Accession Number : AD0717019

Title :   The Effect of Preliminary Loading on the Mechanical Characteristics of Unidirectional Fiberglass Reinforced Plastics,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Yatsenko,V. P. ; Bilida,H. V. ; Dibenko,H. I.

Report Date : 26 OCT 1970

Pagination or Media Count : 8

Abstract : The existence of the Baushinger effect was examined for unidirectional glass reinforced plastic EFB-3S in the form of ring specimens. The material was loaded repeatedly up to 80 percent of ultimate tensile strength with the rate 8,000 kg/min., the value of ultimate tensile strength after preliminary loading was detd. in the 5th or in the 10th cycle resp. The starting value of ultimate tensile strength decreases 10,100 to 9,600 sq kg/cm and the value of elastic modulus increases from 465,000 to 490,000 sq kg/cm after preliminary loading. The observed changes do not exceed the interval of scattering of exptl values. (Author)

Descriptors :   (*REINFORCED PLASTICS, LOADS(FORCES)), TENSILE PROPERTIES, USSR

Subject Categories : Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE