Mechanical Strength Evaluation of Elastic Materials by Multiphysical Nondestructive Methods: A Review

Abstract

The main purpose of industrial nondestructive testing (NDT) is to diagnose the stability, reliability and failure probability of materials, components and structures. Industrial component mechanical strength is one of the most important properties NDT is used to characterize. Subtle but perceptible changes in stress-strain behavior can be reliable indicators of defect formation. A detailed review on the state-of-the-art NDT methods using optical-radiation, photoacoustic, and photothermal techniques for mechanical strength evaluation and defect pre-diagnosis is presented in this article. Mechanical strength is analyzed in terms of the deformation/strain field, the stress-strain relation, and the residual stress in an elastic material subjected to tensile or compressive loading, or impact. By introducing typical NDT experiments, the history and features of each methodology are revisited and typical applications are discussed. This review also aims to be used as a reference toward further research and development of NDT technologies characterizing mechanical strength of materials and components.

Identification of Stress States in Compressed Masonry Walls Using a Non-Destructive Technique (NDT)

“…The ultrasonic technique is used for many purposes, but the most common purpose is diagnostic [1][2][3][4]. Ultrasounds are employed by many branches of the industry; they are a crucial tool for electronic engineering, telecommunications or material engineering.…”

Диагностика Остаточных Напряжений В Биметаллических Пластинах Алюминий-Сталь С Использованием Лазерного Ультразвука И Зондирующего Отверстия

“…Исследованию возможности использования лазерных ультразвуковых и фотоакустических (ФА) методов для диагностики внутренних напряжений в современных материалах уделяется все большее внимание [1,2]. Их важными достоинствами являются универсальность, неразрушающий характер и возможность контролировать не только поверхностные характеристики материалов, но и свойства подповерхностных слоев.…”