Administered by the Department of Aerospace Engineering

## Undergraduate Study

The undergraduate courses in mechanics are intermediate between those in physics and mathematics and the professional and design courses of the several engineering curricula. In these courses the student is expected to acquire an understanding of the basic principles and analysis techniques pertaining to the static and dynamic behavior of rigid media, deformable solids, fluids, and gasses. Physical properties of engineering materials are studied in the classroom and are tested in the laboratory. General physical laws are given mathematical expression and are made suitable for use in the solution of specific problems in machine and structural design, and in the flow and measurement of fluids.

## Graduate Study

The department offers graduate programs that lead to the degrees master of science, master of engineering, and doctor of philosophy with major in engineering mechanics, and minor work to students taking major work in other departments.

The master of science degree requires a thesis and has strong research emphasis. The master of science degree is recommended for students who anticipate entering a doctoral program later. The master of engineering degree does not require either research credits or a thesis. The program is intended to give students additional instruction at the graduate level to better qualify them for advanced professional engineering work. By careful selection of electives and perhaps additional courses during the senior undergraduate year, students should be able to qualify for the master of engineering degree with an additional year of full-time study after receiving their baccalaureate degree in one of the several engineering curricula.

The master of engineering degree does require a creative component which will be obtained by registering for E M 599 Creative Component. A written report and an oral presentation will be given to the student’s graduate committee.

At least 30 credits of acceptable graduate work are required for both the master of science and the master of engineering degrees. For specific course, research, and creative component requirements, see the departmental Graduate Student Handbook.

The normal prerequisite to major graduate work is the completion of a curriculum substantially equivalent to that required of undergraduate students in engineering at this university. However, because of the diversity of interests in graduate work in engineering mechanics, it is possible for a student to qualify for graduate study even though undergraduate or prior graduate training has been in a discipline other than engineering—e.g., physics or mathematics.

## Courses

**Courses primarily for undergraduates:**

(3-0) Cr. 3. F.S.SS.

*Prereq: E M 274*

Plane stress, plane strain, stress-strain relationships, and elements of material behavior. Application of stress and deformation analysis to members subject to centric, torsional, flexural, and combined loadings. Elementary considerations of theories of failure, buckling.

(0-2) Cr. 1. F.S.

*Prereq: E M 324*

Experimental determination of mechanical properties of selected engineering materials. Experimental verification of assumptions made in 324. Use of strain measuring devices. Preparation of reports.

(Cross-listed with MAT E). (3-0) Cr. 3. S.

*Prereq: PHYS 112 or PHYS 222*

Radiography, ultrasonic testing, magnetic particle inspection, eddy current testing, dye penetrant inspection, and other techniques. Physical bases of tests, materials to which applicable, types of defects detectable, calibration standards, and reliability safety precautions.

(Cross-listed with MAT E). (0-3) Cr. 1. S.

*Prereq: Credit or enrollment in MAT E 362*

Application of nondestructive testing techniques to the detection and sizing of flaws in materials and to the characterization of material's microstructure. Included are experiments in hardness, dye penetrant, magnetic particle, x-ray, ultrasonic and eddy current testing. Field trips to industrial laboratories.

(2-2) Cr. 3. F.S.

*Prereq: E M 274*

Properties of fluids. Fluid statics. Kinematics and kinetics of fluid flow. Mass, momentum, and energy conservation laws; dimensional analysis; flow in pipes and channels. Selected laboratory experiments.

(Dual-listed with E M 517). (Cross-listed with AER E). (2-2) Cr. 3. Alt. F., offered even-numbered years.

*Prereq: E M 324; MAT E 273*

Introduction to fundamental concepts for force, displacement, stress and strain measurements for structures and materials applications. Strain gage theory and application. Full field deformation measurements with laser interferometry and digital image processing. Advanced experimental concepts at the micro- and nano-scale regimes. Selected laboratory experiments.

(3-0) Cr. 3. F.S.

*Prereq: E M 324*

Analysis of stresses, strains, and deflections. Torsion and bending of unsymmetrical members. Analysis of thick wall pressure vessels and shrink fit problems. Dynamic load effects, fatigue and fracture mechanics introduction. Work-strain energy methods.

(3-0) Cr. 3. S.

*Prereq: E M 324, MATH 266 or MATH 267*

Introduction of finite element analysis through applications to one-dimensional, steady-state problems such as elastic deformation, heat and fluid flow, consolidation, beam bending, and mass transport. Transient heat conduction and wave propagation. Two-dimensional triangular and quadrilateral elements. Plane problems of torsion, thermal and potential flow, stress analysis. Simple computer programs for one- and two-dimensional problems.

(Cross-listed with E E, M E). (2-2) Cr. 3. Alt. S., offered even-numbered years.

*Prereq: PHYS 221 and MATH 266 or MATH 267*

The basics of acoustic wave propagation in fluids with an emphasis on sound propagation in air. Topics include transmission and reflection of sound at a boundary; role of acoustic sources in directing sound fields; diffraction of sound around solid objects; reverberation of sound in a room; and the measurement of sound fields.

(Cross-listed with AER E). (3-0) Cr. 3. S.

*Prereq: E M 324, MATH 266 or MATH 267, PHYS 222*

Introduction to stress/strain, Hooke’s law, and elastic wave propagation in two dimensions in isotropic media. Ultrasonic plane-wave reflection and transmission; and simple straight-crested guided waves. Transducer construction, behavior, and performance. Simple signal analysis and discrete signal processing. The last few weeks of the course are devoted to case studies.

Cr. arr. Repeatable.

*Prereq: Permission of instructor*

Cr. arr. Repeatable.

*Prereq: Permission of instructor*

**Courses primarily for graduate students, open to qualified undergraduates:**

(3-0) Cr. 3. F.

*Prereq: MATH 385*

Introduction to Cartesian tensors as linear vector transformations. Kinematics of continuous deformations, Lagrangian and Eulerian descriptions of motion. Fundamental equations or balance laws of continuous media, linear and angular momentum balance. Conservation laws of momentum and energy. Introduction to constitutive equations of classical elastic solids and simple fluids. Formulations and solutions of some canonical problems.

(Cross-listed with AER E). (3-0) Cr. 3. F.

*Prereq: E M 324*

Theory of stress and strain, stress-strain relationships. Unsymmetrical bending, curved beams, shear center. Torsion of thin-walled noncircular sections. Equilibrium, compatibility equations. Airy stress functions. Membrane stresses in shells, thick-walled cylinders.

(3-0) Cr. 3. S.

*Prereq: E M 510*

Fundamental mechanics of linear elasticity, formulation and solution of simple elastostatic boundary value problems. Kinematics of small deformations, constitutive equations for isotropic and anisotropic media. Field equations for elastic solids, plane strain/plane stress and some classic analytical solutions such as Boussinesq, Hertz, Kirsch, Lamé, and Mitchell. Stress functions and potential methods and introduction to finite elements.

(Dual-listed with E M 417). (Cross-listed with AER E). (2-2) Cr. 3. Alt. F., offered even-numbered years.

*Prereq: E M 324; MAT E 273*

Introduction to fundamental concepts for force, displacement, stress and strain measurements for structures and materials applications. Strain gage theory and application. Full field deformation measurements with laser interferometry and digital image processing. Advanced experimental concepts at the micro- and nano-scale regimes. Selected laboratory experiments.

(3-0) Cr. 3. F.

*Prereq: MATH 385*

Propagation of bulk waves, surface waves, and guided waves in isotropic and anisotropic elastic media. Transmission and reflection of waves at plane and curved interfaces. Radiation of sources with application to ultrasonic transducer beam modeling. Elastic wave scattering from cracks and inclusions. Reciprocity principles and their use in the development of an ultrasonic measurement model. Characterization and measurement of material attenuation.

(Cross-listed with AER E). (3-0) Cr. 3. S.

*Prereq: E M 425, MATH 385*

Variational and weighted residual approach to finite element equations. Emphasis on two- and three-dimensional problems in solid mechanics. Isoparametric element formulation, higher order elements, numerical integration, imposition of constraints and penalty, convergence, and other more advanced topics. Use of two- and three-dimensional computer programs. Dynamic and vibrational problems, eigenvalues, and time integration. Introduction to geometric and material nonlinearities.

(3-0) Cr. 3. Alt. F., offered even-numbered years.

*Prereq: E M 514 or E M 516*

Introductory boundary element methods through plane problems. Singular integrals, Cauchy principal values, integral representations and boundary integrals in one dimension. Direct and indirect formulations. Plane potential and elastostatic problems. Higher order elements, numerical integration. Regularizations. Body forces and infinite regions. Specialized fundamental solutions, half-plane and axisymmetric problems. Diffusion and wave problems. Coupling with finite elements.

(Cross-listed with M E). (3-0) Cr. 3. Alt. S., offered odd-numbered years.

Vibrations of continuous systems. Nonlinear vibration phenomena, perturbation expansions; methods of multiple time scales and slowly-varying amplitude and phase. Characteristics of random vibrations; random processes, probability distributions, spectral density and its significance, the normal or Gaussian random process. Transmission of random vibration, response of simple single and two-degree-of-freedom systems to stationary random excitation. Fatigue failure due to random excitation.

(3-0) Cr. 3. Alt. S., offered even-numbered years.

*Prereq: E M 345, MATH 266 or MATH 267*

3-D kinematics and dynamics of particles and rigid bodies. Coordinate systems, calculus of variations. Lagrange's equations with constraints, modified Euler's equations, torque-free motion of rigid bodies in 3-D, moment equations with constraints.

(Cross-listed with M S E). (3-2) Cr. 4. S.

*Prereq: E M 324, MATH 385*

Principles of five basic NDE methods and their application in engineering inspections. Materials behavior and simple failure analysis. NDE reliability, and damage-tolerant design. Advanced methods such as acoustic microscopy, laser ultrasonics, thermal waves, and computed tomography are analyzed. Computer-based experiments on a selection of methods: ultrasonics, eddy currents, x-rays are assigned for student completion.

(Cross-listed with M E). (3-0) Cr. 3. Alt. F., offered irregularly.

*Prereq: E M 451*

Theoretical acoustics: wave propagation in fluids; acoustic radiation, diffraction and scattering; nonlinear acoustics; radiation force; cavitation; and ray acoustics.

(Cross-listed with AER E, M E, M S E). (3-0) Cr. 3. Alt. F., offered even-numbered years.

*Prereq: E M 324 and either MAT E 216 or MAT E 273 or MAT E 392. Undergraduates: Permission of instructor*

Materials and mechanics approach to fracture and fatigue. Fracture mechanics, brittle and ductile fracture, fracture and fatigue characteristics, fracture of thin films and layered structures. Fracture and fatigue tests, mechanics and materials designed to avoid fracture or fatigue.

(Cross-listed with M E). (3-0) Cr. 3. S.

*Prereq: EM 510 or EM 516 or EM 514*

Continuum thermodynamics and kinetics approaches to phase transformations. Phase field approach to stress- and temperature-induced martensitic transformations and twinning at the nanoscale. Nucleation and growth. Nanostructural evaluation. Analytical and numerical solutions. Surface stresses and energy. Surface-induced phase transformations. Large Strain formulation.

(Cross-listed with AER E, M S E). (3-0) Cr. 3. Alt. S., offered even-numbered years.

*Prereq: E M 324*

Mechanics of fiber-reinforced materials. Micromechanics of lamina. Macromechanical behavior of lamina and laminates. Strength and interlaminar stresses of laminates. Failure criteria. Stress analysis of laminates. Thermal moisture and residual stresses. Joints in composites.

(Cross-listed with AER E). (3-0) Cr. 3. Alt. S., offered odd-numbered years.

*Prereq: E M 378, E M 345*

Atmospheric circulations, atmospheric boundary layer wind, bluff-body aerodynamics, aeroelastic phenomena, wind-tunnel and full-scale testing, wind-load code and standards, effect of tornado and thunderstorm winds, design applications.

Cr. 1-4. Repeatable.

*Prereq: Permission of instructor*

Cr. 1-4. Repeatable.

*Prereq: Permission of instructor*

Cr. 1-4. Repeatable.

*Prereq: Permission of instructor*

Cr. 1-4. Repeatable.

*Prereq: Permission of instructor*

Cr. 1-4. Repeatable.

*Prereq: Permission of instructor*

Cr. arr. Repeatable.

**Courses for graduate students:**

Cr. 1-6. Repeatable.

*Prereq: Permission of instructor*

Cr. 1-6. Repeatable.

*Prereq: Permission of instructor*

Cr. 1-6. Repeatable.

*Prereq: Permission of instructor*

Cr. 1-6. Repeatable.

*Prereq: Permission of instructor*

Cr. 1-6. Repeatable.

*Prereq: Permission of instructor*

Cr. 1-6. Repeatable.

*Prereq: Permission of instructor*

Cr. 1-6. Repeatable.

*Prereq: Permission of instructor*

Cr. R. Repeatable.

*Prereq: Permission of DOGE (Director of Graduate Education), graduate classification*

One semester and one summer maximum per academic year professional work period.
Offered on a satisfactory-fail basis only.

Cr. arr. Repeatable.