Advances in engineering plasticity and its application IX : 14th Asia-Pacific Symposium on Engineering Plasticity and its Applications (14th AEPA 2018) : selected, peer reviewed papers from the 14th Asia-Pacific Symposium on Engineering Plasticity and its Applications (AEPA 2018), December 2-7, 2018, Jeju Island, Korea - Yoon, Jeong Whan; Han, Heung Nam; Kang, Beom Soo; Kim, Young Suk (Key engineering materials, 2019)