SYMPOSIA PAPER Published: 01 January 1991
STP16859S

Effect of Residual Stress on the Curve of HY-100 Steel

Source

Fabrication processes in structural components can result in intended or inadvertent material behavior changes due to plastic deformation and residual stresses. In this study, the effect of a residual stress field caused by prior plastic deformation of a beam in four-point bending on the J-R curve of 12.7 mm (0.5 in.) thick specimens of HY-100 steel was investigated. Specimen blanks were deformed in four-point bending to two different levels of deflection prior to machining the starter notch. The resulting residual stress field in a companion test specimen was measured on side surfaces and through-the-thickness by a multiple exposure X-ray diffraction technique. J-testing was performed in three-point bending on undeformed specimens and the two deformed specimen sets using a modified multiple-specimen technique. A decrease in JQ and tearing modulus, T, with increasing specimen deflection was observed. The decrease in JQ was comparable to that observed previously in uniformly prestrained specimens.

Author Information

Gallant, AD
General Dynamics Corporation, Groton, CT
Bar-On, I
General Dynamics Corporation, Groton, CT
Tuler, FR
General Dynamics Corporation, Groton, CT
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Details
Developed by Committee: E08
Pages: 260–272
DOI: 10.1520/STP16859S
ISBN-EB: 978-0-8031-5172-7
ISBN-13: 978-0-8031-1418-0