The quality and performance of sewn seams

Mukhopadhyay, Arunangshu; Midha, Vinay Kumar

doi:10.1533/9780857093967.1.175

Cited by 20 publications

(31 citation statements)

References 49 publications

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“…Figure 1 shows that in case of block construction, both panels and gores are joined in parallel, but in bias construction, any two panels of same gores are joined in parallel but any two gores are joined oppositely [11,12]. Although the seams are used for making large construction by stitching a number of fabric components, but the primary function of seam is to provide uniform stress transfer from one piece of materials to another and to preserves the overall integrity of the assembly [14]. The basic performance properties of stitches and seams include strength, elasticity, durability and security.…”

Section: Introductionmentioning

confidence: 99%

“…There are much work related to seam tensile characteristics and out of which most of these are based on studies related to the effect of fabric type, sewing threads, gauge length, stitch density, stitching speed, methods of testing (Strip and Grab test), etc on seam strength, seam elongation and seam slippage [14,[15][16][17][18][19], but the work related to impact of seam angle in relation to fabric which is most important in case of parachute is very limited. In the recent past, some researchers work on the measurement of seam strength and elongation at different bias angle using superimposed lock stitch seams [1,20,21].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of bias angle of stitching on tensile characteristics of lapped seam parachute canopy fabric – Part I: Mathematical modelling for determining test specimen size

Singh

Mukhopadhyay

Chatterjee

2016

Journal of Industrial Textiles

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This study embodies evaluation of ideal test specimen dimension for the study of tensile characteristics of lapped seam parachute canopy fabric. Due to anisotropic nature of textile fabrics, the mechanical property of unseamed and seamed fabric changes with the change in specimen test direction. Therefore, measurement of tensile property at different bias angle (an acute angle between warp and specimen length/test direction) becomes more important in parachute canopy where joining of its various parts is not only in principle direction but also at different bias angle. The present paper deals with the influence of bias angle of stitching on breaking strength and elongation of unseamed and lapped seam parachute canopy fabric using test specimen dimension based on previous practice. Present study reveals that there is need of re-specification of specimen dimension for evaluation of tensile properties of parachute fabric. With the changes in angle of bias, width and gauge length of test specimen, the number of different category of warp and weft yarns available between the specimen grip lines changes and can be calculated mathematically. This has important role in affecting the ultimate properties of parachute fabric. Based on the study, an optimized dimension of test specimen has been postulated for evaluation of tensile characteristics of parallel/opposite stitched specimen through which reliable test result can be obtained. The proposed dimension can be used for comparative analysis of breaking strength and elongation of unseamed and seamed fabric at different bias angle.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of bias angle of stitching on tensile characteristics of lapped seam parachute canopy fabric – Part I: Mathematical modelling for determining test specimen size

Singh

Mukhopadhyay

Chatterjee

2016

Journal of Industrial Textiles

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“…Based on the result, the best possible sewing needle will be selected in the production process to achieve minimum damage to sewing needle and fabric [16][17][18][19].…”

Section: Textiles For Advanced Applications 204mentioning

confidence: 99%

Textile Composites for Seat Upholstery

Kovačević¹,

Domjanić²,

Brnada³

et al. 2017

Textiles for Advanced Applications

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Textile for seat upholstery is a part of wide field of Mobiltech. It is very important segment of the visual identity of a vehicle, so its design, along with other high set requirements, is of the utmost importance. Textiles for seat upholstery are subject to many challenges; therefore, some of the required properties are resistance to stress, abrasion, UV radiation, external temperature and humidity, static electricity and peeling, as well as offering safety and comfort. For cladding car seat construction with textile, individual cutting parts of the fabric are joined by seam, and this part usually has the lowest mechanical properties. Therefore, in designing seat upholstery, the focus needs to be on these material segments. The function of the seam is to provide uniform transmission of loads between two joined materials and keep their integrity, which is not completely possible with stitched seam. Therefore, the material behaviour in places of sewn seam, the impact of the needlepoint and needle type on the strength, the appearance and seam quality will be discussed. Since the textile composites for seat upholstery are exposed to the multi-cyclical stress on certain areas, a part of this chapter will be focused precisely on that field.

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“…In case of parachute, during opening it experiences high shock force and this shock force is shared through canopy fabric, stitches and seams, webbing and suspension line of parachute system. Out of many parameters, quality of seams and stitches are very important for effective performance of parachute [11][12][13][14]. As discussed in Part I of this paper that the seam angle directly related with fabric bias angle (an acute angle made between the direction of specimen length and its warp).…”

Section: Introductionmentioning

confidence: 99%

Influence of bias angle of stitching on tensile characteristics of lapped seam parachute canopy fabric – Part II: Study on optimized test specimen dimension

Mukhopadhyay

Chatterjee

Singh

2016

Journal of Industrial Textiles

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The influence of bias angle of stitching on tensile characteristics of lapped seam parachute canopy fabric has been studied based on proposed test specimen dimension as reported in Part I of this paper. Test results obtained using the postulated test specimen dimension exhibit reliable tensile properties of canopy fabrics. It is also therefore possible for comparative analysis of tensile strength and elongation of unseamed and seamed fabric at different bias angle. During comparative analysis, the data obtained from the previous test dimension (as mentioned in Part I of this paper) and new test dimension show that there is significantly large difference in absolute values of tensile data obtained by these two methods. The trend of breaking elongation is same in both the cases, but the trend of tensile strength is somewhat different with these two dimensions. Besides these, the absolute values of tensile data obtained through proposed specimen dimension are found to be realistic as compared to the results based on previous test dimension.

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The quality and performance of sewn seams

Cited by 20 publications

References 49 publications

Influence of bias angle of stitching on tensile characteristics of lapped seam parachute canopy fabric – Part I: Mathematical modelling for determining test specimen size

Influence of bias angle of stitching on tensile characteristics of lapped seam parachute canopy fabric – Part I: Mathematical modelling for determining test specimen size

Textile Composites for Seat Upholstery

Influence of bias angle of stitching on tensile characteristics of lapped seam parachute canopy fabric – Part II: Study on optimized test specimen dimension

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