Integrity and fracture of plate-like assemblies of topologically interlocked elements

Khor, H.C.; Dyskin, A.V.; Pasternak, E.; Estrin, Y.; Kanel-Belov, A.J.

Авторы: Khor H.C., Dyskin A.V., Pasternak E., Estrin Y., Kanel-Belov A.J.
Сборник: Structural Integrity and Fracture.. SIF 2002. ISBN 9058095134. Structural Integrity and Fracture
Серия: A A Balkema Publishers
Глава в коллективной монографии
Год издания: 2002
Место издания: Swets $&$ Zeitlinger, Lisse
Первая страница: 449
Последняя страница: 456
Аннотация: The paper investigates mechanical behaviour of structures based on the principle of topological interlocking. In these structures the constituent elements are held together by their geometry alone, without any connectors. Only the elements (blocks) at the periphery need to be constrained for the integrity of the whole structure to be ensured. Two types of plate-like structures with interlocking are considered: an assembly of tetrahedra arranged in a special way and a masonry-like assembly of blocks with curved surfaces referred to as osteomorphic blocks. With these shapes, some parts of a block prohibit its displacement in one direction, while the other parts prevent it from moving in the opposite direction. The behaviour of assemblies of interlocked elements under indentation is compared for that of a solid plate of the same thickness and of an assembly of rectangular blocks held together by friction. The topologically interlocking assemblies are found to be very flexible and tolerant to missing blocks. Their structural integrity is due to the specific geometry of the constituents, rather than friction at the interfaces. Structures based on topological interlocking possess high fracture toughness, mainly due to the weakness of the interfaces between the blocks preventing fractures from spreading from one block to another. The loading curves of plates composed from interlocked elements exhibit kinks – small drops and rises in the load. Each of these features is attributed to a temporary loss of inter-block contact due to the action of tensile components of bending stresses in the absence of binding between the blocks. Being an intrinsic property of topological interlocking, these kinks can serve as indicators of non-linear stage of deformation and are precursors of ultimate failure.
Добавил в систему: Белов Алексей Яковлевич

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Integrity and fracture of plate-like assemblies of topologically interlocked elementsстатья

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