Study on new creep equation using discrete cosine transform for high temperature materials.

摘要: Abstract For an equation representing creep strain-time relationship curves of high temperature materials, the equations which represent from primary region to tertiary using exponential functions such as modified θ projection [3] have already been proposed. However, estimated values by don't necessarily coincide with measured values, and deviations occur between [8]. Then in this paper, we propose a new Discrete Cosine Transform (DCT). According equation, all each interpolated value points gives reasonable value. Therefore it is possible express curve quite well DCT.