Work

A Multi‐View Analysis on the Longitudinal Half Fixed Beam Method for Mode III Delamination of Composite Laminates

Year: 2025

Type: article

Abstract: ABSTRACT The feasibility and applicability of longitudinal half fixed beam (LHFB) test of CFRP unidirectional laminates is investigated from multiple perspectives in this work. A three‐dimensional finite element model is used to simulate the LHFB specimen, employing the Virtual Crack Closure Technique (VCCT) in conjunction with the B ‐ K Criterion. Comparisons between solid‐loading and simplified line‐loading boundary conditions reveal no significant differences in results. The applicability of various data reduction methods is evaluated, demonstrating that the Compliance Calibration Method is effective in determining the mode III strain energy release rate. The distribution uniformity of strain energy release rate along the crack front is analyzed through parameter analysis, including geometric dimensions of the specimen and the initial delamination length. The results indicate that this test method enables an almost uniform distribution of mode III strain energy release rate, but the mode II component at the crack edge remains non‐negligible. However, the proportion of the mode II component can be minimized by optimizing the geometric dimensions of the specimen.

Source: Polymer Composites

DOI: 10.1002/pc.70192

Authors: Wenjuan Lin, Yu Gong, Zhaobin Li, Jianyu Zhang, Libin Zhao, Ning Hu

Institutions: Chongqing University, Hebei University of Technology, State Key Laboratory of Reliability and Intelligence of Electrical Equipment

Language: English

Topic: Mechanical Behavior of Composites

Subfield: Mechanics of Materials

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $4,480

Funders: National Natural Science Foundation of China, Chinese Aeronautical Establishment, Fundamental Research Funds for the Central Universities