Reply [to “Discussion of paper by L. Shaw, I. Paul, and P. Henrikson, ‘Statistical models for the vertical deflection from gravity-anomaly models’”]

Shaw, Laxmi; Paul, I.; Henrikson, Paul

doi:10.1029/jb076i002p00629

Cited by 2 publications

(1 citation statement)

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“…tolerance of damages). A large number of researches on the impedance against damages of composite laminates were had done by many scholars [4] [5], which showed that the parameters which characterized the impedance against damages were always chosen from the dent depth or the internal delamination area caused by different impact energy and there was a significant inflecting relationship between energy and the parameters. Before the inflection point, there were merely matrix cracks and delamination damages while after the point, the expansion of the laminates' internal damage mainly consisted of fiber breaks instead of matrix cracks and delamination damages.…”

Section: Introductionmentioning

confidence: 99%

Compressive Strength of CCF300/QY8911 Composite Laminates with LVI Damage

Hong

Zhang

et al. 2012

AMR

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A series of low-velocity impact tests and residual compressive strength tests after impacts on CCF300/QY8911 composite materials were carried out to study the mechanism of compression failure of the laminates after low-velocity impact. The curves of impact energy verse dent depth and impact energy verse the damage area was obtained. And the residual compressive strength and stiffness after impact verse damage parameters were analyzed. The results showed that when the impact energy exceeded the inflection point, as the impact energy increased, the dent depth on the impacted surface of the laminates notably increased while the damage area of the internal layers merely increased slowly. If the impact energy was continued to increase, the expansion of the laminates' internal damage mainly consisted of fiber breaks. The main reason for the decrease in compressive performance of composite laminates was inside delamination between layers, while in the case in which impact energy exceeded the inflection point, there were no obvious changes in delamination damage area for different energy, so the residual compressive performance kept almost stable.

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Section: Introductionmentioning

confidence: 99%

Compressive Strength of CCF300/QY8911 Composite Laminates with LVI Damage

Hong

Zhang

et al. 2012

AMR

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Planar geodetic covariance functions

Meier¹

1981

Reviews of Geophysics

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In the last 20 years statistical methods have been applied in geodesy with considerable success, both in physical geodesy (least squares collocation, variance‐covariance propagation) and in geodetic measuring technique (error propagation and interpolation, inertial navigation, adjustment, diagnosis, and design of networks). The geodetic stochastic process is introduced per definition as the representation of a geophysical random field afflicted with observational errors, including the special cases of the (almost) error‐free field (physical‐geodetic process) and the pure error field (operational‐geodetic process). Geodesy is an approximation science, planar approximation being of great practical importance. It can be realized by projection onto a tangential plane to the earth’s surface and/or other planes of measurement and computation. The review treats the covariance functions of planar processes for different geodetic problems in the light of literature on the subject and under systematizing aspects—inter alia, gravity field, field of atmospheric refraction, error field; covariance estimation and propagation; ideal statistical structures as homogeneity, isotropy, axisymmetry, but also the physical, statistical, and geophysical significance of the prerequisites and solutions as well as problems that are still unsolved.

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Reply [to “Discussion of paper by L. Shaw, I. Paul, and P. Henrikson, ‘Statistical models for the vertical deflection from gravity-anomaly models’”]

Cited by 2 publications

References 0 publications

Compressive Strength of CCF300/QY8911 Composite Laminates with LVI Damage

Compressive Strength of CCF300/QY8911 Composite Laminates with LVI Damage

Planar geodetic covariance functions

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