C. A. Rogers

Augusta University

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

Liang Chen

Nanjing University

Zaffir Chaudhry

University of California, Irvine

Furong Sun

Virginia Tech

Chris R. Fuller

Issues Research

Liviu Librescu

Virginia Tech

Jeffrey S. N. Paine

Dynamic Structures and Materials (United States)

Jun Jia

National University of Defense Technology

Ohseop Song

Chungnam National University

F. Lalande

Aix-Marseille Université

Mark W. Lin

University of Alabama in Huntsville

Cooperative Institutions

Virginia Tech

Commonwealth Scientific and Industrial Research Organisation

University of Alabama at Birmingham

University of Bristol

Alabama State University

European Association of Urology

NIHR Bristol Cardiovascular Biomedical Research Unit

Bristol Royal Infirmary

University Hospitals Bristol NHS Foundation Trust

University of Illinois Urbana-Champaign

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Design of spur gears generated with pinion cutters

Mechanism and Machine Theory (1990)

C. A. Rogers H. H. Mabie Charles F. Reinholtz

Pinion

10.1016/0094-114x(90)90005-5

Cite

Citations (27)

Integration and Design of Piezoceramic Elements in Intelligent Structures

Journal of Intelligent Material Systems and Structures (1995)

Su-Wei Zhou Liang Chen C. A. Rogers

The design of induced strain elements (actuators) is a comprehensive issue, involving not only the materials and geometry of the elements, but also the behaviors of the coupled host structures. In particular, the design of the active elements is essentially related to the prediction of induced strain or stress in the elements. A high stress or strain level in the actuators is useful to excite host structures; however, degradation or fatigue damage of the actuators may take place at the same time. This paper presents a dynamic analytical approach for the design and integration of active piezoceramic (PZT) patch elements locally coupled with host structures. Several critical design issues are addressed. These issues include the determination of the actuator dynamic outputs, the prediction of energy conversion efficiency, the estimation of system power requirement, and the limitation of induced alternate peak stress. A coupled electro-mechanical analytical model was developed to reveal the inherent connections among these issues. Both the mechanical stress behavior and the thermal stress characteristics of the PZT patch elements were investigated. A system power consumption-based model was developed to estimate the temperature and thermal stress distribution of the elements. The attention in parametric design was directed to the thickness and location of the elements. A simply-supported thin plate with surface-bonded PZT patches was built and tested to directly measure the induced dynamic strain of the PZT element so that the prediction accuracy and ability of the design model has been validated.

10.1177/1045389x9500600601

Cite

Citations (47)

Second international conference on intelligent materials: Proceedings

C. A. Rogers Gordon G. Wallace

This conference contains papers on both intelligent materials and intelligent structures. These materials and structures have the ability to modify both their shape and properties in response to the thermomechanical environment. Intelligent materials can be used as both actuators and sensors. Separate abstract were prepared for most papers in this volume.

Source

Cite

Citations (0)

Qualitative impedance-based nondestructive evaluation

F. Lalande C. A. Rogers

A new qualitative non-destructive evaluation (NDE) sensor system to perform in-situ on-line monitoring of critical sections of structures and to provide a warning in the event of damage is the focus of this paper. The proposed technique described in this paper utilizes small PZT patches to provide high-frequency excitation, typically in the high kHz range, to the structure being monitored. At such high frequencies, the response is dominated by local modes and incipient damage like small cracks, loose connections, and delaminations, produce measurable changes in the vibration signature. The high frequencies also limit the actuation/sensing area. The effect of excitation frequency, geometry, material properties, structural joints, etc., on the size of the sensing/actuation area is still under investigation, but it is the authors observation that the sensing area, as a minimum, extends to the boundaries of the solid member to which the PZT is bonded. This limited sensing area helps to isolate the effect of damage on the signature from other far-field changes in mass-loading, stiffness and boundary conditions. The insensitivity to far-field boundary conditions comes at the cost of a limited sensing area. Therefore, this technique will be most useful in identifying and tracking damage in those areas ofmore » structures where high structural integrity must be assured at all times.« less

Signature (topology)

Source

Cite

Citations (0)

Modification of piezoelectric vibratory gyroscope resonator parameters by feedback control

IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control (1998)

Philip W. Loveday C. A. Rogers

A method for analyzing the effect of feedback control on the dynamics of piezoelectric resonators used in vibratory gyroscopes has been developed. This method can be used to determine the feasibility of replacing the traditional mechanical balancing operations, used to adjust the resonant frequency, by displacement feedback and for determining the velocity feedback required to produce a particular bandwidth. Experiments were performed on a cylindrical resonator with discrete piezoelectric actuation and sensing elements to demonstrate the principles. Good agreement between analysis and experiment was obtained, and it was shown that this type of resonator could be balanced by displacement feedback. The analysis method presented also is applicable to micromachined piezoelectric gyroscopes.

Piezoelectric accelerometer

10.1109/58.726445

Cite

Citations (31)

One-Dimensional Thermomechanical Constitutive Relations for Shape Memory Materials

Journal of Intelligent Material Systems and Structures (1997)

Liang Chen C. A. Rogers

The use of the thermoelastic martensitic transformation and its reverse transformation has recently been proposed and demonstrated for several active control applications. However. the present constitutive models have lacked several important fundamental concepts that are essential for many of the proposed intelligent material system applications such as shape memory hybrid composites. A complete, unified, one-dimensional constitutive model of shape memory materials is developed and presented in this paper. The thermomechanical model formulation herein will investigate important material characteristics involved with the internal phase transformation of shape memory alloys. These characteristics include energy dissipation in the material that governs the damping behavior, stress-strain-temperature relations for pseudoelasticity, and the shape memory effect. Some numerical examples using the model are also presented.

Thermoelastic damping

Pseudoelasticity

Smart material

Diffusionless transformation

10.1177/1045389x9700800402

Cite

Citations (207)

VE20: Robotic assisted re-do partial nephrectomy and partial adrenalectomy in a patient with von Hippel Lindau disease

European Urology Supplements (2014)

Prabhat Sharma Kirsten Janosek-Albright Ravi Barod C. A. Rogers

Von Hippel–Lindau disease

10.1016/s1569-9056(14)50137-6

Cite

Citations (0)

A Macroscopic Phenomenological Formulation for Coupled Electromechanical Effects in Piezoelectricity

Journal of Intelligent Material Systems and Structures (1993)

X.D. Zhang C. A. Rogers

A phenomenological formulation of polarization reversal of piezoelectric materials s proposed based on the dynamics of domain switching. This formulation provides a method to describe the hysteresis in piezoelectricity as well as in electromagnetics. It is shown that a good ap proach to describe the nonlinear induced strain-field behavior and electromechanical hysteresis in piezoelectricity is by combining the macroscopic phenomenological aspects with the microscopic naterial properties. A one-dimensional thermo-electro-mechanical constitutive model for piezo ceramics which undergo polarization reversal is presented using a continuum mechanics approach. This model is based on thermodynamic principles and reflects the essence of the electromechanical behavior of piezoceramics in a simple form. It is illustrated that this theory can describe the elec romechanical behavior of piezoceramics simply and reasonably well.

Phenomenological model

Hysteresis

Electromagnetics

10.1177/1045389x9300400303

Cite

Citations (53)

Static Aeroelasticity Behavior of Adaptive Aircraft Wing Structures Modelled as Composite Thin-Walled Beams

Dong Hun Song Liviu Librescu C. A. Rogers

The static aeroelastic behavior of adaptive swept- forward wing aircraft modelled as thin-walled beams and incorporating piezoelectric effects is investigated. Based on the direct and converse piezoelectric effects, the system of piezoelectric sensors and actuators, conveniently located on the wing, yields a control of both aeroelastic divergence instability and, in the sub-critical speed range, of aeroelastic lift distribution. The numerical illustrations reveal the great capabilities of adaptive swept-forward wings to control their static aeroelastic behavior and, as a result, to fully exploit the advantages offered by such a wing aircraft configuration.

Aeroelasticity

Fuselage

Source

Cite

Citations (5)

One-Dimensional Thermomechanical Constitutive Relations for Shape Memory Materials

Journal of Intelligent Material Systems and Structures (1990)

Liang Chen C. A. Rogers

The use of the thermoelastic martensitic transformation and its reverse transformation has recently been proposed and demonstrated for several active control ap plications. However, the present constitutive models have lacked several important funda mental concepts that are essential for many of the proposed intelligent material system ap plications such as shape memory hybrid composites. A complete, unified, one-dimensional constitutive model of shape memory materials is developed and presented in this paper. The thermomechanical model formulation herein will investigate important material characteristics involved with the internal phase transformation of shape memory alloys. These characteristics include energy dissipation in the material that governs the damping behavior, stress-strain-temperature relations for pseudoelasticity, and the shape memory effect. Some numerical examples using the model are also presented.

Thermoelastic damping

Pseudoelasticity

Smart material

Diffusionless transformation

10.1177/1045389x9000100205

Cite

Citations (1,166)