Numerical Design of a Thread-Optimized Gripping System for Lap Joint Testing in a Split Hopkinson Apparatus

• Type: Article in International Scientific Journal
• Date: 2023

Authors

Moreira, BS (Author) Other; Nunes, PDP (Author) Other; da Silva, CM (Author) Other; Tenreiro, AFG (Author) Other; António Mendes Lopes (Author) FEUP; Ricardo Carbas (Author) FEUP; Marques, EAS (Author) FEUP; Parente, MPL (Author) FEUP; da Silva, LFM (Author) FEUP

Journal

Title: Sensors

Vol. 23

Final page: 2273

ISSN: 1424-3210

Publisher: MDPI

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 0 Citations

Other information

Authenticus ID: P-00X-XSW

DOI: 10.3390/s23042273

Abstract (EN): Currently, few experimental methods exist that enable the mechanical characterization of adhesives under high strain rates. One such method is the Split Hopkinson Bar (SHB) test. The mechanical characterization of adhesives is performed using different specimen configurations, such as Single Lap Joint (SLJ) specimens. A gripping system, attached to the bars through threading, was conceived to enable the testing of SLJs. An optimization study for selecting the best thread was performed, analyzing the thread type, the nominal diameter, and the thread pitch. Afterwards, the gripping system geometry was numerically evaluated. The optimal threaded connection for the specimen consists of a trapezoidal thread with a 14 mm diameter and a 2 mm thread pitch. To validate the gripping system, the load-displacement (P-delta) curve of an SLJ, which was simulated as if it were tested on the SHB apparatus, was compared with an analogous curve from a validated drop-weight test numerical model.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 20