Improved thermal stress analysis for castings

Kang, Jinwu; Zhang, J.; Liu, B.; Huang, Tianyou

doi:10.1179/136404608x362188

Cited by 3 publications

(2 citation statements)

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“…Kang et al [22] stated that the casting/sand mold interface underwent very complicated deformation during the casting process. There will be slip, pressurized contact and air gap because of the expansion and contraction of the casting and sand mold as they cool down or are heated up.…”

Section: Mechanical Boundary Conditionmentioning

confidence: 99%

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Modeling and Simulation of the Casting Process with Skeletal Sand Mold

et al. 2020

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The author-proposed skeletal sand mold, which mainly includes a shell, air cavities and a truss support structure, has been experimentally proven to be very useful in controlling the cooling of casting at local areas and at different periods of the casting process. The modeling and simulation of the casting process using a skeletal sand mold were systemically analyzed. Complicated casting/mold and mold/air boundaries, and the thermal and mechanical behavior of the skeletal sand mold during the casting process were highlighted. A numerical simulation of the casting process of a stress frame specimen using a skeletal sand mold was performed. The temperature, stress and displacement fields of the casting and skeletal sand mold were obtained and compared with those using a traditional sand mold. The simulated results were validated with experiments. Using the skeletal sand mold, the cooling rate of the casting can be greatly improved due to the significant heat release from mold surface to environment. The residual stress and deformation of the casting can be reduced because of the decreased stiffness of this kind of mold. Although the skeletal sand mold is susceptible to cracking, it can be avoided by filleting in the conjunctions and increasing the shell thickness.

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Section: Mechanical Boundary Conditionmentioning

confidence: 99%

“…Liu et al [23] integrated the thermal analysis by the finite difference method and stress analysis by the finite element method for the simulation of heavy steel castings. Kang et al [22] converted the finite difference meshes into finite elements so as to realize the thermal and stress analyses of the castings by the same meshes.…”

Section: Numerical Simulationmentioning

confidence: 99%