Study of the Mechanical Behavior of Low-Velocity Impact Loading in the Presence of Stress Concentrators

被引：2

作者：

Braga Neto, Jose Lira ^{[1
]}

da Cunha, Ricardo Alex Dantas ^{[1
,2
]}

Targino, Talita Galvao ^{[1
]}

da Cunha, Rayane Dantas ^{[1
]}

de Amorim Jr, Wanderley Ferreira ^{[3
]}

Freire Jr, Raimundo Carlos Silverio ^{[1
]}

机构：

[1] Univ Fed Rio Grande Do Norte, Dept Engn Mecan, Programa Posgrad Engn Mecan, Campus Univ, BR-59072970 Natal, RN, Brazil

[2] Inst Fed Educ, Ciencia & Tecnol Para, Campus Parauapebas,Rodovia PA160,Km 68,5 S-N, BR-68515000 Parauapebas, PA, Brazil

[3] Univ Fed Campinha Grande, Dept Engn Mecan, Campus Univ,Rua Aprigio Veloso 882, BR-58429900 Campina Grande, PB, Brazil

来源：

JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2023年 / 32卷 / 23期

关键词：

damage propagation; drop test; flexural after impact; stress concentration factor; void content; FIBER COMPOSITES; HOLE; STRENGTH; PLATE;

D O I：

10.1007/s11665-023-07881-x

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The aim of this article was to assess the behavior of polymer composites under low-velocity impact considering stress concentrators (two side holes at the point of impact) and determine the residual mechanical properties of these materials using FAI (Flexural After Impact). Analysis of residual properties ascertained the effects of damage and stress concentrators, assessing their individual influence in increasing the stress concentration factor (K). This analysis was conducted via tests that consider the separate effects of each case and a formulation that relates them. In addition, this paper also assessed the influence of void percentage on the impact and residual strength, developing two E-glass fiber fabric-based composites with different void percentage. The tests performed showed that impact damage increased the concentration factor of the material by 18%, but in samples tested with side holes, damage decreased residual strength by only 5%.

引用

页码：10783 / 10792

页数：10

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