Stress Recovery in Composite Laminates

Geometrically Nonlinear Stress Recovery in Composite Laminates Subjected to Dynamic Loading

55th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference ◽

10.2514/6.2014-1202 ◽

2014 ◽

Author(s):

Timothy Hartman ◽

Michael W. Hyer ◽

Scott Case

Keyword(s):

Dynamic Loading ◽

Composite Laminates ◽

Stress Recovery ◽

Geometrically Nonlinear ◽

Nonlinear Stress

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Stress Recovery in Composite Laminates Including Geometrically Nonlinear and Dynamic Effects

AIAA Journal ◽

10.2514/1.j054700 ◽

2016 ◽

Vol 54 (8) ◽

pp. 2521-2529 ◽

Cited By ~ 4

Author(s):

Timothy B. Hartman ◽

Michael W. Hyer ◽

Scott W. Case

Keyword(s):

Composite Laminates ◽

Stress Recovery ◽

Geometrically Nonlinear ◽

Dynamic Effects

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Geometrically Nonlinear Stress Recovery in Composite Laminates

AIAA Journal ◽

10.2514/1.j051407 ◽

2012 ◽

Vol 50 (5) ◽

pp. 1156-1168 ◽

Cited By ~ 2

Author(s):

Timothy B. Hartman ◽

Michael W. Hyer ◽

Scott W. Case

Keyword(s):

Composite Laminates ◽

Stress Recovery ◽

Geometrically Nonlinear ◽

Nonlinear Stress

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Through-the-thickness stress distributions near edges of composite laminates using stress recovery scheme and third order shear and normal deformable theory

Composite Structures ◽

10.1016/j.compstruct.2015.05.041 ◽

2015 ◽

Vol 131 ◽

pp. 397-413 ◽

Cited By ~ 9

Author(s):

P.H. Shah ◽

R.C. Batra

Keyword(s):

Composite Laminates ◽

Stress Recovery ◽

Stress Distributions ◽

Third Order ◽

Recovery Scheme

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TEM investigations of surface residual stress relaxation in A12O3 and Al2O3-SiC nanocomposite

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100170876 ◽

1994 ◽

Vol 52 ◽

pp. 628-629

Author(s):

J. Fang ◽

H. M. Chan ◽

M. P. Harmer

Keyword(s):

Residual Stress ◽

Single Phase ◽

Stress Relief ◽

Stress Recovery ◽

Surface Residual Stress ◽

Microscopic Mechanism ◽

Sic Particles ◽

Annealing Procedure ◽

The Difference ◽

Nano Size

It was Niihara et al. who first discovered that the fracture strength of Al2O3 can be increased by incorporating as little as 5 vol.% of nano-size SiC particles (>1000 MPa), and that the strength would be improved further by a simple annealing procedure (>1500 MPa). This discovery has stimulated intense interest on Al2O3/SiC nanocomposites. Recent indentation studies by Fang et al. have shown that residual stress relief was more difficult in the nanocomposite than in pure Al2O3. In the present work, TEM was employed to investigate the microscopic mechanism(s) for the difference in the residual stress recovery in these two materials.Bulk samples of hot-pressed single phase Al2O3, and Al2O3 containing 5 vol.% 0.15 μm SiC particles were simultaneously polished with 15 μm diamond compound. Each sample was cut into two pieces, one of which was subsequently annealed at 1300° for 2 hours in flowing argon. Disks of 3 mm in diameter were cut from bulk samples.

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