Internal stresses in PHOBOS and other triaxial bodies

Details Internal stresses in PHOBOS and other triaxial bodies Internal stresses in PHOBOS and other triaxial bodies

Oct 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982icar...52..136d&link_type=abstract

Icarus, vol. 52, Oct. 1982, p. 136-148.

Statistics

Applications

30

Astronomical Models, Natural Satellites, Phobos, Residual Stress, Tides, Triaxial Stresses, Asphericity, Deimos, Elastodynamics, Ellipsoids, Gravitational Effects, Orbital Elements, Planetary Geology, Rotation, Satellite Surfaces, Strain Distribution, Stress Distribution, Yield Strength, Mars, Satellites, Phobos, Interiors, Stress, Mathematical Models, Data, Shape, Tidal Effects, Rotation, Gravity Effects, Photographs, Deimos, Pallas Asteroid, Comparisons, Diagrams, History, Hypotheses

Scientific paper

The unusual dynamical behavior of Phobos, its strange appearance, and its mysterious network of grooves all make it an intriguing object. Geophysical studies, though, have been hampered by the lack of suitable theories applicable to nonspherical bodies. In this paper the Martian satellites are modeled as homogeneous, elastic triaxial ellipsoids subject to tidal, rotational, and self-gravitational stresses. A novel semianalytical treatment then gives the stress and strain fields throughout their interiors. Yield phenomena and their possible surface expressions are also investigated. The results indicate that Phobos and Deimos have always been stable with respect to tidal fracture or disruption, but that Phobos will probably break up before colliding with Mars. Applications of the new formulation to other nonspherical bodies in the solar system are also discussed.

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