

When heterogeneous energetic materials are subject to an impact or shocks, chemical reactions may be initiated at “hot spots”, which localize at heterogeneities and spread rapidly into the remaining material, culminating in a detonation. Performing high-resolution, computationally intense simulations of the dynamics of heterogeneous energetic (HE) materials demands highly efficient numerics and algorithms. Low-order accurate schemes require very fine meshes to resolve interfaces, shocks and reactive fronts. High-order numerical methods improves the accuracy of the simulation. Small error magnitudes can be achieved using much coarser meshes when compared to low-order methods. This will decrease computational burdens significantly.

Three-Minute Video: https://youtu.be/d8wJK1S7F-M

Presentation: okafor_me_vroh_2020.pdf

 

Poster ID: 84

9:00 - 10:00

Parepalli, Prarthana

ME

Grad

Numerical simulations of void collapse in energetic materials

Authors: Parepalli Prarthana

Energetic materials are a class of materials that contain high chemical energy content in their molecular structure. Heterogeneous energetic materials such as plastic bonded explosives, pressed explosives consist of microstructural non-uniformities such as voids, cracks etc. These materials when interacted with a shock generate locally heated regions called hotspots, which initiate chemical reactions and ignition within these materials. One such physical mechanism that leads to the formation of a hotspot is the void collapse. In this presentation, I would talk about a general framework established in my research to perform numerical simulations of the void collapse in heterogeneous energetic materials.

Three-Minute Video: https://www.youtube.com/watch?v=z2-BlJP9ZPw&feature=youtu.be

Presentation: parepalli_me_vroh_2020.pdf

 

Poster ID: 85

2:00 - 3:00

Paulson, James

ME

Undergrad

Effects of Inflow Velocity Profile and Rotational Accelerations on LEV Formation for a Revolving Wing

Authors: Paulson, James; Jardin, Thierry; Buchholz, James

An aspect ratio 10 rectangular wing is revolved in a cylindrical domain at a 45-degree angle of incidence. Four cases are considered. Case A has an approach velocity which varies linearly with distance from the axis of rotation and Coriolis and centripetal accelerations are active. Case B implements the same inflow but without rotational accelerations. In cases C and D, the rotational accelerations are the same as A and B, respectively; however, the inflow is uniform along the span. Each case exhibits different behavior of the leading-edge vortex (LEV), demonstrating that inflow shear and rotational accelerations both govern LEV attachment.

Three-Minute Video: https://youtu.be/23Whdaao9mc

Presentation: paulson_me_vroh_2020.pdf

 

Poster ID: 86

2:00 - 3:00

Rober, Nicholas

ME

Undergrad

3D Path-Following Control of Underwater Vehicles

Authors: Rober, Nicholas; Cichella, Venanzio

This presentation addresses the problem of guidance and control of underwater vehicles. This is accomplished by using a strategy in which (i) a path-generation algorithm creates a desired path to be followed, (ii) an outer-loop path-following algorithm provides steering commands, and (iii) an autopilot stabilizes the vehicle's dynamics and provides tracking capabilities of the steering commands. This presentation highlights some interesting features of the path-following algorithm which make it a robust and easily adjustable solution to vehicular guidance. Specifically, we discuss the use of a path-following parameter and a desired reference frame which allows adjustment of the steering behavior.

Three-Minute Video: https://youtu.be/Bo5FVH57ZHE

Presentation: rober_me_vroh_2020.pdf

 

Poster ID: 87

1:00 - 2:00

Roy, Shobhan

ME

Grad

Numerical modeling and analysis of response of HMX crystal embedded in binder under shock loading

Authors: Roy, Shobhan; Das, Pratik; Udaykumar, H.S.

The shock-induced initiation of plastic bonded explosives (PBXs) is a complex phenomenon, though the physics occurring at grain-scales are still not well understood. In this work, we take a computational approach to investigate the shock response of an HMX crystal embedded in polyurethane binder, incorporating the profiles from an actual image of a PBX sample. Interface-resolved high-resolution reactive simulations have been carried out using a sharp-interface Eulerian framework. The results show the development of hotspots mainly due to pore collapse and throw light on the ignition mechanism at the short timescales relevant to shock-to-detonation transition in PBXs.

Three-Minute Video: https://youtu.be/lfzEWntzKTo

Presentation: roy_me_vroh_2020.pdf

 

Poster ID: 88

11:00 - 12:00

Seshadri, Pradeep Kumar

ME

Postdoc

Structure-property-performance linkages for heterogeneous energetic materials using transfer-learning generated synthetic microstructures

Authors: Seshadri, Pradeep Kumar; Nguyen, Yen Thi; Roy, Sidhartha; Sen, Oishik; Udaykumar, H.S

Heterogenous Energetic (HE) material designers are interested in the predicting and controlling the initiation sensitivity of HE materials when subjected to shock loads. This work investigates the meso-scale morphometric features of synthetic microstructures generated using Transfer Learning (TL) approach and correlates it to their sensitivity to shocks. The structure-property linkages obtained from synthetic microstructures are compared with that of the real microstructures obtained from SEM images of pressed HMX materials.  We show that the synthetic microstructures closely mimic the global and local morphologies of the real microstructure. Synthetic microstructures also provides hotspot ignition and growth rates in good agreement with those of the real samples. This provides an opportunity for material designers to perform in silico experiments on synthetic microstructures and manipulate microstructural characteristics to achieve performance design outcomes.

Three-Minute Video:

Presentation: seshadri_me_vroh_2020.pdf

 

Poster ID: 89

2:00 - 3:00

Shakib, Mahmudul Alam

ME

Grad

Geopolymer Mortar: A Potential Piezoceramic for Direct Piezoelectric Effect

Authors: Shakib, Mahmudul Alam; Lamuta, Caterina

In this presentation authors have demonstrated the potential of metakaolin based geopolymer as a piezoceramic. Geopolymer has been used in the form of mortar blocks and 3D printed heterogeneous honeycomb structures. The specimens were tested at 0.2-20 Hz quasi-static load of amplitude 250-2000N and charge coefficient of 6.47 pC/N was observed. The direct piezoelectric behavior of the material was independent of external poling that almost all conventional piezoelectric materials require. Aluminosilicate crystal structure and the Electrical Double Layer of solvent ions inside the mortar pores are primarily assumed contributors of the direct piezoelectric effect observed in this research.

Three-Minute Video: https://youtu.be/kASSuNdjZ4s

Presentation: shakib_me_vroh_2020.pdf

 

Poster ID: 90

2:00 - 3:00

Tabasso, Camilla

ME

Grad

Optimal trajectory generation for localization of avalanche victims: In this work we propose a method for the generation of optimal trajectories in search and rescue missions

Authors: Tabasso, Camilla; Wesley, Mary-Kate; Cichella, Venanzio

In this work we propose a method for localization of avalanche victims by multiple UAVs. First, we introduce a model for the estimation of the victims' location, whose performance is captured by the persistency of excitation of a function of the UAVs' trajectories. Finally, we develop an optimal motion planner for the generation of feasible trajectories to efficiently localize avalanche victims.

Three-Minute Video: https://youtu.be/THOU4_8zmWE

Presentation: tabasso_me_vroh_2020.pdf

 

Poster ID: 91

1:00 - 2:00

Walters, Dylan

ME

Grad

Creating Continuum simulations informed by Molecular Dynamics

Authors: Walters, Dylan

The goal of this project is to create Continuum simulations informed by Molecular Dynamics (MD). MD simulations are more fundamental but take significantly longer to run. Thus, we can save time and resources by calibrating Continuum models to MD and running cases at the continuum level. Calibration is accomplished by running equivalent 2-D simulations and then comparing the results while treating MD as the "ground truth." The models and parameters of the Continuum simulations are then modified to assimilate the results. In the future, we hope to apply Artificial Intelligence to align the models at a deeper level.

Three-Minute Video: https://youtu.be/D0WuC5TgQnQ

Presentation: walters_me_vroh_2020.pdf

 

Poster ID: 92

11:00 - 12:00

Weerakkody, Thilina

ME

Grad

Wrist Rehabilitation Device Powered by Twisted and Coiled Artificial Muscles

Authors: Weerakkody, Thilina; Greco, Carlo; Cichella, Venanzio; Pagnotta, Leonardo; Lamuta, Caterina

In recent years, rehabilitation robotics has advanced towards the development of wearable technologies to promote home rehabilitation. However, most of the existing portable devices are powered by bulky and noisy conventional electrical, hydraulic, or pneumatic actuators. We propose a lightweight wearable wrist rehabilitation device powered by novel Twisted-and-Coiled-Artificial-Muscles (TCAMs). Carbon-fiber/silicone-rubber-based TCAMs have shown significant capabilities such as the ability to lift 12,600 times of their weight and tensile strokes up to 60%, with less than 0.2 V/cm of input voltage. Our device is able to perform wrist flexion/extension and ulnar/radial deviation and overcomes the main drawbacks of the existing technologies.

Three-Minute Video: https://youtu.be/XRqikZwdMh4

Presentation: weerakkody_me_vroh_2020.pdf

 

Poster ID: 93

9:00 - 10:00

Yuan, Ben

ME

Grad

Turbulent Bubble Breakup and Coalescence in Hybrid RANS/LES Models: Improvements on modeling bubble breakup and coalescence induced by turbulence-bubble interaction

Authors: Yuan, Ben; Li, Jiajia; Carrica, Pablo

Bubble breakup and coalescence is important in ship hydrodynamics as they extract energy from the ship and leave visual and acoustic traces of the ship. We made several physical modifications on the existing breakup and coalescence models including using a full energy spectrum instead of an approximated one, taking bubble-liquid relative velocity into consideration, etc.  We performed simulation over a variety of turbulence conditions using high fidelity LES-type methods. The predicted bubble size distribution match well with the experiment. Our model can handle more complex turbulence condition therefore more application scenarios.

Three-Minute Video: https://youtu.be/R3m6lKiRwQo

Presentation: yuan_me_vroh_2020.pdf