• Evaluation of ls-dyna mat162 for modeling composite fastener joints for high rates of loading 

  Kona Ravi, Aswini; Bhasin, Akhil; Gomez, Leandro; Olivares, Gerardo; Gomez, Adrian; Keshavanarayana, Suresh R.; Pang, Jenna K.; Molitor, Matthew; Rassaian, Mostafa (American Institute of Aeronautics and Astronautics Inc., 2019-01)

  In the present work, the behavior of composite-fastener joints in bearing failure at dynamic stroke rates of 500 in/s, 300 in/s and 100 in/s has been evaluated through progressive damage analysis (PDA) material model in ...

• Refill friction stir spot welding of surface-treated aerospace aluminum alloys with faying-surface sealant 

  Boldsaikhan, Enkhsaikhan; Fukada, Shintaro; Fujimoto, Mitsuo; Kamimuki, Kenichi; Okada, Hideki (Elsevier, 2019-06)

  Refill friction stir spot welding (RFSSW) is a derivative of friction stir spot welding (FSSW). Unlike conventional FSSW, it does not leave behind an exit hole in the workpiece. Kawasaki Heavy Industries (KHI) developed a ...

• Crashworthiness by analysis: verifying FEA modeling capabilities by accident reconstruction 

  Zinzuwadia, Chandresh M.; Olivares, Gerardo; Ly, Hoa T.; Gomez, Luis (ASCE, 2018-11-15)

  A finite element (FE) model of a generic single-aisle narrow body transport aircraft was used for computational crash analysis to compare simulated deformations to those observed in the Turkish Airline Flight 1951 crash ...

• Research News, 2018 

  Office of Research (Wichita State University, 2018-01)

• Research News, 2017 

  Office of Research (Wichita State University, 2017-01-09)

• Injection repair for restoration of composite properties 

  Seneviratne, Waruna P.; Saathoff, Brandon L.; Palliyaguru, Upul R.; Hayes, B.S.; Dixon, D.G. (SAMPE, 2019-03)

  Resin injection is a less intrusive method of repair and does not require near the post processing of other composite repair methods. However, until recently this method of repair has not allowed the restoration of the ...

• Research News, 2016 

  Office of Research (Wichita State University, 2016-09-01)

• Learning robotic grasping strategy based on natural-language object descriptions 

  Rao, Bharath; Krishnan, Krishna K.; He, Hongsheng (IEEE, 2018-10)

  Given the description of an object's physical attributes, humans can determine a proper strategy and grasp an object. This paper proposes an approach to determine grasping strategy for an anthropomorphic robotic hand simply ...

• Automated scanning techniques using UR5 

  Lopez-Hawa, Homar; VanPelt, Alexander; Emmanuel, Suveen; Yihun, Yimesker S. (Hindawi, 2019-02-03)

  This study seeks to advance technologies pertaining to integration of low-cost collaborative robots to perform scanning operations where moderate accuracy is needed. Part inspection is an almost universal aspect of ...

• High rate testing of composite fastener joints with and without clamp-up 

  Gomez, Adrian; Keshavanarayana, Suresh R.; Castillo, Luis D.; Kona Ravi, Aswini; Bhasin, Akhil; Pang, Jenna K.; Molitor, Matthew; Rassaian, Mostafa (DEStech Publications Inc., 2018)

  The NASA Advanced Composites Consortium (ACC) High Energy Dynamic Impact (HEDI) group has been investigating experimentally the effects of testing speed and fastener clamp-up on the behavior of single lap shear composite ...

• An engineering approach to analyze damage initiation modes in tapered composite structures 

  Rao, Prabhakar M.; Palliyaguru, Upul R.; Gurvish, Mark R.; Seneviratne, Waruna P. (DEStech Publications Inc., 2018)

  In this work an engineering approach is demonstrated for analyzing damage initiation modes in tapered composite structures. The analysis methodology includes simulation of the non-linear static response of tapered composite ...

• Material state monitoring using embedded sensors for validating models for detecting process-induced damages in polymer composites 

  Seneviratne, Waruna P.; Tomblin, John S.; Liyanage, Shakya S.; Shah, Hemal B. (DEStech Publications Inc., 2018)

  Composite material cure recipes are based on manufacturer-recommended cure cycle inputs, which are developed as a result of various stochastic cure kinetics models during the development of resin formulation. The time, ...

• Defects characterization, damage mapping, and property evaluation of composites 

  Lua, Jim Y.; Sadeghirad, Alireza; Cui, Xiaodong; Karuppiah, Anand Vijay; Saathoff, Caleb; Seneviratne, Waruna P. (DEStech Publications Inc., 2018)

  The presence of voids in the composite laminates can reduce the mechanical properties in composites and these voids can become precursors in the activation of other failure modes such as delamination. Knowing the volume ...

• Progressive damage and failure prediction of interlaminar tensile specimen with initial fabrication induced defects 

  Cui, Xiaodong; Karuppiah, Anand Vijay; Pham, Dinh Chi; Lua, Jim Y.; Saathoff, Caleb; Seneviratne, Waruna P. (DEStech Publications Inc., 2018)

  An automatic solution process to evaluate the effects of fabrication induced defects in composite components is developed. The framework of this approach includes defects extraction from the X-ray computed tomography (CT) ...

• Automating structural modeling of composites enriched by X-ray micro-tomography and digital imaging data 

  Iliopoulos, Athanasios P.; Michopoulos, John G.; Steuben, John C.; Birnbaum, Andrew J.; Lua, Jim Y.; Karuppiah, Anand Vijay; Seneviratne, Waruna P.; Saathoff, Caleb (ASME, 2018)

  The manufacturing processes of Fiber Reinforced Polymers (FRPs) as composite materials are frequently prone to the creation of various types of undesired morphologies and defects. These can include layer waviness, inclusions, ...

• Chapter 39 -- Updating composite materials handbook-17 volume 5— ceramic matrix composites 

  Douglas Kiser, J.; David, Kaia E.; Davies, Curtis; Missri-Andrulonis, Rachael; Ashforth, Cindy (Wiley, 2018)

  This chapter discusses the updated version of CMH‐17 Volume 5—Ceramic Matrix Composites handbook released in 2002, which provides a more comprehensive overview of current Ceramic Matrix Composites (CMC) technology. Emphasis ...

• Refill Friction Stir Spot Joining for aerospace aluminum alloys 

  Boldsaikhan, Enkhsaikhan; Fukada, Shintaro; Fujimoto, Mitsuo; Kamimuki, Kenichi; Okada, Hideki; Duncan, Brent; Bui, Phuonghanh; Yeshiambel, Michael; Brown, Brian M.; Handyside, Alan Bruce (Springer, 2017)

  Refill Friction Stir Spot Joining (RFSJ) developed by Kawasaki Heavy Industries (KHI) is a derivative technology of friction stir spot welding for joining aerospace aluminum alloys. The aerospace aluminum alloys were ...

• Macrocyclic and peptidomimetic compounds as broad-spectrum antivirals against 3C or 3C-like proteases of picornaviruses, caliciviruses and coronaviruses 

  Chang, Kyeong-Ok; Kim, Yunjeong; Groutas, William C. (United States Patent and Trademark Office, 2016-04-12)

  Antiviral protease inhibitors, including macrocylic transition state inhibitors and peptidomimetics are disclosed, along with related antiviral compounds, and methods of using the same to treat or prevent viral infection ...

• End effector for forming swept friction stir spot welds 

  Burford, Dwight A. (United States Patent and Trademark Office, 2015-09-15)

  An apparatus includes a connector and is configured to mount to a machine having multiple axes of control. A control signal on the connector determines a path of a rotating tool holder.

• Latent isocynate derivatives useful for deactivating enzymes 

  Groutas, William C. (United States Patent and Trademark Office, 1990-05-29)

  Certain amino-acid derivatives are disclosed as effective inhibitors of human leukocyte elastase and therefore useful in preventing the imbalance of this proteolytic enzyme in vivo. The compounds specifically are derivatives ...

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