Stress distribution study on multi-holes configurations in woven fabric kenaf composite plates

Supar, Khairi; Ahmad, Hishamuddin

doi:10.1088/1757-899x/271/1/012005

Cited by 7 publications

(6 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These elastic properties regarded as "smeared-out" properties as given in Table 2. The description on fabrication process and mechanical testing were given in previous work [8]. The material properties used in constitutive model (i.e., unnotched strength, σo and fracture energy, Gc) were determined from independently laboratory testing [9].…”

Section: Finite Element Modelling Xfem Modelling Approachmentioning

confidence: 99%

Multi-holes configurations of woven fabric kenaf composite plates: experimental works and 2-D modelling

Supar¹,

Ahmad²

2018

J. MECH. ENG. SCI.

View full text Add to dashboard Cite

A study on structures response in multi-holes plates is important to understand the effect of neighbouring hole on stress concentration as subjected to tensile loading prior to bearing failure in multi-bolted joints. Current work implemented experimental framework on staggered and non-staggered multi-holes configurations to include various lay-up types, plate thickness and hole configurations as specified in the testing series. Experimental observations found that all configurations failed in net-section path suggesting that fracture initiates and propagates from the notch tip perpendicular to loading direction in self-similar fashion through the plate thickness. Non-staggered hole configurations demonstrated peak load compared to staggered counterparts due to more congested holes in staggered configurations. Two-dimensional Extended Finite Element Method (XFEM) modelling framework was carried out in all configurations investigated by sufficient meshing refinements, damage stabilization value and boundary conditions. XFEM was extended from classical finite element expression which has enriched function to enable the crack be tracked visually. A physically-based constitutive model from traction-separation relationship was applied and independently measured material properties and in-plane elastic properties were implemented in current work. Strength prediction results showed that good agreement was found in all testing series and showed discrepancies of less than 15%, the best prediction in combination of PX4 lay-ups and staggered multi-holes configurations series.

show abstract

Section: Finite Element Modelling Xfem Modelling Approachmentioning

confidence: 99%

Multi-holes configurations of woven fabric kenaf composite plates: experimental works and 2-D modelling

Supar¹,

Ahmad²

2018

J. MECH. ENG. SCI.

View full text Add to dashboard Cite

show abstract

“…Based on a detailed literature review [ [1] , [2] , [3] , [4] , [5] , [6] , [7] , [8] , [9] , [10] , [11] ], four input parameters were selected as independent variables to study the effect of open holes on the tensile properties of the SS400 steel specimen, comprising hole diameter, location, number, and shape (designated as parameters A, B, C, and D, respectively). The hole locations consisted of (1) centric and (2) eccentric locations, where the latter location represents various practical conditions, especially with structures containing holes that may be positioned off-center relative to the loading direction [ 1 ].…”

Section: Methodsmentioning

confidence: 99%

“…However, in most construction designs, the connection between structural components involves more than a single bolt. This results in a progressively intricate stress field, as bypass stresses can be transferred to neighboring bolts [ 2 , 3 ]. Additionally, the use of multiple staggered holes, often arranged in rivet patterns, reduces the tensile strength of a tension member compared to a single row of holes.…”

Section: Introductionmentioning

confidence: 99%

Analytical optimization of open hole effects on the tensile properties of SS400 sheet specimens using an integrated FFD-CRITIC-DFA method

Saeheaw

2024

Heliyon

View full text Add to dashboard Cite

“…Staggered configurations were designed to gives more effective usable area within neighbouring bolts with showed lengthen net-tension failure associated to "zig-zag" path, readily seen in GFRP joints (Cunningham et al, 2015). However, staggered configurations in WKRP plates does not exhibited "zig-zag" path but showing net-tension failure plane across outer bolt (Supar and Ahmad, 2017b).…”

Section: Comparison With Experimental Datasetsmentioning

confidence: 99%

XFEM Modelling in Multi-bolted Joints Using a Unified Bolt Preload

Supar

Ahmad

2019

Lat. Am. j. solids struct.

View full text Add to dashboard Cite

Multi-bolted joints are adopted and designed to provide efficient load transfer within assembled engineering parts. Bearing failure is favorable during design phase due to more progressive failure mode, however, ability of bypass stress to be transferred to adjacent bolts in multi-bolted joints prone to catastrophic net-tension failure. Former approach known as equivalent spring stiffness (ESS) was proposed but it requires experimental sliding load value. This has led to semi-empirical approach to require experimental setup than incorporating a generic bolt preload value. This paper aims to provide a unified bolt preload (UBP) value to be implemented in each bolt independent upon plate properties and bolts arrangements. Strength prediction were taken place by 3-D Extended Finite Element Method (XFEM) framework of various staggered and non-staggered arrangements to include various lay-ups types and plate thickness. The failure loads predictions in each testing series were investigated and then validated against experimental datasets and also compared with previous technique (ESS approach). Crack patterns and failure modes from this approach were consistent with experimental observations, where net-tension failures were observed within all testing series. Less good prediction compared to from ESS technique, partly due to semi-empirical nature in former approach. Nevertheless, reasonable agreement in UBP technique with experimental datasets were obtained (average discrepancy of approximately 20%).

show abstract

Stress distribution study on multi-holes configurations in woven fabric kenaf composite plates

Cited by 7 publications

References 6 publications

Multi-holes configurations of woven fabric kenaf composite plates: experimental works and 2-D modelling

Multi-holes configurations of woven fabric kenaf composite plates: experimental works and 2-D modelling

Analytical optimization of open hole effects on the tensile properties of SS400 sheet specimens using an integrated FFD-CRITIC-DFA method

XFEM Modelling in Multi-bolted Joints Using a Unified Bolt Preload

Contact Info

Product

Resources

About