Michael R. Hill
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View article: Adaptively remeshed multiphysical modeling of resistance forge welding with experimental validation of residual stress fields and measurement processes
Adaptively remeshed multiphysical modeling of resistance forge welding with experimental validation of residual stress fields and measurement processes Open
View article: Validation of Hole-Drilling Residual Stress Measurements in Workpieces of Various Thickness
Validation of Hole-Drilling Residual Stress Measurements in Workpieces of Various Thickness Open
Background A recent revision to the ASTM E837 standard for near-surface residual stress measurement by the hole-drilling method describes a new thickness-dependent stress calculation procedure applicable to “thin” and “intermediate” workpi…
View article: Outcomes and Conclusions from the 2022 AM Bench Measurements, Challenge Problems, Modeling Submissions, and Conference
Outcomes and Conclusions from the 2022 AM Bench Measurements, Challenge Problems, Modeling Submissions, and Conference Open
The Additive Manufacturing Benchmark Test Series (AM Bench) provides rigorous measurement data for validating additive manufacturing (AM) simulations for a broad range of AM technologies and material systems. AM Bench includes extensive in…
View article: Predicting residual stress fields using a multiphysical model with adaptive remeshing: Model construction and validation
Predicting residual stress fields using a multiphysical model with adaptive remeshing: Model construction and validation Open
View article: The Influence of Residual Stress on Fatigue Crack Growth Rates in Stainless Steel Processed by Different Additive Manufacturing Methods
The Influence of Residual Stress on Fatigue Crack Growth Rates in Stainless Steel Processed by Different Additive Manufacturing Methods Open
The properties and microstructure of Type 304L stainless steel produced by two additive manufacturing (AM) methods—directed energy deposition (DED) and powder bed fusion (PBF)—are evaluated and compared. Localized heating and steep tempera…
View article: Novel bulk triaxial residual stress mapping in an additive manufactured bridge sample by coupling energy dispersive X-ray diffraction and contour method measurements
Novel bulk triaxial residual stress mapping in an additive manufactured bridge sample by coupling energy dispersive X-ray diffraction and contour method measurements Open
View article: Assessment of residual stress in fracture mechanics coupons
Assessment of residual stress in fracture mechanics coupons Open
View article: Forensic Determination of Residual Stresses from Fracture Surfaces
Forensic Determination of Residual Stresses from Fracture Surfaces Open
Forensic engineering - the scientific examination and analysis of failed structures and parts relating to their failure or cause of damage. Real advances in experimental mechanics require innovative theoretical and analytical thinking to g…
View article: Measurements of residual stress in fracture mechanics coupons
Measurements of residual stress in fracture mechanics coupons Open
This paper describes measurements of residual stress in coupons used for fracture mechanics testing. The primary objective of the measurements is to quantify the distribution of residual stress acting to open (and/or close) the crack acros…
View article: Multiphysics Modeling of Resistance Forge Welding with Adaptive Remeshing and Experimental Validation of Residual Stress
Multiphysics Modeling of Resistance Forge Welding with Adaptive Remeshing and Experimental Validation of Residual Stress Open
View article: Assessment of crack face contact using a weight function with application to fatigue crack growth in residual stress bearing bodies
Assessment of crack face contact using a weight function with application to fatigue crack growth in residual stress bearing bodies Open
This work develops a method to predict crack face contact under linear elastic conditions with application to fatigue crack growth in a residual stress bearing body. Residual stress changes the shape of the crack faces in a cracked body an…
View article: Experimental study on the effect of the milling condition of an aluminum alloy on subsurface residual stress
Experimental study on the effect of the milling condition of an aluminum alloy on subsurface residual stress Open
Aluminum alloys used in monolithic parts for aerospace applications are subjected to distortion and residual stress (RS) generated by milling, affecting the product fatigue life. Particularly, the change in RS with depth ( z ) has a charac…
View article: Evaluation of residual stress reproducibility and orientation dependent fatigue crack growth in powder bed fusion stainless steel
Evaluation of residual stress reproducibility and orientation dependent fatigue crack growth in powder bed fusion stainless steel Open
The complex thermal gradients of additive manufacturing (AM) result in residual stress and distinctive grain morphologies that influence mechanical performance and contribute to concern regarding the fatigue properties of AM parts. In this…
View article: CCDC 2234260: Experimental Crystal Structure Determination
CCDC 2234260: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: Validation of on-line crack compliance data analysis methods for the residual stress intensity factor
Validation of on-line crack compliance data analysis methods for the residual stress intensity factor Open
Residual stress can significantly impact the fatigue crack growth rate (FCGR) observed in standard tests. In the present study, implementation of the on-line crack compliance (OLCC) method for determining the residual stress intensity fact…
View article: Novel Bulk Triaxial Residual Stress Mapping in an Additive Manufactured Bridge Sample by Coupling Energy Dispersive X-Ray Diffraction and Contour Method Measurements
Novel Bulk Triaxial Residual Stress Mapping in an Additive Manufactured Bridge Sample by Coupling Energy Dispersive X-Ray Diffraction and Contour Method Measurements Open
View article: Simulation-Based Investigation of the Distortion of Milled Thin-Walled Aluminum Structural Parts Due to Residual Stresses
Simulation-Based Investigation of the Distortion of Milled Thin-Walled Aluminum Structural Parts Due to Residual Stresses Open
Nowadays, aluminum components in aircraft are mainly found in the form of thin-walled monolithic structural parts of the internal fuselage and the wings as spars and ribs [1]. This is because these components have excellent material proper…
View article: Effects of residual stress on orientation dependent fatigue crack growth rates in additively manufactured stainless steel
Effects of residual stress on orientation dependent fatigue crack growth rates in additively manufactured stainless steel Open
Localized heating and resulting temperature gradients during additive manufacturing (AM) create significant residual stress that influences mechanical behavior, such as fatigue performance. To quantify residual stress effects on fatigue cr…
View article: Advances in Residual Stress Technology in Honor of Drew Nelson
Advances in Residual Stress Technology in Honor of Drew Nelson Open
View article: Measurement-driven, model-based estimation of residual stress and its effects on fatigue crack growth. Part 1: Validation of an eigenstrain model
Measurement-driven, model-based estimation of residual stress and its effects on fatigue crack growth. Part 1: Validation of an eigenstrain model Open
View article: Simulation based compensation techniques to minimize distortion of thin-walled monolithic aluminum parts due to residual stresses
Simulation based compensation techniques to minimize distortion of thin-walled monolithic aluminum parts due to residual stresses Open
Thin-walled milled monolithic aluminum workpieces are common in the aerospace industry, because of their advantages such as favorable material properties, established design methods, good machinability, known performance and reliable inspe…
View article: Measurement-driven, model-based estimation of residual stress and its effects on fatigue crack growth. Part 2: Fatigue crack growth testing and modeling
Measurement-driven, model-based estimation of residual stress and its effects on fatigue crack growth. Part 2: Fatigue crack growth testing and modeling Open
This paper assesses the accuracy of fatigue crack growth (FCG) predictions for high-strength aluminum samples containing residual stress (RS) and complex two-dimensional cracks subjected to constant amplitude load. FCG predictions use line…
View article: Near Surface Residual Stress Measurement Using Slotting
Near Surface Residual Stress Measurement Using Slotting Open
Background: There are various experimental measurement techniques used to measure residual stress and this work describes one such method, the slotting method, and its application to measure near surface residual stresses. Objective: This …
View article: The influence of residual stress on fatigue crack growth rates of additively manufactured Type 304L stainless steel
The influence of residual stress on fatigue crack growth rates of additively manufactured Type 304L stainless steel Open
View article: Interlaboratory Reproducibility of Contour Method Data in a High Strength Aluminum Alloy
Interlaboratory Reproducibility of Contour Method Data in a High Strength Aluminum Alloy Open
View article: The Effect of Bulk Residual Stress on Milling-Induced Residual Stress and Distortion
The Effect of Bulk Residual Stress on Milling-Induced Residual Stress and Distortion Open
Background Distortion arises during machining of metallic parts from two main mechanisms: 1) release of bulk residual stress (BRS) in the pre-form, and 2) permanent deformation induced by cut tools. Interaction between these mechanisms is …
View article: Simulation based investigation on the effect of the topology and size of milled thin-walled monolithic aluminum parts on the distortion due to residual stresses
Simulation based investigation on the effect of the topology and size of milled thin-walled monolithic aluminum parts on the distortion due to residual stresses Open
View article: Analysis of the Effect of Cryogenic Machining on the Quality of Milled Thin-walled Monolithic Aluminum Structural Parts
Analysis of the Effect of Cryogenic Machining on the Quality of Milled Thin-walled Monolithic Aluminum Structural Parts Open
View article: Residual stresses and microstructure within Allvac 718Plus laser powder bed fusion bars
Residual stresses and microstructure within Allvac 718Plus laser powder bed fusion bars Open
View article: Evaluation of Forging Process Induced Residual Stress in Aluminum Die Forgings
Evaluation of Forging Process Induced Residual Stress in Aluminum Die Forgings Open
Forging processes include various steps to attain favorable material properties such as heat treatment, rapid quench, cold work stress relieving, and artificial aging. These steps, however, also contribute to bulk residual stress. Excessiv…