Determination of residual stress intensity factor in the compact tension coupon

Olson, Mitchell D.; Hill, Michael R.

doi:10.1016/j.engfracmech.2012.03.009

Cited by 8 publications

(1 citation statement)

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“…The reference Z(a) is also applicable for a small strain gage size, which was reasonable for the 1T geometry and gage size here (gage length is 0.05W'), but was not reasonable for the 0.5T geometry (gage length is 0.1W'). An elastic correction was developed (using finite element analysis) to account for the larger strain gage size on the 0.5T blank that favorable compares to influence functions developed for C(T) specimens currently available [19]. The derivative of strain with respect to crack length was computed from the data using a moving five-point quadratic polynomial, with slope evaluated numerically at the middle point.…”

Section: Experimental Methodsmentioning

confidence: 99%

Study of Residual Stresses in Compact Tension Specimens Fabricated from Weld Metal

Kerr¹,

Hill²,

Olson³

2013

CORROSION

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This paper describes a preliminary investigation into the residual stress levels in welded nickel alloy compact tension specimens used in stress corrosion cracking (SCC) growth rate experiments. Results from this work document the effect of specimen size and location on residual stress profiles, the methodology outlined in this paper is appropriate to determine the degree to which residual stresses affect crack growth measurements made in coupons containing welds. Slitting method residual stress measurements (Hill Engineering and UC Davis) and finite element weld simulation (US Nuclear Regulatory Commission) have been conducted in order to evaluate both the residual stress intensity factor and residual stress profiles for two compact tension coupon blanks containing welds. The two compact tension coupon blanks were provided by Argonne National Lab (ANL) and are similar to coupons used in on-going SCC studies in weld metal. The experimental data and finite element results are in reasonable agreement, showing similar trends in calculated residual stress profiles.

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Section: Experimental Methodsmentioning

confidence: 99%