拡張個別要素法による熱強化ガラスの衝撃破壊解析

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  • Impact Fracture Analysis of Thermally Tempered Glass by the Extended Distinct Element Method
  • カクチョウ コベツ ヨウソホウ ニ ヨル ネツ キョウカ ガラス ノ ショウゲキ ハカイ カイセキ

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抄録

The thermally tempered glass has strong resistance for the surface crack, because the residual compressive stress exists near the surface of the glass. On the other hand, it also has the residual tensile stress in the center of the glass. Fracture behavior of the thermally tempered glass depends on the distribution of the residual stress. However, it is very difficult to clarify those relationships by an experiment. In this paper, a thermally tempered glass model using the Extended Distinct Element Method (EDEM) is proposed. Using our proposed model, the impact fracture behavior and the crack velocity are evaluated. As results for the normal glass and tempered glass, it is confirmed that the distribution of residual stresses can be evaluated by the thermally tempered glass model and the thermally tempered glass model is broken to many pieces by the residual tensile stress as well as experimental results. Furthermore, it is found that residual stresses of tempered glass greatly influence the crack velocity.

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