高精度な損傷蓄積則構築のためのメゾ空間スケールモデル構築
概要
In many cases, the function loss by fatigue and fracture is considered as the ultimate condition of the artificial structure. While various CAE technologies have been developed, a high-precision calculation algorithm has been developed for material damage during repeated loading, which is assumed to be difficult to describe in a digital twin in a computer virtual space. To make high precision evaluation, material damage from cyclic pre-strain is investigated. Then, material damage depends on not only equivalent plastic strain but the order of pre-strain loaded. Also, material damage can be expressed by effective damage strain from back stress uploading and total dislocation density calculated from conventional mechanism based on strain gradient plasticity (CMSGP). These results and the development of various monitoring technologies under parallel development are expected to significantly improve the accuracy of artificial structure management.
