The basic equations of the Reissner and Mindlin plate theories are derived in an elementary way from the underlying assumptions of the theories about the distribution of in-plane stresses in the Reissner case and the distribution of displacement components in the Mindlin case. The derived equations include a parameter which allows the interpretation of the theories as an approximation of isotropic plates or transversally inextensible plates. Qualitative comportment between the theories is also given.
F.06 Development of a new product
COBISS.SI-ID: 2028387The paper introduces a new approach to establishing thermal fatigue cracks in die casting moulds by measuring the resulting defect-fins on aluminium alloy castings in the actual die casting process. The investigation showed that cracks occurred sooner and were bigger if the mould material had a lower hardness. The maximum depth of the defect-fin observed on the casting due to thermal fatigue crack on the mould with the lowest hardness (42 HRc) at 10000 cycles was 0.37 mm, the maximum width of the defect-fin was 0.76 mm and maximum length was 9.6 mm.
F.06 Development of a new product
COBISS.SI-ID: 11778843In this contribution, we discuss stress, deformation and stability conditions for thin double curved shallow bimetallic translation shells. According to the theory of the third order by the Czech researcher E. Chawalla, which takes into account the equilibrium of forces and moments acting on a deformed body and the supposition of large displacements, we present a system of three differential equations with boundary conditions for the description of displacements on the shell due to the temperature loading of the shell.
F.06 Development of a new product
COBISS.SI-ID: 2037347Prof. Miha Boltežar is a member od the Editorial board of MSSP - Mechanical Systems and Signal rocessing, IF in 2009 is 2.075 which means the 6th place of 105 journals in the category Mechanical Engineering.
C.04 Editorial board of an international magazine
COBISS.SI-ID: 169243The metal sheet fine blanking process of a circular hole is simulated. After the apparent crack is developed through the metal sheet, the sheet domain is divided into two domains with possible friction contact evolution between the separated domains. Taking contact evolution between the separated domains into account results in a better determination of the final fine blanked surface. Time evolution of the computed punch force proves good agreement with the experimental one.
F.09 Development of a new technological process or technology
COBISS.SI-ID: 11286299