Search Results - "Langer, Kristina"

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  1. 1

    Simulation-based optimization of laser shock peening process for improved bending fatigue life of Ti–6Al–2Sn–4Zr–2Mo alloy by Bhamare, Sagar, Ramakrishnan, Gokul, Mannava, Seetha R., Langer, Kristina, Vasudevan, Vijay K., Qian, Dong

    Published in Surface & coatings technology (01-10-2013)
    “…Laser shock peening (LSP) induced residual stresses significantly affect the high cycle fatigue behavior of certain metals and alloys. Residual stress…”
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    Journal Article
  2. 2

    An Active Learning Methodology for Efficient Estimation of Expensive Noisy Black-Box Functions Using Gaussian Process Regression by Meka, Rajitha, Alaeddini, Adel, Oyama, Sakiko, Langer, Kristina

    Published in IEEE access (2020)
    “…Estimation of black-box functions often requires evaluating an extensive number of expensive noisy points. Learning algorithms can actively compare the…”
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    Journal Article
  3. 3

    Prediction and characterization of residual stresses from laser shock peening by Brockman, Robert A., Braisted, William R., Olson, Steven E., Tenaglia, Richard D., Clauer, Allan H., Langer, Kristina, Shepard, Michael J.

    Published in International journal of fatigue (01-03-2012)
    “…► Laser shock processing (LSP) produces beneficial, but highly variable, residual stress fields. ► X-ray diffraction measurements of LSP residual stresses…”
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    Journal Article
  4. 4

    Machine Learning-Based Prediction and Optimisation System for Laser Shock Peening by Mathew, Jino, Kshirsagar, Rohit, Zabeen, Suraiya, Smyth, Niall, Kanarachos, Stratis, Langer, Kristina, Fitzpatrick, Michael E.

    Published in Applied sciences (01-04-2021)
    “…Laser shock peening (LSP) as a surface treatment technique can improve the fatigue life and corrosion resistance of metallic materials by introducing…”
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    Journal Article
  5. 5

    Corrections to "An Active Learning Methodology for Efficient Estimation of Expensive Noisy Black-Box Functions Using Gaussian Process Regression" by Meka, Rajitha, Alaeddini, Adel, Oyama, Sakiko, Langer, Kristina

    Published in IEEE access (2020)
    “…In the above article <xref ref-type="bibr" rid="ref1">[1] , errors related to symbols, equation numbers, and demonstration of Algorithm 2 were spotted. The…”
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    Journal Article
  6. 6

    Finite Element Analysis of Laser Peening of Thin Aluminum Structures by Langer, Kristina, Spradlin, Thomas J., Fitzpatrick, Michael E.

    Published in Metals (Basel ) (01-01-2020)
    “…Laser shock peening has become a commonly applied industrial surface treatment, particularly for high-strength steel and titanium components. Effective…”
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    Journal Article
  7. 7

    A finite element study of thermal relaxation of residual stress in laser shock peened IN718 superalloy by Zhou, Zhong, Gill, Amrinder S., Qian, Dong, Mannava, S.R., Langer, Kristina, Wen, Youhai, Vasudevan, Vijay K.

    “…The residual stresses in laser shock peened (LSP) Inconel 718 Ni-base superalloy and their thermal relaxation behavior were investigated based on…”
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    Journal Article
  8. 8

    Simulation of residual stress induced by a laser peening process through inverse optimization of material models by Amarchinta, Hemanth K., Grandhi, Ramana V., Clauer, Allan H., Langer, Kristina, Stargel, David S.

    Published in Journal of materials processing technology (01-11-2010)
    “…Laser peening (LP) is a surface enhancement technique that induces compressive residual stresses in the surface regions of metallic components to increase…”
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    Journal Article
  9. 9

    High Strain‐Rate Material Model Validation for Laser Peening Simulation by Langer, Kristina, Olson, Steven, Brockman, Robert, Braisted, William, Spradlin, Thomas, Fitzpatrick, Michael E.

    “…Finite element modeling can be a powerful tool for predicting residual stresses induced by laser peening; however the sign and magnitude of the stress…”
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    Journal Article
  10. 10

    A sequential weighted Laplacian‐regularized optimal design for response surface modeling of expensive functions with outliers: An application in linear elastic fracture mechanics by Martinez, Stanford, Alaeddini, Adel, Langer, Kristina

    “…There are several sequential and adaptive strategies designed to reduce the number of experiments in response surface methodology (RSM). However, most of the…”
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    Journal Article
  11. 11

    Thermal relaxation of residual stress in laser shock peened Ti–6Al–4V alloy by Zhou, Zhong, Bhamare, Sagar, Ramakrishnan, Gokul, Mannava, Seetha R., Langer, Kristina, Wen, Youhai, Qian, Dong, Vasudevan, Vijay K.

    Published in Surface & coatings technology (25-06-2012)
    “…Laser shock peening (LSP) induced residual stresses in Ti–6Al–4V, and their thermal relaxation due to short-term exposure at elevated temperatures are…”
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    Journal Article
  12. 12

    Experimental and Finite Element Simulation Study of Thermal Relaxation of Residual Stresses in Laser Shock Peened IN718 SPF Superalloy by Zhou, Zhong, Gill, Amrinder S., Telang, Abhishek, Mannava, Seetha R., Langer, Kristina, Vasudevan, Vijay K., Qian, Dong

    Published in Experimental mechanics (01-11-2014)
    “…An integrated experimental and modeling/simulation approach was developed to investigate and secure a quantified knowledge of the impact of high temperature…”
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    Journal Article
  13. 13

    Experimental validation of simulated fatigue life estimates in laser-peened aluminum by Spradlin, Thomas J, Grandhi, Ramana V, Langer, Kristina

    “…Purpose - The purpose of this paper is to develop and implement a structural fatigue life estimation framework that includes laser-peened (LP) residual…”
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    Journal Article
  14. 14

    Fatigue Response of Aluminum Aircraft Structure under Engineered Residual Stress Processing by Langer, Kristina, VanHoogen, Scott, Hoover, Jeffery

    Published in Journal of ASTM International (2008)
    “…Advanced surface treatment methods for imparting beneficial residual compressive stresses into fatigue-prone metallic components such as laser shock processing…”
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    Journal Article
  15. 15

    Multiscale dynamics in brittle fracture by Langer, Kristina

    Published 01-01-1998
    “…High-speed dynamic crack growth in brittle materials is an inherently unstable process, as evidenced by experimental observations concerning crack speed…”
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    Dissertation