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Proc. ASME. HT2017, Volume 2: Heat Transfer Equipment; Heat Transfer in Multiphase Systems; Heat Transfer Under Extreme Conditions; Nanoscale Transport Phenomena; Theory and Fundamental Research in Heat Transfer; Thermophysical Properties; Transport Phenomena in Materials Processing and Manufacturing, V002T15A006, July 9–12, 2017

Paper No: HT2017-4856

DOI: https://doi.org/10.1115/HT2017-4856

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Topics: Additive manufacturing, Testing, Thermal conductivity, Polymer composites, Heat exchangers, Heat transfer, Metals, Polymers, Brass (Metal), Bronze

Proceedings Papers

Effects of Defects on the Performance of Hierarchical Honeycomb Metamaterials Realized Through Additive Manufacturing

Kazi Moshiur Rahman, Todd Letcher, Zhong Hu

Proc. ASME. IMECE2016, Volume 2: Advanced Manufacturing, V002T02A028, November 11–17, 2016

Paper No: IMECE2016-66940

DOI: https://doi.org/10.1115/IMECE2016-66940

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Topics: Additive manufacturing, Honeycomb structures, Metamaterials, Manufacturing, Weight (Mass), Density, Elastic moduli, Elasticity, Engineering simulation, Engineering systems and industry applications

Proceedings Papers

An Experimental Investigation of the Effects of Gamma Radiation on 3D Printed ABS for In-Space Manufacturing Purposes

Behzad Rankouhi, Fereidoon Delfanian, Robert McTaggart, Todd Letcher

Proc. ASME. IMECE2016, Volume 1: Advances in Aerospace Technology, V001T03A042, November 11–17, 2016

Paper No: IMECE2016-67745

DOI: https://doi.org/10.1115/IMECE2016-67745

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Topics: Additive manufacturing, Gamma rays, Manufacturing, Equipment performance, Mechanical properties, Testing, Cobalt, Extraterrestrial radiation, Feedstock, Irradiation (Radiation exposure)

Proceedings Papers

Experimental Study of Mechanical Properties of Additively Manufactured ABS Plastic as a Function of Layer Parameters

Todd Letcher, Behzad Rankouhi, Sina Javadpour

Proc. ASME. IMECE2015, Volume 2A: Advanced Manufacturing, V02AT02A018, November 13–19, 2015

Paper No: IMECE2015-52634

DOI: https://doi.org/10.1115/IMECE2015-52634

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Topics: Additive manufacturing, Mechanical properties, Elastic moduli, Stress, Manufacturing, Computer software, Elongation, Engineers, Machinery, Materials properties

Proceedings Papers

Mechanical Properties of Additively Manufactured PEEK Components Using Fused Filament Fabrication

Kazi Moshiur Rahman, Todd Letcher, Riley Reese

Proc. ASME. IMECE2015, Volume 2A: Advanced Manufacturing, V02AT02A009, November 13–19, 2015

Paper No: IMECE2015-52209

DOI: https://doi.org/10.1115/IMECE2015-52209

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Topics: Additive manufacturing, Manufacturing, Mechanical properties, Compression, Impact testing, Tensile strength, Testing, Absorption, Contamination, Elastic moduli

Proceedings Papers

Material Property Testing of 3D-Printed Specimen in PLA on an Entry-Level 3D Printer

Todd Letcher, Megan Waytashek

Proc. ASME. IMECE2014, Volume 2A: Advanced Manufacturing, V02AT02A014, November 14–20, 2014

Paper No: IMECE2014-39379

DOI: https://doi.org/10.1115/IMECE2014-39379

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Topics: Additive manufacturing, Materials properties, Testing, Fatigue testing, Bending (Stress), Creep, Damage, Fatigue, Mechanical properties, Recycling

Proceedings Papers

Hysteresis Strain Energy Behavior of Al6061-T6 With Multi-Fatigue Load Levels as Applied to an Energy-Based Fatigue Life Prediction Method

Todd Letcher, Sepehr Nesaei, Cody Auen, Matt Nielsen, Fereidoon Delfanian

Proc. ASME. IMECE2013, Volume 9: Mechanics of Solids, Structures and Fluids, V009T10A101, November 15–21, 2013

Paper No: IMECE2013-64684

DOI: https://doi.org/10.1115/IMECE2013-64684

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Topics: Fatigue, Fatigue life, Stress, Testing, Design, Fatigue testing

Proceedings Papers

Applying an Energy-Based Fatigue Life Prediction Method to Unnotched and Notched Al6061-T6 Specimen

Sepehr Nesaei, Todd Letcher, Fereidoon Delfanian

Proc. ASME. IMECE2013, Volume 9: Mechanics of Solids, Structures and Fluids, V009T10A100, November 15–21, 2013

Paper No: IMECE2013-64485

DOI: https://doi.org/10.1115/IMECE2013-64485

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Topics: Fatigue life, Fatigue, Fracture mechanics, Fracture (Materials), Stress, Buckling, Low cycle fatigue, Prediction theory

Journal Articles

Strain Rate and Loading Waveform Effects on an Energy-Based Fatigue Life Prediction for AL6061-T6

Todd Letcher, M.-H. H. Shen, Onome Scott-Emuakpor, Tommy George, Charles Cross

J. Eng. Gas Turbines Power. February 2014, 136(2): 022502.

Paper No: GTP-13-1150

DOI: https://doi.org/10.1115/1.4025497

Published Online: November 1, 2013

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Topics: Fatigue, Fatigue life, Stress, Testing, Cycles

Journal Articles

A Robust Optimization Technique for Calculating Scaling Coefficients in an Energy-Based Fatigue Life Prediction Method

Todd Letcher, John Wertz, M.-H. Herman Shen

J. Eng. Gas Turbines Power. December 2013, 135(12): 122502.

Paper No: GTP-13-1151

DOI: https://doi.org/10.1115/1.4025315

Published Online: September 20, 2013

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Topics: Fatigue, Fatigue life, Optimization, Stress, Fracture (Materials), Fracture (Process)

Proceedings Papers

An Energy-Based Axial Isothermal-Mechanical Fatigue Lifing Method

John Wertz, Todd Letcher, M.-H. Herman Shen, Onome Scott-Emuakpor, Tommy George, Charles Cross

Proc. ASME. GT2012, Volume 7: Structures and Dynamics, Parts A and B, 207-214, June 11–15, 2012

Paper No: GT2012-68889

DOI: https://doi.org/10.1115/GT2012-68889

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Topics: Fatigue, Temperature, Testing, Materials properties, Operating temperature

Proceedings Papers

A Robust Optimization Technique for Calculating Scaling Coefficients in an Energy-Based Fatigue Life Prediction Method

Todd Letcher, John Wertz, M.-H. Herman Shen

Proc. ASME. GT2012, Volume 7: Structures and Dynamics, Parts A and B, 215-223, June 11–15, 2012

Paper No: GT2012-68905

DOI: https://doi.org/10.1115/GT2012-68905

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Topics: Fatigue life, Optimization, Accounting, Fracture (Materials), Fracture (Process), Stress, Density, Design, Fatigue, Probability

Proceedings Papers

Strain Rate and Loading Waveform Effects on an Energy-Based Fatigue Life Prediction for AL6061-T6

Todd Letcher, M.-H. Herman Shen, Onome Scott-Emuakpor, Tommy George, Charles Cross

Proc. ASME. GT2012, Volume 7: Structures and Dynamics, Parts A and B, 225-233, June 11–15, 2012

Paper No: GT2012-68911

DOI: https://doi.org/10.1115/GT2012-68911

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Topics: Fatigue life, Waves, Cycles, Fatigue, Stress, Tension, Testing

Proceedings Papers

Damage Parameter Assessment for Energy Based Fatigue Life Prediction Methods

Casey M. Holycross, John N. Wertz, Todd Letcher, M.-H. Herman Shen, Onome E. Scott-Emuakpor, Tommy J. George

Proc. ASME. GT2012, Volume 7: Structures and Dynamics, Parts A and B, 235-240, June 11–15, 2012

Paper No: GT2012-68919

DOI: https://doi.org/10.1115/GT2012-68919

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Topics: Damage, Fatigue life, Fracture (Materials), Fracture (Process), Energy dissipation, Brittle fracture, Failure data, Failure mechanisms, Fatigue, Low cycle fatigue

Journal Articles

An Energy-Based Axial Isothermal-Mechanical Fatigue Lifing Method

John Wertz, Todd Letcher, M.-H. Herman Shen, Onome Scott-Emuakpor, Tommy George, Charles Cross

J. Eng. Gas Turbines Power. October 2012, 134(10): 102502.

DOI: https://doi.org/10.1115/1.4007121

Published Online: August 17, 2012

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Topics: Fatigue, Stress, Temperature, Testing, Operating temperature

Journal citation

NARROW

Nanomechanical Characterization of Additive Manufactured GRCop-42 Alloy Developed by Directed Energy Deposition Methods

Investigation of Additive Manufactured GRCop-42 Alloy Developed by Directed Energy Deposition Methods

The Effects of 3D Printing Parameters and Surface Roughness on Convective Heat Transfer Performance

Effects of Gamma Irradiation Upon the Mechanical and Chemical Properties of 3D-Printed Samples of Polylactic Acid

In-Plane Stiffness of Additively Manufactured Hierarchical Honeycomb Metamaterials With Defects

Thermal Conductivity Testing Apparatus for 3D Printed Materials

Effects of Defects on the Performance of Hierarchical Honeycomb Metamaterials Realized Through Additive Manufacturing

An Experimental Investigation of the Effects of Gamma Radiation on 3D Printed ABS for In-Space Manufacturing Purposes

Experimental Study of Mechanical Properties of Additively Manufactured ABS Plastic as a Function of Layer Parameters

Mechanical Properties of Additively Manufactured PEEK Components Using Fused Filament Fabrication

Material Property Testing of 3D-Printed Specimen in PLA on an Entry-Level 3D Printer

Hysteresis Strain Energy Behavior of Al6061-T6 With Multi-Fatigue Load Levels as Applied to an Energy-Based Fatigue Life Prediction Method

Applying an Energy-Based Fatigue Life Prediction Method to Unnotched and Notched Al6061-T6 Specimen

Strain Rate and Loading Waveform Effects on an Energy-Based Fatigue Life Prediction for AL6061-T6

A Robust Optimization Technique for Calculating Scaling Coefficients in an Energy-Based Fatigue Life Prediction Method

An Energy-Based Axial Isothermal-Mechanical Fatigue Lifing Method

A Robust Optimization Technique for Calculating Scaling Coefficients in an Energy-Based Fatigue Life Prediction Method

Strain Rate and Loading Waveform Effects on an Energy-Based Fatigue Life Prediction for AL6061-T6

Damage Parameter Assessment for Energy Based Fatigue Life Prediction Methods

An Energy-Based Axial Isothermal-Mechanical Fatigue Lifing Method

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