Strength of Composite Laminate with Reinforced Hole

Lee, J.H.; Mall, S.

doi:10.1177/002199838902300403

Cited by 9 publications

(6 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, as the hole size increases, the flexural strength decreases. The drop in properties with hole size is generally similar in trend to the previous studies [7,9].…”

Section: Satin Weavesupporting

confidence: 88%

See 1 more Smart Citation

The Flexural Behavior of Woven Prepreg Thermoplastic Composites

Mariatti

Nasir

Ismail

2001

Journal of Thermoplastic Composite Materials

View full text Add to dashboard Cite

Studies on the flexural damage behaviors of satin and plain continuous-fiber-impregnated thermoplastic (COFIT) prepreg woven composites were carried out. Their weaving characteristics such as float length, interlace region, etc., which are believed to affect composite properties, were determined. It was found that the satin weave exhibits better flexural properties such as flexural strength and modulus than the plain weave system, with a more obvious trend in the 3-ply laminate system. The presence of hole damage significantly influences the damage resistance of the woven system. Both woven systems show a reduction in flexural properties with increasing hole size. In the 3-ply system, due to the greater thickness of the laminate, it was found that the weaving characteristics influence the resin flow and subsequently influence the wetting between the laminates and also affect the composite properties. From the SEM photographs, it was found that the satin weave exhibits better wetting at the interply region, resulting in better flexural properties than the plain weave. In contrast, the plain weave exhibits debonding failure at the interply region, which is obviously observed at the interlace area. This situation might be due to insufficient molding conditions such as molding temperature, time, or pressure. It is obvious therefore that different woven patterns require different molding conditions to obtain optimum properties.KEY WORDS: woven composite, COFIT prepreg, satin weave, plain weave, flexure.

show abstract

“…For example, as the hole size increases, the flexural strength decreases. The drop in properties with hole size is generally similar in trend to the previous studies [7,9].…”

Section: Satin Weavesupporting

confidence: 88%

“…This is explained by the large drop in flexural properties. A previous study [9] on the tensile behavior of woven prepreg systems also showed a similar trend in which tensile properties decrease with hole size. In other words, larger holes clearly weaken the damage resistance of the system.…”

Section: Resultssupporting

confidence: 65%

The Flexural Behavior of Woven Prepreg Thermoplastic Composites

Mariatti

Nasir

Ismail

2001

Journal of Thermoplastic Composite Materials

View full text Add to dashboard Cite

show abstract

“…For brevity, surface failure strains are only quoted as averaged “typical” values for each test set. Individual strains can be obtained from [6].…”

Section: Methodsmentioning

confidence: 99%

“…The objectives of this research are to measure the effect of a wide range of different drilling parameters on composite laminate static notched strength using a suitable simple static open-hole test method. To achieve these objectives test specimens have been drilled with different drilling parameters and tested under tensile, compressive and flexural loads [6].…”

Section: Introductionmentioning

confidence: 99%

Flexural Testing of Composite Laminates for Drilling Trial Assessment

Farrow

Lee

Kong³

2000

Advanced Composites Letters

View full text Add to dashboard Cite

This work presents a study of flexural testing as a convenient method for ranking drilling trials of composite materials. The work includes an experimental study of drilling parameter effects on composite laminate hole quality as measured by static tension, compression and flexural open hole tests. Flexural testing and results processed in terms of the outermost 0° layer provides a consistent ranking of holes drilled with different process parameters despite only subtle changes in static notched strength for the thick composite samples tested. Specific observations from flexural tests are consistent with current drilling practices in terms of best process parameter settings and the method shows sufficient sensitivity to distinguish between the effects of drill-entry and drill-exit damage and subtle changes in lay-up.

show abstract

“…The tensile performance of HMF330/34 false(0/+45/90false)S laminate with symmetric reinforcement has been observed to increase the strength 29–40% in comparison to an unreinforced panel [10]. Tension and compression experiments using quasi-laminates with circular holes have been widely conducted [5,11,12]. The geometry of the holes is small relative to the overall size.…”

Section: Introductionmentioning

confidence: 99%

Experimental and FEM Studies on Secondary Co-Curing Reinforcement of Laminates

2018

View full text Add to dashboard Cite

In this study, a static tensile test of secondary co-cure reinforcement (SCR) of laminates revealed the damage and fracture locations in the respective structure. Test results indicated that adhesive debonding was the primary cause of structural failure. Finite element modeling (FEM) performed on the large opening laminate and strengthening structure consisted of simulations of the axial tension experiment, damage assessment, and the final load estimate. It was observed that the tensile strength of SCR was increased by 10.81% in comparison with the unrepaired structure. The results of FEM indicated that the initiation and propagation of damage, and final failure, were located in the layer of reinforcing section which was bonded to the adhesive layer, proving that the performance of the adhesive layer was the dominating factor with regard to the reinforced structure and that the thickness of the reinforcing section could be reduced to lessen the weight.

show abstract

Strength of Composite Laminate with Reinforced Hole

Cited by 9 publications

References 3 publications

The Flexural Behavior of Woven Prepreg Thermoplastic Composites

The Flexural Behavior of Woven Prepreg Thermoplastic Composites

Flexural Testing of Composite Laminates for Drilling Trial Assessment

Experimental and FEM Studies on Secondary Co-Curing Reinforcement of Laminates

Contact Info

Product

Resources

About