# Breakable bonds

 Breakable bonds, such as spot welds, between surfaces: can be defined only at the nodes of the slave surface of a pure master-slave contact pair; can be defined only in the first step of a simulation; constrain the slave node to the master surface until the failure criterion of the bond is met; are designed to provide a simple simulation of spot weld failure under relatively monotonic straining, such as occurs during an impact of a vehicle structure; do not constrain the rotational degrees of freedom at the node; use either a time to failure or a damaged failure model to simulate the postfailure response of the bonds; use the default contact property model (About mechanical contact properties) once the bonds have been broken; and can be used only between two deformable surfaces with the kinematic contact pair algorithm. The following topics are discussed:
 Related Topics Contact formulations for contact pairs in Abaqus/Explicit In Other Guides *BOND *SURFACE INTERACTION *CONTACT PAIR

ProductsAbaqus/Explicit