SOE - Scholarly Publications: Recent submissions

Now showing items 461-480 of 693

An Enhanced Model for combined heat and air infiltration energy simulation

Abi Shdid, Caesar; Younes, Chadi; SOE; 199431340; Civil Engineering; caesar.abishdid@lau.edu.lb

The need for efficient, sustainable, and planned utilization of resources is ever more critical. Several building energy analysis tools have been developed to assess energy demands and lifecycle energy costs in buildings. ...
Cross-hole sonic logging and frequency tomography analysis of drilled shaft foundations to better evaluate anomalies locations

Abi Shdid, C.; Hajali, M.; SOE; 199431340; Civil Engineering; caesar.abishdid@lau.edu.lb

Cross-hole sonic logging (CSL) has over recent years become the standard method for evaluating the integrity of bridge drilled shafts. The CSL method is based on measuring the speed of ultrasonic waves traveling between ...
Ionic Liquid Nafion Nanofiber Mats Composites for High Speed Ionic Polymer Actuators

Akle, B.; Nah, C.; Kwak, S. K.; Kim, N.; Lyu, M.-Y.; Hwang, B.S.; Leo, D. J.; SOE; 200700940; Industrial And Mechanical Engineering; barbar.akle@lau.edu.lb

A new attempt is made for application of the NafionTM nanofiber mat prepared by the electrospinning process to solve the main disadvantage of slow response speed of ionomer-ionic liquid transducers. The measured conductivities ...
Structural capacity reduction of drilled shaft foundations due to corrosion in longitudinal bars

Abi Shdid, Caesar; Hajali, Masood; SOE; 199431340; Civil Engineering; caesar.abishdid@lau.edu.lb

Drilled shafts are a common type of deep foundations used to support a wide array of infrastructure facilities such as bridges, high mast lighting, tanks and communication towers. The deep inaccessible subterranean nature ...
Validating a new model for rapid multi-dimensional combined heat and air infiltration building energy simulation

Abi Shdid, Caesar; Younes, Chadi; SOE; 199431340; Civil Engineering; caesar.abishdid@lau.edu.lb

The relative accuracy of current thermal simulation algorithms is evaluated against an intricate multiphysics hygrothermal computational fluid dynamics (CFD) building envelope analysis that incorporates, in addition to ...
Effect of the location of broken wire wraps on the failure pressure of prestressed concrete cylinder pipes

Abi Shdid, Caesar; Hajalo, Masood; Alavinasab, Ali; SOE; 199431340; Civil Engineering; caesar.abishdid@lau.edu.lb

The effect of the location of broken prestressing wire wraps on the overall strength of prestressed concrete cylinder pipes (PCCP) is investigated here. An advanced computational model based on non-linear finite element ...
Ionomer design for augmented charge transport in novel ionic polymer transducers

Akle, Barbar J.; Duncan, Andrew J.; Long, Timothy E.; Leo, Donald J.; SOE; 200700940; Industrial And Mechanical Engineering; barbar.akle@lau.edu.lb

Ionic polymer transducers are devices that display electromechanical transduction and are projected to have extensive applications as actuators and sensors. This study employs novel, highly branched sulfonated polysulfones ...
Experimental validation of an empirical model for computing the diameter of drilled shafts during construction using CSL signal processing

Abi Shdid, Caesar; Hajali, Masood; SOE; 199431340; Civil Engineering; caesar.abishdid@lau.edu.lb

Drilled shaft foundations are increasingly being used to support various types of buildings and infrastructure facilities. The load carrying capacity of these drilled shafts is largely dependent on their diameter. The large ...
Experimental demonstration of the active area model in extensional ionic polymer transducers

Akle, Barbar J.; Leo, Donald J.; SOE; 200700940; Industrial And Mechanical Engineering; barbar.akle@lau.edu.lb

Ionic polymer transducers (IPTs) also known as ionic polymer metal composites (IPMCs) are soft smart materials that are well characterized in bending actuation. A salient feature of an IPT is its ability to generate large ...
Design of an improved signal conditioning circuit for ionic polymer sensors based on the streaming potential hypothesis

Akle, Barbar J.; SOE; 200700940; Industrial And Mechanical Engineering; barbar.akle@lau.edu.lb

Ionic polymer transducers also known as ionic polymer metal composites belong to the family of electroactive polymer transducers. Electroactive polymers are flexible and lightweight devices that operate as sensors and ...
Applications of fast fourier transform in the integrity evaluation of deep foundations

Abi Shdid, Caesar; Hajali, Masood; SOE; 199431340; Civil Engineering; caesar.abishdid@lau.edu.lb

The widespread use of drilled shafts and the large and critical nature of loads they carry make post-construction quality control a rather important aspect of inspections. For this reason, states have implemented specific ...
Effect of the number of broken wire wraps on the structural performance of PCCP with full interaction at the gasket joint

Hajali, M.; Alavinasab, A.; Abi Shdid, C.; SOE; 199431340; Civil Engineering; caesar.abishdid@lau.edu.lb

Broken prestressing wire wraps are the main cause of failure in prestressed concrete cylinder pipes (PCCP). The effect of the number and location of broken wire wraps on the structural performance of PCCP is investigated ...
Electromechanical transduction in multilayer ionic transducers

Akle, Barbar; Leo, Donald J.; SOE; 200700940; Industrial And Mechanical Engineering; barbar.akle@lau.edu.lb

A transducer consisting of multiple layers of ionic polymer material is developed for applications in sensing, actuation and control. A multilayer transducer is fabricated by layering individual transducers on top of one ...
Developments in Coarse-Grain Modeling of Transient Heat-Flow in Buildings

Abi-Shdid, C.; Flood, I.; Issa, R.; Kartam, N.; SOE; 199431340; Civil Engineering; caesar.abishdid@lau.edu.lb

The note reports on recent developments to the coarse-grain method (CGM) of modeling transient heat flow in buildings. CGM was originally developed as an alternative to conventional fine-grain modeling techniques [such as ...
Simulating the thermal behavior of buildings using artificial neural networks-based coarse-grain modeling

Abi-Shdid, C.; Flood, I.; Issa, R.; SOE; 199431340; Civil Engineering; caesar.abishdid@lau.edu.lb

This paper reports on the development of a new approach for simulating the thermal behavior of buildings that overcome the limitations of conventional heat-transfer simulation methods such as the finite difference method ...
Modelangelo

Akle, B.; Hamade, R. F.; Zeineddine, F.; Smaili, A.; SOE; 200700940; Industrial And Mechanical Engineering; barbar.akle@lau.edu.lb

A PC-based, CAD-driven, 5-axis rapid prototyping (RP) robotic system that uses subtractive technology is presented. ModelAngelo, as it is called, consists of six integrated hardware and software subsystems. The system ...
Biomimetic jellyfish-inspired underwater vehicle actuated by ionic polymer metal composite actuators

Akle, Barbar; Najem, Joseph; Sarles, Stephen A.; Leo, Dona; SOE; 200700940; Industrial And Mechanical Engineering; barbar.akle@lau.edu.lb

This paper presents the design, fabrication, and characterization of a biomimetic jellyfish robot that uses ionic polymer metal composites (IPMCs) as flexible actuators for propulsion. The shape and swimming style of this ...
Single-Walled Carbon Nanotubes – Ionic Polymer Electroactive Hybrid Transducers

Akle, Barbar J.; Leo, Donald J.; SOE; 200700940; Industrial And Mechanical Engineering; barbar.akle@lau.edu.lb

Ionic electroactive polymers, sometimes referred to as artificial muscles, have the ability to generate large bending strain and moderate stress at low applied voltages. Typical types of ionic electroactive polymer transducers ...
Direct assembly process

Akle, Barbar J.; Bennett, Matthew D.; Leo, Donald J.; Wiles, Kenton B.; McGrath, James E.; SOE; 200700940; Industrial And Mechanical Engineering; barbar.akle@lau.edu.lb

Ionic polymer transducers (IPT) consist of an ion-exchange membrane plated with flexible conductive electrodes on their outer surface. Compared to other types of electromechanical transducers, ionomeric transducers have ...
Reliability of high strain ionomeric polymer transducers fabricated using the direct assembly process

Akle, Barbar; Nawshin, Saila; Leo, Donald; SOE; 200700940; Industrial And Mechanical Engineering; barbar.akle@lau.edu.lb

Ionomeric polymer transducers have received considerable attention in the past several years. These actuators, sometimes referred to as artificial muscles, have the ability to generate large bending strain and moderate ...

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