Mohammad Mahinfalah, Ph.D.

Ph.D.

Engineering Mechanics

Iowa State University

1988

M.S.

Engineering Mechanics

Iowa State University

1985

B.S.

Mechanical Engineering

Iowa State University

1981

ASME Outstanding Student Section Advisor Award

2019

Falk Engineering Educator Award, MSOE

2012

American Society of Mechanical Engineers (ASME) : Fellow

2011

Acceleration in Kinematics

ASME International Mechanical Engineering Congress & Exposition  Denver, CO, November 11-17, 2011

Finite Element Verification of the Mathematical Modeling of Thermal Effects in Flexural Microcantilever resonators Dynamics

ASME International Mechanical Engineering Congress & Exposition  Vancouver, British Columbia, Canada, November 12- 18, 2010

Design of a low cost Apparatus for Torsion Testing

ASME International Mechanical Engineering Congress & Exposition  Montreal, Canada, November 14-20, 2014

Direct write and freeform fabrication apparatus and method

US20050288813A1

2005

A direct write or freeform fabrication apparatus and process for making a device or a three-dimensional object. By way of example the method comprises: (a) providing a target surface on an object-supporting platform; (b) operating a material deposition sub-system comprising a liquid deposition device for dispensing at least a liquid composition and a solid powder-dispensing device for dispensing solid powder particles to selected locations on the target surface; (c) operating a directed energy source for supplying energy to the dispensed liquid composition and the dispensed powder particles to induce a chemical reaction or physical transition thereof at the selected locations; and (d) moving the deposition sub-system and the object-supporting platform relative to one another in a plane defined by first and second directions to form the dispensed liquid composition and the dispensed powder particles into the device or object. An apparatus is also provided for carrying out this process.

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Senior Design Coordinator

M. Mahinfalah

2011 - 2012

Low and Hyper Velocity Impact of Silicon Carbide Particle Sandwich Composite

M. Mahinfalah (PI) and John Hurley

2005

Direct Write Technology

M. Mahinfalah (PI) and Bor Jang (co PI)

2004
Phase III, CNSE

Suspended Decoupler: A New Design of Hydraulic Engine Mount

Christopherson, J., Mahinfalah, M., Jazar, R.N.

2011

Because of the density mismatch between the decoupler and surrounding fluid, the decoupler of all hydraulic engine mounts (HEM) might float, sink, or stick to the cage bounds, assuming static conditions. The problem appears in the transient response of a bottomed-up floating decoupler hydraulic engine mount. To overcome the bottomed-up problem, a suspended decoupler design for improved decoupler control is introduced. The new design does not noticeably affect the mechanism's steady-state behavior, but improves start-up and transient response. Additionally, the decoupler mechanism is incorporated into a smaller, lighter, yet more tunable and hence more effective hydraulic mount design. The steady-state response of a dimensionless model of the mount is examined utilizing the averaging perturbation method applied to a set of second-order nonlinear ordinary differential equations. It is shown that the frequency responses of the floating and suspended decoupled designs are similar and functional. To have a more realistic modeling, utilizing nonlinear finite elements in conjunction with a lumped parameter modeling approach, we evaluate the nonlinear resorting characteristics of the components and implement them in the equations of motion.

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Effects of Nonlinearities on the Steady State Dynamic Behavior of Electric Actuated Microcantilever-based Resonators

Jazar, R.N., Mahinfalah, M., Mahmoudian, N., Rastgaar, M.A.

2009

This paper presents the dynamic behavior of microcantilever-based microresonators and compares their steady state behavior for polarized and nonpolarized systems at different levels of nonlinearities. A microcantilever, equipped with a time-varying capacitor, makes the microresonator system. The capacitor is activated by a constant polarization voltage, and an alternative actuating voltage. The partial differential equation of motion of the vibrating electrode can be reduced to a highly nonlinear parametric second order ordinary differential equation. The steady state behavior of the microresonator has been analyzed with and without polarization voltage. The main characteristic of the non-polarized model is explained by the stability of the system in parameter plane. A set of stability chart is provided to predict the boundary between the stable and unstable domains. Furthermore, the main characteristic of the polarized model is determination by the period-amplitude relationship of the system. Applying perturbation methods, analytical equations are derived to describe the frequency response of the system, which are suitable to be utilized in parameter study and design.

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Third-order systems: Periodicity conditions

Jazar, R.N., Mahinfalah, M., Mehri, B.

2009

Recently a third-order existence theorem has been proven to establish the sufficient conditions of periodicity for the most general third-order ordinary differential equation.

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