DEVELOPMENT OF ANALYSIS TOOL FOR HIGH AND LOW VELOCITY ICE INDENTATION PROBLEMS

Award Information
Agency:
National Science Foundation
Branch
n/a
Amount:
$40,000.00
Award Year:
1987
Program:
SBIR
Phase:
Phase I
Contract:
n/a
Agency Tracking Number:
5240
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
Simtex Inc.
2711g Forest Drive, Kingwood, TX, 77339
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
() -
Business Contact:
Dr. Vitoon Vivatrat
President
() -
Research Institution:
n/a
Abstract
TWO MAJOR OBSTACLES CONFRONTED PREVIOUS ATTEMPTS TO ANALYZE FIELD ICE BEHAVIOR; NAMELY: THE LACK OF PROPER CONSTITUTIVE LAWS TO MODEL REALISTIC ICE BEHAVIOR, PARTICULARLY AT HIGH STRAIN-RATES, AND THE DIFFICULTY IN INCORPORATING LARGE ICE DEFORMATIONS IN THE ANALYSIS. THIS PROPOSAL PRESENTS A STUDY WHICH WILL IMPLEMENT AN ICE CONSTITUTIVE MODEL SUBROUTINE TO WORK IN CONJUNCTION WITH A LAGRANGE EXPLICIT FINITE-DIFFERENCE NUMERICAL SOLUTION SCHEME, WHICH IS CAPABLE OF HANDLING TRANSIENT, LARGE DISPLACEMENT AND LARGE STRAIN PROBLEMS. SPECIFIC OBJECTIVES OF THE PHASE I STUDY ARE: (1) DEVELOP A CONSISTENT SET OF METHODOLOGIES TO PREDICT THEICE BEHAVIOR AND FORCES ASSOCIATED WITH PENETRATION OF A RIGID SPHERICAL OR FLAT INDENTER INTO A FLAT ICE WALL AT HIGH VELOCITIES. THE CONSTITUTIVE MODEL WILL BE AN EXTENSION AND REFINEMENT OF TWO MODELS FOR LOW AND HIGH STRAIN-RATES, RESPECTIVELY, WHICH HAVE ALREADY BEEN PRESENTED BY THE PRINCIPAL INVESTIGATOR. (2) PRESENT COMPARISON OF PREDICTED INDENTATION BEHAVIOR AT HIGH AND LOW VELOCITIES. (3) DISCUSS GENERALIZATION OF METHODOLOGIES TO OTHER GEOMETRIES, VELOCITY RANGES, AND LARGER CONTACT AREAS, PARTICULARLY FOR CONDITIONS RELEVANT TO FIELD ICE LOADING ONOFFSHORE STRUCTURES.

* information listed above is at the time of submission.

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