Joe L. Ratigan
Engineers at Hwy 44, Rapid City, SD
License number
South Dakota 2728
Expiration Date
Jul 31, 2017
Category
Professional Engineer
Type
Mechanical
Address
Address
8115 W Highway 44 West, Rapid City, SD 05772
Phone
(605) 394-6400
Personal information
See more information about Joe L. Ratigan at radaris.comName
Address
Phone
8115 W Highway 44, Rapid City, SD 57702
Rapid City, SD
8115 Highway 44, Rapid City, SD 57702
8115 Highway 44, Rapid City, SD 57702
Professional information
Method And Apparatus For Determining Tensile Strength
US Patent:
4444058, Apr 24, 1984
Filed:
May 28, 1982
Appl. No.:
6/382997
Inventors:
Joe L. Ratigan - Rapid City SD
Assignee:
The United States of America as represented by the United States
Department of Energy - Washington DC
Department of Energy - Washington DC
International Classification:
G01N 308
US Classification:
73834
Abstract:
A method and apparatus for determining the statistical distribution of apparent tensile strength of rock, the size effect with respect to tensile strength, as well as apparent deformation modulus of both intact and fractured or jointed rock. The method is carried out by inserting a plug of deformable material, such as rubber, in an opening of a specimen to be tested. The deformable material is loaded by an upper and lower platen until the specimen ruptures, whereafter the tensile strength is calculated based on the parameters of the test specimen and apparatus.