A more realistic thermal shock analysis of a radially multicracked thick-walled cylinder

Perl, M.; Ashkenazi, A.

doi:10.1016/0013-7944(92)90057-l

Cited by 11 publications

(3 citation statements)

References 12 publications

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“…By letting the coating and substrate have the same material constants and Bi ! 1, a series of runs were performed to duplicate various results obtained by Oliveira and Wu (1987), which was obtained via method of weight function and by Perl and Ashkenazi (1992), which was obtained also by FE method. Most of the results were found to be in excellent agreement with those in references (see Table 1).…”

Section: Finite Element Modelmentioning

confidence: 99%

“…Multiple crack problems in a plate under thermal loading were considered recently in literature (Bahr et al, 1988;Rizk, 2003). The single crack and multiple cracks problem of thermal shock fracture of homogenous thick-walled cylinders has been widely investigated, due to its importance to the design and manufacturing of such structural components as the pressure vessels, piping subjected to thermal transients (Oliveira and Wu, 1987;Perl and Ashkenazi, 1992;Chen and Kuo, 1994). In many modern applications, coatings are intentionally deposited on the underlying substrate to enhance some specific surface characteristics, e.g., strength, corrosion and wear resistance.…”

Section: Introductionmentioning

confidence: 99%

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Multiple axial cracks in a coated hollow cylinder due to thermal shock

Chen¹,

Zhang²,

Chen³

et al. 2006

International Journal of Solids and Structures

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The transient thermal stress problem of an inner-surface-coated hollow cylinder with multiple pre-existing surface cracks contained in the coating is considered. The transient temperature, induced thermal stress, and the crack tip stress intensity factor (SIF) are calculated for the cylinder via finite element method (FEM), which is exposed to convective cooling from the inner surface. As an example, the material pair of a chromium coating and an underlying steel substrate 30CrNi2MoVA is particularly evaluated. Numerical results are obtained for the stress intensity factors as a function of normalized quantities such as time, crack length, convection severity, material constants and crack spacing.

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Section: Finite Element Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multiple axial cracks in a coated hollow cylinder due to thermal shock

Chen¹,

Zhang²,

Chen³

et al. 2006

International Journal of Solids and Structures

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show abstract

“…Η επιλογή του ιδιαίτερου αυτού προβλήματος έγινε με γνώμονα την ύπαρξη πειραματικών και υπολογιστικών λύσεων, εφόσον αυτό ανταποκρίνεται στα δοκίμια που χρησιμοποίησαν οι Herrmann και Grebner[16] στα πειράματα τους.Λόγω ύπαρξης δύο διαφορετικών υλικών ταυτόχρονα με μη διεπιφανειακή ρωγμή, η τεχνική των υποχωρίων επιβάλει την χρήση τριών υποχωρίων στο μοντέλο συνοριακών στοιχείων, όπως φαίνεται στο Σχήμα 5 22…”

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Προσομοίωση Θερμικά Ελεγχόμενης Θραύσης Με Υπολογιστικές Μεθόδους

Κατσαρέας¹

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Within the context of the general effort to find a method for the analysis-design of failure resistant structures, the present work utilizes the boundary-only element method for solving problems of thermally driven fracture. This method requires only the discretization of the boundary, eliminating the volume integrals by transforming them to boundary ones. The problems under examination are kinked, curved and interfacial cracks under uniform thermal loading, linear cracks under thermal shock, radial cracks under thermomechanical shock in composites and finally quasistatic crack extension under uniform thermal loading in homogeneous and bi-materials. Crack surface discretization is performed through the subdomain technique, while the singular behavior of displacementtemperature and stress -heat flux fields near the crack tip, is modeled via the quarter-point elements. Generalized expressions of the well-known displacement and traction-based stress intensity factor computation formulas, were constructed.The computed stress intensity factors, as well as the crack extension paths, obtained using four different crack extension criteria, are compared with experimental, analytical and computational results found in the literature. The method shows excellent and stable performance in respect of accuracy and convergence in the whole range of crack shapes and sizes that have been encountered, using relatively coarse meshes. This fact alone makes the current method more efficient, in terms of computer speed and memory, than other traditional or not methods that are in use today and therefore much more attractive as an analysis -design tool of failure resistant thermally loaded structures.

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Reconstruction of the heat flux input of coated gun barrel with the interfacial thermal resistance

Chen

et al. 2023

Case Studies in Thermal Engineering

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A more realistic thermal shock analysis of a radially multicracked thick-walled cylinder

Cited by 11 publications

References 12 publications

Multiple axial cracks in a coated hollow cylinder due to thermal shock

Multiple axial cracks in a coated hollow cylinder due to thermal shock

Προσομοίωση Θερμικά Ελεγχόμενης Θραύσης Με Υπολογιστικές Μεθόδους

Reconstruction of the heat flux input of coated gun barrel with the interfacial thermal resistance

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