The social benefit of people＇s common behaviors is high. However, once there is the negligence, the harm to the interests of law will also be great. When more than two people implement the dangerous common behaviors,...The social benefit of people＇s common behaviors is high. However, once there is the negligence, the harm to the interests of law will also be great. When more than two people implement the dangerous common behaviors, each doer has the common duty of care. If they commonly violate the duty of care which leads to the occurrence of the crimes, the unpremeditated joint principal offender establishes. China should take reference from the research experience of other countries in the world, to regulate people＇s common behaviors with the theory of the unpremeditated joint principal offender, to prevent and reduce the accidents from happening.展开更多
The maximum principal stress, von Mises equivalent stress, equivalent creep strain, stress triaxiality in dissimilar metal welded joints between austenitic（HR3C） and martensitic heat-resistant steel（T91） are simul...The maximum principal stress, von Mises equivalent stress, equivalent creep strain, stress triaxiality in dissimilar metal welded joints between austenitic（HR3C） and martensitic heat-resistant steel（T91） are simulated by FEM at 873 K and under inner pressure of 42.26 MPa. The results show that the maximum principal stress and von Mises equivalent stress are quite high in the vicinity of weld/T91 interface, creep cavities are easy to form and expand in the weld/T91 interface. There are two peaks of equivalent creep strains in welded joint, and the maximum equivalent creep strain is in the place 27-32 mm away from the weld/T91 interface, and there exists creep constrain region in the vicinity of weld/T91 interface. The high stress triaxiality peak is located exactly at the weld/T91 interface. Accordingly, the weld/T91 interface is the weakest site of welded joint. Therefore, using stress triaxiality to describe creep cavity nucleation and expansion and crack development is reasonable for the dissimilar metal welded joint between austenitic and martensitic steel.展开更多
文摘The social benefit of people＇s common behaviors is high. However, once there is the negligence, the harm to the interests of law will also be great. When more than two people implement the dangerous common behaviors, each doer has the common duty of care. If they commonly violate the duty of care which leads to the occurrence of the crimes, the unpremeditated joint principal offender establishes. China should take reference from the research experience of other countries in the world, to regulate people＇s common behaviors with the theory of the unpremeditated joint principal offender, to prevent and reduce the accidents from happening.
基金Funded by the National Natural Science Foundation of China(No.51374154)
文摘The maximum principal stress, von Mises equivalent stress, equivalent creep strain, stress triaxiality in dissimilar metal welded joints between austenitic（HR3C） and martensitic heat-resistant steel（T91） are simulated by FEM at 873 K and under inner pressure of 42.26 MPa. The results show that the maximum principal stress and von Mises equivalent stress are quite high in the vicinity of weld/T91 interface, creep cavities are easy to form and expand in the weld/T91 interface. There are two peaks of equivalent creep strains in welded joint, and the maximum equivalent creep strain is in the place 27-32 mm away from the weld/T91 interface, and there exists creep constrain region in the vicinity of weld/T91 interface. The high stress triaxiality peak is located exactly at the weld/T91 interface. Accordingly, the weld/T91 interface is the weakest site of welded joint. Therefore, using stress triaxiality to describe creep cavity nucleation and expansion and crack development is reasonable for the dissimilar metal welded joint between austenitic and martensitic steel.
