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Stress drop and slip vector on a dislocation in an elastic space due to localized force distributions

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Il Nuovo Cimento C

Summary

Some earthquake models based on the elastic theory of dislocations are presented. Earthquake occurrence is modelled as the opening of a crack in an infinite elastic medium triggered by the action of localized stress distributions. The fracture is modelled as a continuum of infinitesimal dislocations. This approach allows us to have complete information about the stress field and the displacement field and to make a first step towards understanding the relation between source mechanism and stress distributions.

Riassunto

Si presentano alcuni modelli di meccanismi sismici basati sulla teoria elastica delle dislocazioni. Un terremoto è modellato dall'apertura di una frattura in un mezzo elastico infinito causata dall'azione di distribuzioni localizzate di sforzi. La frattura è rappresentat tramite un continuo di distribuzioni infinitesime. In questo modo si possono ricavare i campi di spostamento e di sforzo causati dalla frattura. I risultati ottenuti sono intesi come un primo approccio alla comprensione dei legami fra meccanismo sismico e distribuzione dello sforzo tettonico.

Резюме

Предлагаются некоторые модели землетрясений, основанные на упругой теории дислокаций. Моделируется возникновение землетрясений, как открытие трещины в бесконечной упругой среде, инициированное действием локаликонечно малых дислокаций. Этот подход позволяет получить полную информацию о поле напряжений и поле смещений и сделать первый шаг в понимании связи мещду механизмом осточник⦎ и распределениями напрящений.

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Also at Dipartimento di Scienze della Terra dell'Università, Via della Montagnola 30, 60100 Ancona, Italia.

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Bonafede, M., Dragoni, M. Stress drop and slip vector on a dislocation in an elastic space due to localized force distributions. Il Nuovo Cimento C 3, 461–480 (1980). https://doi.org/10.1007/BF02507349

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  • DOI: https://doi.org/10.1007/BF02507349

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