Surface mobility is one of the most critical problems in design of a lunar roving vehicle, and tests of vehicle models in frictional soils were initiated early in our program. Tests on grades produced anomalous results, and it was found that conventional assumptions for predicting grade performance from results of testing at zero grade were as much as 20% in error. No simple trigonometric predictive relationship between grade angle and the angle of internal friction of the soil could be applied with certainty.Tests were run on a simplified interface consisting of a weighted grouser plate operating on frictional soil, and the results are presented in detail in the paper. Since it was determined that shear behavior does not follow common simple theory even at zero grade, this test series is now considered a single step in a comprehensive research study that will include tests of grouser plates and models in a variety of frictional soils. The goal of this program is development of a general expression for predicting grade capability from performance data obtained on level soil.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Shear Strength of Soils on Slopes


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE World Congress & Exhibition ; 1964



    Publication date :

    1964-01-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Shear strength of soils on slopes

    Jones, B.D. / Dewhirst, D.L. | Engineering Index Backfile | 1964


    Revegetation of Problem Soils on Road Slopes

    D. M. Parks / M. X. Nguyen | NTIS | 1984


    Dynamic Shear Strength of Loessial Soils and Volcanic Cohesive Soils

    Liao, H. / Yu, M. / Akira, T. et al | British Library Online Contents | 1998


    Landslide Evolution Rule of Cut Slopes in Expansive Soils

    Yang, He-ping / Xiao, Jie / Cheng, Bin et al. | ASCE | 2014


    Shear Strength Behavior of Coarse-Grained Saline Soils after Freeze-Thaw

    Wang, Songhe / Ding, Jiulong / Xu, Jian et al. | Springer Verlag | 2019