About

Jon Rust is a Professor of Textile Engineering in the Textile Engineering, Chemistry and Science Department at the Wilson College of Textiles at North Carolina State University. He holds a B.S. in Mechanical Engineering and an M.S. in Fiber Science from Clemson University, and a Ph.D. in Fiber and Polymer Science from North Carolina State University. Dr. Rust has been a faculty member at NC State since 1985, serving in various roles including Department Head, Associate Head, and Director of Undergraduate Programs. His teaching primarily focuses on fiber and polymer science, fiber to yarn conversion, and senior design, and he has received multiple teaching awards. His research interests encompass the broad area of short staple yarn manufacturing, with past projects addressing process controls in drawframe autolevelling, novel sensing and control in carding, cotton fiber property measurement, roller-drafting, ginning technology, and fiber instrumentation. Current and future research projects aim to develop advanced roller-drafting and autoleveling technology, improve carding control and sliver quality, develop novel ginning technology, and enhance fiber measurement instrumentation. Dr. Rust has also worked extensively in textile industry process improvement projects and holds several patents related to fiber processing technologies.

Research topics

• Materials science
• Composite material
• Computer science
• Mechanics
• Mechanical engineering

Selected publications

• The development of an <i>in vitro</i> test method for predicting the abrasion resistance of textile and metal components of endovascular stent grafts

  Journal of Biomedical Materials Research Part B Applied Biomaterials · 2013-09-30 · 8 citations

  article

  Implantable endovascular stent grafts have become a frequent option for the treatment of abdominal and thoracic aneurysms. Given that such devices are permanent implants, the question of long-term biostability needs to be addressed. This article describes the development of an in vitro stent graft abrasion test method between the graft fabric and metal stent of an endovascular device. Three endpoints were established to determine the abrasion resistance between the fabric and stent surfaces after a predetermined number of abrasion cycles. During initial testing, two types of graft fabric materials, multifilament woven polyester fabric and monofilament woven polyester fabric, and two types of stent materials, laser cut nitinol stents and regular nitinol stent wire, were evaluated under dry and wet conditions. The results have shown that this test method is viable for testing the relative abrasion resistance of the components of endovascular stent grafts. The abrasion resistance of both fabrics was lower in a wet environment compared to being tested dry. Additionally, the multifilament polyester fabric had better abrasion resistance than the monofilament polyester fabric. The laser cut nitinol stent was more aggressive in creating holes and breaking yarns, while the regular nitinol stent wire caused a greater loss in fabric strength.

  PublisherDOI

• Assessment at North Carolina State University: Adapting to Change in the Workplace

  Research & Practice in Assessment · 2009-01-01 · 2 citations

  articleSenior author

  Effectively introducing change in job responsibilities, particularly when dealing with tenured faculty, can be challenging. More often, additions or changes to work tasks, such as integrating assessment procedures into existing work tasks, requires employees to apply new and/or more complex knowledge, skill, and ability. When compared to organizations practicing contemporary-type work methods, institutions practicing traditional-type work methods, such as those common to traditional university settings, can find adap tation to change particularly onerous. For example, tenured faculty may perceive introductions of new concepts or new terminology as substantive changes in their practice, even though the change is an introduction of new labels to their current practice or a systematization of a former practice. Consequently, the integration of new assessment procedures, as in this instance, can have a significant impact on faculty when learning to accommodate that change. Therefore, understanding why long-tenured employees may be particularly resistant to change in the workplace is important when adding assessment procedures to existing work responsibilities. To better understand faculty resistance to change and to help facilitate the change process, one can apply the integration of work adaptation theory. This paper reviews concepts included in the theory of work adaptation, with a focus on work adaptation theory developed by Petrini and Hultman. Petrini and Hultman cite six common beliefs that lie at the root of employee resistance to change and provide strategies for addressing such resistance. The six common beliefs include the follow ing: (a) One’s needs are currently met by the traditional methods already in place, (b) The change will make it more difficult to meet one’s needs, (c) The risks involved outweigh the possible benefits, (d) There is no basis for the change – it’s just another plan to get more work out of us with fewer resources, (e) The organization is mishandling the change, and (f ) The change will fail and go away. This paper addresses issues related to employee resistance when incorporating undergraduate assessment into the culture of a Research Extensive institution. Discussed are experiences in confronting Petrini and Hultman’s six beliefs when working with tenured employees as well as the application of strategies they suggest when addressing employee resistance to change. Furthermore, the six beliefs and strategies are applied as a means to clarify key findings with regard to the institution’s successful implementation of changes designed to improve student learning. Background The study institution is a state supported, research extensive, urban, and land-grant institution with an emphasis on science, engineering and technology. More than 29,000 students attend this institution, of which more than three quarters are undergraduates and almost nine of every ten are native state residents. Undergraduate assessment at this institution was initially a response to accreditation requirements and concerns for accountability from the state legislature. In its inception, assessment included a strong commitment to evidence-based decision-making with the intent to continuously improve programs. Assessmentbased program review began at this institution in the early 1990’s. At that time, program review was a process of reporting on the current state of a program, a “snap shot” of where the program was at some point in time. In 1997, Vice Provosts endeavored to recreate the cumbersome program review process making it more meaningful and incorporating student learning outcomes assessment as the vehicle to creating an environment of continuous improvement associated with program review. Thus, an ad-hoc committee of faculty from across the campus was organized to establish guidelines for program review with the following set of requirements: (a) to focus the process on continuous improvement, (b) to make the process sensitive to outside accreditation, and (c) to respect program autonomy. Three years later, with guidelines set, a second faculty led ad-hoc committee, the Committee on Undergraduate Program Review (CUPR),

  Publisher

• Fatigue Cracking Resistance of Fiber-Reinforced Asphalt Concrete

  Textile Research Journal · 2005-02-01 · 145 citations

  article

  The influence of fibers on the fatigue cracking resistance of asphalt concrete is investigated using fracture energy. Nylon, a popular facing yarn of carpets, is used for the actual recycled carpet fibers in asphalt pavement. The experimental program is designed with two phases: the single fiber pull-out test and the indirect tension strength test. Through pull-out tests of 15-denier single nylon fibers, the critical fiber embedded length is determined to be 9.2 mm. As for indirect tension strength tests, samples of asphalt concrete mixed with nylon fibers of two lengths, 6 and 12 mm, based on results of the pull-out tests (critical embedded length) and three volume fractions, 0.25, 0.5, and 1%, are prepared and tested. Asphalt concrete samples fabricated with fibers of 1% and 12 mm results in 85% higher fracture energy than non-reinforced specimens, showing improved fatigue cracking resistance. Although an optimized asphalt mix design with fibers has not been developed for this study, the increased fracture energy represents a potential for improving asphalt fatigue life, which may be facilitated through the use of recycled carpet fibers.

  PublisherDOI

• Mutual Support: CAC Programs and Institutional Improvement in Undergraduate Education

  Language and Learning Across the Disciplines · 2003-01-01 · 11 citations

  articleSenior author
  PublisherDOI

• Effects of Feed Sliver Moisture Content on Rotor Spinning Performance and Rotor Spun Yarn Properties

  Textile Research Journal · 2001-03-01 · 2 citations

  articleSenior author

  The aim of this study is to determine if high feed sliver moisture content will improve spinnability in rotor spinning without deteriorating yarn properties. Yarns are produced at a high rotor speed and low twist level. Two different count rotor spun yarns (18's and 24's) are spun from 100% cotton sliver at two different feed sliver moisture contents and two different opening roller speeds. Results indicate that high moisture content reduces the number of ends down, but increases yarn unevenness and the frequency of thin places, thick places, and neps. In addition, yarn elongation and work-to-break results are worse at high moisture content during spinning. In the case of fine yarn, a high opening roller speed tends to improve spinnability by reducing the number of ends down. Yarn evenness and thin and thick place results are also better. Overall, the results suggest that feed slivers with high moisture content can provide better spinning performance in rotor spinning. In other words, high moisture content can increase the production rate of open-end rotors, thus reducing the production cost of rotor spun yarns. However, a high moisture content also tends to deteriorate yarn evenness, increase the frequency of imperfections, and decrease yarn elongation.

  PublisherDOI

• Fabric Softness Classification Using Linear and Nonlinear Models

  Textile Research Journal · 2000-03-01 · 4 citations

  articleSenior author

  In this study, the authors use linear and nonlinear models and yarn parameters such as CV%, hairiness, and surface softness to classify the softness of knitted fabrics (T-shirts) for comparison to human subjective evaluations. All classification rates are verified with a leave-one-out cross-validation technique. The results show 20% misclassification when using a linear model to sort samples into two classes (low and high). When sorting into three classes, the misclassification is 30%. When sorting T-shirt softness into three classes using a tree modeling technique and the surface response average (SRA) and maximum peak-to-valley height (Ry), it is possible to match the human data at a 65% rate. When using surface response parameters and measured yam properties to sort T-shirt softness into three classes, with tree modeling it is possible to classify 91% of the samples accurately based on the human data.

  PublisherDOI

• Yarn Quality Indexing Using a Mechanical Stylus

  Textile Research Journal · 1999-06-01 · 9 citations

  articleSenior author

  Fabric hand, an important characteristic to the textile industry, is influenced by such fiber parameters as flexural rigidity and friction and by yarn parameters such as count, twist, CV%, hairiness, stiffness, and softness. This study deals primarily with predicting the softness of knitted T-shirts from yarn quality parameters. The work consists of a short literature review on the existing yam parameters as well as fabric hand evaluation and prediction techniques. The latest developments in measuring the roughness of textile material surfaces are, also covered. Using the surface profile as tested by the mechanical stylus surface analyzer (MSSA), developed at North Carolina State Uni versity, a novel yarn surface analysis parameter called the "surface response average" (SRA) is developed, along with a model for the fiber/stylus tip interaction. Ten T-shirts produced from ten different yarn samples are ranked based on their softness by a panel of judges. The yams used to make these T-shirts are tested by Uster III and MSSA, and standard roughness parameters are calculated. The results show no significant corre lation between standard roughness parameters and fabric softness. The correlation be tween hand and SRA is about -0.6, which suggests that a higher SRA corresponds to a softer fabric.

  PublisherDOI

• Effects of Cotton Fiber Blending and Processing on HVI Measurements—Part II

  Textile Research Journal · 1996-06-01 · 2 citations

  articleSenior author

  A review of literature about the effects of fiber property distributions and jaw place ment on HVI testing results is followed by a description of and results from an HVI computer simulator. A novel analysis of previously published data shows that mean and standard deviation of breaking load and elongation of a prepared test specimen vary with distance from the specimen clamp. Results of an HVI simulator based on theoretical considerations described here agree with experimental results. Placing jaws at different percent span lengths may introduce error into strength measurements by including a different subset of fibers with different fiber properties in each test. In addition, the MCI HVI air orifice used in strength tests may preferentially remove fiber crimp according to fiber elongation, which would result in an apparent increase in bundle strength.

  PublisherDOI

• Effects of Cotton Fiber Blending and Processing on HVI Measurements—Part I

  Textile Research Journal · 1996-06-01 · 16 citations

  article

  To obtain a better understanding of the relationships between fiber properties of the constituents of a cotton blend and the processes up to drawing, a review is presented of the effects of blending, orienting, and removing crimp from fibers on HVI test results. These effects are also explored experimentally by testing fibers from the same laydown in bale, card sliver, and drawn sliver form using HVI equipment. Apparent reductions in upper half mean and increases in short fiber content of card sliver may be due to the formation of hooks. Significant correlations between micronaire and fiber properties related to length that are present in bale samples are lacking in both card and drawn sliver samples, suggesting that there is at least one unmeasured factor in this analysis. Measured micronaire values are sensitive to crimp and fiber packing density. Differences in fiber property distributions can have significant effects on HVI measurements, and distributions of single fiber properties of a blend may differ dras tically from those of single bales. Strength tests of blended bundles may not include all constituents in the blend, because only the longest fibers are clamped in the jaws. Testing the fiber population at various stages of processing yields different information about fiber bundles.

  PublisherDOI

• Modeling and Simulation for Control in Carding

  Textile Research Journal · 1995-11-01 · 15 citations

  article

  The purpose of this work is to further study the transfer function model for carding introduced in a previous paper. Our goal is to develop mathematical and computational tools that will ultimately lead to the design of real-time controllers for carding. In this paper, we discuss a linear, time-variant version of the model presented for one carding group. We also present a reduced order, linear model and use it to build a linear estimator (observer) as part of a full-state feedback controller design. Computer sim ulations and experimental results are shown.

  PublisherDOI

Frequent coauthors

• P. R. Lord

  8 shared

• S. Peykamian

  3 shared

• P. L. Grady

  North Carolina State University

  2 shared

• M. Govindaraj

  2 shared

• L.F. Fryer

  North Carolina State University

  2 shared

• George Hodge

  2 shared

• Downey Allen

  1 shared

• Y. Ikiz

  North Carolina State University

  1 shared

Labs

• ResearchPI

Education

• Ph.D., Textile Engineering

  North Carolina State University

  2000

• M.S., Textile Engineering

  North Carolina State University

  1996

• B.S., Textile Engineering

  North Carolina State University

  1994

Awards & honors

• Gertrude Cox Award for Innovative Excellence in Teaching and…
• NCSU Distinguished Undergraduate Professor Award
• Wilson College of Textiles Board of Governors Award nominee…