Patents by Inventor Chun-Jen Hsueh

Chun-Jen Hsueh has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Systems and methods for determining the effective toughness of a material and for implementing materials possessing improved effective toughness characteristics
    Patent number: 10190955
    Abstract: Systems and methods in accordance with embodiments of the invention determine the effective toughness of a given material, and also implement materials possessing improved effective toughness values. In one embodiment, a method of determining the effective toughness of a material includes: causing a crack to propagate through the material; where the relative constant velocity and the relative overall direction are prescribed and maintained for the duration of the propagation of the crack through the material; measuring the energy release rate of the crack as it propagates through the material; and defining the effective toughness of the material as the maximum value of the measured energy release rate.
    Type: Grant
    Filed: November 10, 2015
    Date of Patent: January 29, 2019
    Assignees: California Institute of Technology, The Board of Supervisors of Louisiana State University and Agricultural and Mechanical College
    Inventors: Md. Zubaer Hossain, Chun-Jen Hsueh, Kaushik Bhattacharya, Guruswami Ravichandran, Blaise Aurélien Bourdin
  • Measurement of fracture toughness of heterogeneous materials
    Patent number: 9903800
    Abstract: Methods for measuring the effective fracture toughness in a material are described. A rail and roller system are used to apply a gradual force to a specimen. The time-dependent force creates a steady fracture development that allows a camera to record the progressive fracture in the material. Mathematical methods can then be used to analyze the fracture progression and determine the effective fracture toughness.
    Type: Grant
    Filed: June 14, 2016
    Date of Patent: February 27, 2018
    Assignee: CALIFORNIA INSTITUTE OF TECHNOLOGY
    Inventors: Chun-Jen Hsueh, Kaushik Bhattacharya, Guruswami Ravichandran, Md Z. Hossain
  • MEASUREMENT OF FRACTURE TOUGHNESS OF HETEROGENEOUS MATERIALS
    Publication number: 20160370269
    Abstract: Methods for measuring the effective fracture toughness in a material are described. A rail and roller system are used to apply a gradual force to a specimen. The time-dependent force creates a steady fracture development that allows a camera to record the progressive fracture in the material. Mathematical methods can then be used to analyze the fracture progression and determine the effective fracture toughness.
    Type: Application
    Filed: June 14, 2016
    Publication date: December 22, 2016
    Inventors: Chun-Jen Hsueh, Kaushik Bhattacharya, Guruswami Ravichandran, Md Z. Hossain
  • Systems and Methods for Determining the Effective Toughness of a Material and for Implementing Materials Possessing Improved Effective Toughness Characteristics
    Publication number: 20160131564
    Abstract: Systems and methods in accordance with embodiments of the invention determine the effective toughness of a given material, and also implement materials possessing improved effective toughness values. In one embodiment, a method of determining the effective toughness of a material includes: causing a crack to propagate through the material; where the relative constant velocity and the relative overall direction are prescribed and maintained for the duration of the propagation of the crack through the material; measuring the energy release rate of the crack as it propagates through the material; and defining the effective toughness of the material as the maximum value of the measured energy release rate.
    Type: Application
    Filed: November 10, 2015
    Publication date: May 12, 2016
    Applicants: California Institute of Technology, Louisiana State University
    Inventors: Md. Zubaer Hossain, Chun-Jen Hsueh, Kaushik Bhattacharya, Guruswami Ravichandran, Blaise Aurélien Bourdin