Search Results - "ASHBAUGH, N. E"

Fatigue voids and their significance by SUNDER, R., PORTER, W. J., ASHBAUGH, N. E.

“…ABSTRACT Fractures from tests on 2014‐T6511 and 2024‐T3 test coupons under specially designed programmed loading reveal voids with distinct fatigue markings…”
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The role of air in fatigue load interaction by SUNDER, R., PORTER, W. J., ASHBAUGH, N. E.

“…ABSTRACT Natural fatigue crack formation and growth were studied in notched Al–Cu alloy coupons through high‐resolution SEM fractography. The experiments were…”
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Effect of sample thickness on local contact behavior in a flat-on-flat fretting fatigue apparatus by Hutson, A.L., Nicholas, T., Olson, S.E., Ashbaugh, N.E.

“…Thin plate samples of Ti–6Al–4V contacted on both sides with pads of the same material were used to simulate contact conditions in real structures subjected to…”
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Fatigue crack propagation parallel to fibers in unidirectionally reinforced SCS-6/Timetal®21S by John, R., Lackey, A.F., Ashbaugh, N.E.

“…Crack growth parallel to fibers in unidirectional reinforced SCS-6 /Timetal 21S is geometry independent, confirming the applicability of linear elastic…”
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The effect of stress ratio on fatigue crack growth rate in the absence of closure by SUNDER, R, PORTER, J, ASHBAUGH, N. E

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EXPERIMENTAL AND ANALYTICAL ESTIMATES OF FATIGUE CRACK CLOSURE IN AN ALUMINIUM-COPPER ALLOY PART II: A FINITE ELEMENT ANALYSIS by Ashbaugh, N. E., Dattaguru, B., Khobaib, M., Nicholas, T., Prakash, R. V., Ramamurthy, T. S., Seshadri, B. R., Sunder, R.

“…— A numerical investigation of the fatigue crack closure phenomenon has been performed by an elastic‐plastic finite element analysis. Computer software was…”
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EXPERIMENTAL AND ANALYTICAL ESTIMATES OF FATIGUE CRACK CLOSURE IN AN ALUMINIUM-COPPER ALLOY PART I: LASER INTERFEROMETRY AND ELECTRON FRACTOGRAPHY by Ashbaugh, N. E., Dattaguru, B., Khobaib, M., Nicholas, T., Prakash, R. V., Ramamurthy, T. S., Seshadri, B. R., Sunder, R.

“…— Results of an experimental estimation of the crack closure stress, using electron fractography and laser interferometry for CT specimens of an…”
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An integral-equation solution for a bounded elastic body containing a crack: Mode I deformation by Rudolphi, T. J., Ashbaugh, N. E.

“…An integral-equation solution is developed for the two-dimensional problem of a traction-free crack in a bounded, linearly elastic, isotropic medium subjected…”
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Multi-Mechanism Synergy in Variable-Amplitude Fatigue by Sunder, R, Ashbaugh, NE, Porter, WJ, Rosenberger, AH

“…Fractographic studies on Al alloys and a nickel-base super-alloy point to the combined action of three major load-interaction mechanisms in controlling crack…”
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Constant K I crack-propagation test specimens by Ahmad, J., Ashbaugh, N. E.

“…Circular ring-shaped crack-propagation test-specimen geometries containing single radial cracks have been analyzed, with diametrically opposite tensile and…”
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Stress-free edge effects on the transverse response of a unidirectional metal matrix composite by Kroupa, Joseph L., Ashbaugh, Noel E.

“…In using a representative volume element of a unidirectional composite, two out-of-plane boundary conditions represent edge and internal regions of a…”
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The effect of stress ratio on fatigue crack growth rate in the absence of closure by Sunder, R, Porter, J, Ashbaugh, N E

“…A fractographic study was performed on Al-alloy fatigue fracture surfaces produced by programmed load sequences. The load sequences included steps of constant…”
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Effect of sample thickness on local contact behavior in a flat-on-flat fretting fatigue apparatus by Hutson, A L, Nicholas, T, Olson, S E, Ashbaugh, N E

“…Thin plate samples of Ti-6Al-4V contacted on both sides with pads of the same material were used to simulate contact conditions in real structures subjected to…”
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Experimental and analytical estimates of fatigue crack closure in an aluminium-copper alloy. II. A finite element analysis by Ashbaugh, N E, Dattaguru, B, Khobaib, M, Nicholas, T, Prakash, R V, Ramamurthy, T S, Seshadri, B R, Sunder, R

“…A numerical investigation of the fatigue crack closure phenomenon has been performed by an elastic-plastic finite element analysis. Computer software was…”
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Experimental and analytical estimates of fatigue crack closure in an aluminium-copper alloy. I. Laser interferometry and electron fractography by Ashbaugh, N E, Dattaguru, B, Khobaib, M, Nicholas, T, Prakash, R V, Ramamurthy, T S, Seshadri, B R, Sunder, R

“…Results of an experimental estimation of the crack closure stress, using electron fractography and laser interferometry for CT specimens of 2014-T651…”
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Thermal Residual Stress Relaxation in Powder Metal IN100 Superalloy by Buchanan, DJ, John, R, Ashbaugh, NE

“…Relaxation of shot peen induced compressive residual stresses due to thermal exposure was measured using X-ray diffraction. The material used in this study was…”
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Bridging fiber stress distribution during fatigue crack growth in [0] sub 4 SCS-6/Timetal 21S by John, R, Stibich, P R, Johnson, D A, Ashbaugh, N E

“…Authors attempted to develop a procedure to determine the bridging fiber stress distribution from crack opening displacements during crack growth in SiC fiber…”
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Bridging fiber stress distribution during fatigue crack growth in [0] 4 SCS-6/timetal®21S by John, Reji, Stibich, Paul R., Johnson, David A., Ashbaugh, Noel E.

“…A procedure was developed to determine the bridging fiber stress distribution from crack opening displacements measured during crack growth. The bridging fiber…”
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