... to characterize the fracture toughness of nonused coiled tubing, using nonstandard specimens due to difficulties with their small thickness and diameters. Different crack lengths and crack locations were tested to analyze the 2C 0 /W ratio and the influence of the longitudinal weld. The R curves obtained show...

...Tianbai Li; Haofeng Chen; Weihang Chen; James Ure This paper presents the ratchet limit analysis of a pipe with an axisymmetric circumferential crack in a mismatched weld by using the extended linear matching method (LMM). Two loading conditions are considered: (i) a cyclic temperature load...

...Rongsheng Li; Zengliang Gao; Yuebao Lei A global limit load solution is derived in this paper for embedded off-set elliptical cracks in a plate under combined tension and bending, based on the net-section collapse principle. The new limit load solution is validated using 3D elastic-perfectly...

...Xiangqiao Yan; Baoliang Liu This brief deals with crack(s) emanating from a hole in infinite plate subjected to uniform internal pressure. Such a crack problem is called a hole crack problem for short. By using a hybrid displacement discontinuity method (a boundary element method) proposed recently...

..., without a Lüders plateau. Also, the Lüders plateau was observed to decrease the crack opening stress ahead of the crack tip and thus the crack tip constraint. On the other hand, the presence of a Lüders plateau elevates the near tip plastic strain and stress triaxiality fields, thus promoting ductile...

...Xiangqiao Yan; Baoliang Liu This paper deals with crack(s) emanating from a hole in infinite elastic plate in tension. Such a crack problem is called a hole crack problem for short. By extending Buckner’s principle suited for a crack to a hole crack problem in infinite plate in tension, here...

... of Pipe Wall Thinning ,” ASME B&PV Sec. XI, Div. 1, ASME Code Case N-597-2. Moulin , D. , and Delliou , P. , 1996 , “ French Experimental Studies of Circumferentially Through-Wall Cracked Austenitic Pipes Under Static Bending ,” Int. J. Pressure Vessels Piping 0308-0161 , 65 , pp...

...A. Martin; S. Benhamadouche; G. Bezdikian; F. Beaud; F. Lestang Integrity evaluation methods for nuclear reactor pressure vessels (RPVs) under pressurized thermal shock (PTS) loading are applied by French Utility. They are based on the analysis of the behavior of relatively shallow cracks under...

... fracture for various lay-up and interface conditions. The study included interfaces of metal-wire to composite, composite to composite, and metal-wire to metal-wire. In addition, the lay-up orientations of metal-wire mats were varied between 0 deg and 90 deg. This study also examined the crack propagation...

... collapse. The reference volume concept in combination with m α -tangent method is used to estimate lower-bound limit loads of different components. Lower-bound limit loads obtained compare well with the nonlinear finite element analysis results for several typical configurations with/without crack...

...Yoichi Kayamori; Takehiro Inoue; Tetsuya Tagawa Experimental and analytical investigations into crack tip opening displacement (CTOD) were conducted to demonstrate the relationship between BS7448-CTOD and ASTM E1290-CTOD. The CTOD test results showed that ASTM-CTOD was occasionally much lower than...

...Yuh J. Chao; Cheng Wang; Yil Kim; Chi-Hui Chien Two-dimensional finite element analyses are performed to study the crack-tip constraint in an elastic-plastic, three point bend specimen under dynamic load. Both strain rate-independent and strain rate-dependent materials are considered to elucidate...

... quite high stress levels around the cavity regions in pressure vessels, which increase the risk of crack formation. 28 08 2009 08 10 2009 03 02 2010 03 02 2010 corrosion cracks photoelasticity pressure vessels pressure vessel corrosive defect photoelasticity three...

...Nam-Su Huh; Do-Jun Shim; Yeon-Sik Yoo; Suhn Choi; Keun-Bae Park This paper provides tractable solutions for elastic crack opening displacement (COD) of slanted through-wall cracks in plates and cylinders. The solutions were developed via detailed three dimensional elastic finite element analyses...

...Nam-Su Huh; Do-Jun Shim; Yeon-Sik Yoo; Suhn Chol; Keun-Bae Park 23 10 2009 28 10 2009 cracks This paper was retracted from Volume 131, Issue 6, Journal of Pressure Vessel and Technology because it is scheduled to be published in the April issue 2010. 2009 American...

...Sharif Rahman This paper presents a polynomial dimensional decomposition method for calculating the probability distributions of random crack-driving forces commonly encountered in elastic-plastic fracture analysis of ductile solids. The method involves a hierarchical decomposition...

...Chungpyo Hong; Yutaka Asako; Jae-Heon Lee The estimation of the gaseous leak flow rates through a narrow crack is important for a leak-before-break analysis as a method of nondestructive testing. Therefore, the methodology to estimate the gaseous leak flow rates in a narrow crack for a wide range...

...Jun Cui; Gordon K. Shek; Zhirui Wang A crack initiation and growth mechanism known as delayed hydride cracking (DHC) is a concern for Zr-2.5Nb alloy pressure tubes of CANada Deuterium Uranium or CANDU (CANDU is a trademark of the Atomic Energy of Canada Limited, Ontario, Canada) nuclear reactors...

...Samerjit Homrossukon; Sheldon Mostovoy; Judith A. Todd Hydrogen assisted cracking (HAC) has been investigated in a high strength 4140 steel and a low strength AISI-SAE grade 1022 steel (supplied by Amoco, Naperville, IL—now BP), charged at − 50 mA / cm 2 in 1N H 2 SO 4 + 25 mg / l As 2 O 3...

..., crack resistance, toughness, product form dependency, and metallurgical stability. At high temperatures, cylindrical and spherical components subjected to sustained external pressure may eventually buckle when creep deformation exceeds certain limits. To design against time-dependent creep buckling...