Abstract: An artefact is provided for use in cases where two bodies are to be connected together by load limiting means.The artefact comprises one portion adapted to be connected rigidly with one of the bodies and a second portion to be associated with the other body and connected in pressure-sensitive or tension-sensitive relationship with the first portion by a connection which incorporates at least one load limiting means which consists of at least two members, one of which is adapted to deform when the load between the two portions exceeds a predetermined value so as to permit of relative movement between the two members.Such artefact is useful in connection with the protection of pressure vessels from excessive build-up of internal pressure since the artefact may be used in securing a blow-off panel to the vessel.

Abstract: Energy-absorption for a composite article is achieved by incorporation in the article of a load-bearing tubular element of ductile material which is bonded to another component of the article, the ductility of the element being such that the element deforms plastically at a part intermediate its ends when subjected to axial tensile stress less than the ultimate tensile strength of the element, the ductile material having deformation characteristics which cause the wall of the said part of the element to contract towards its longitudinal axis, thereby absorbing energy. An inner member may be provided to resist inwards continuation of the tubular element and the tubular element may be situated inside an outer sheath member. The said inner member and/or outer sheath member may be formed to elongate or break before the tubular element in response to the axial tensile stress.