Static and dynamic force response of sands reinforced with discrete, randomly distributed fibers

Thesis/Dissertation · Fri Jan 01 04:00:00 EST 1988

OSTI ID:7248757

Maher, M H

Laboratory triaxial compression, resonant-column, and torsional shear tests were performed to determine both the static and dynamic stress-strain response of sands reinforced with discrete randomly distributed fibers, and to observe the influence of various fiber properties, soil properties, and test variables on soil response. In addition to the experimental program a theoretical model was developed, based on statistical theories of composites, to predict the fiber contribution to strength under static loads. Randomly distributed fiber inclusions significantly increased the ultimate strength and stiffness of sands under the action of static loads (triaxial compression tests). The increase in strength and stiffness was a function of sand granulometry and fiber properties. An increase in gradation and particle angularity of sands, and aspect ratio and modulus of fibers resulted in a higher contribution of fibers to strength. The sand-fiber composites had either a curved linear or a bilinear failure envelope with the break or transition to a linear envelope occurring at a threshold confining stress called the critical confining stress. Randomly distributed fiber inclusions influenced the dynamic behavior of sand with respect to shear modulus and damping.

• Research Organization: Michigan Univ., Ann Arbor, MI (USA)
• OSTI ID: 7248757
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603 -- Materials-- Properties
42 ENGINEERING
422000* -- Engineering-- Mining & Underground Engineering-- (1980-)
COMPOSITE MATERIALS
COMPRESSION STRENGTH
DYNAMIC LOADS
FAILURES
FIBERS
MATERIALS
MECHANICAL PROPERTIES
REINFORCED MATERIALS
SAND
SOIL-STRUCTURE INTERACTIONS
STATIC LOADS
STRESS ANALYSIS