Thermomechanical behavior of three dimensionally printed fabric structures

Abstract

Additive manufacturing of fabrics is an emerging research topic with potential applications in several industries including high performance wearable products and high‐temperature textiles. Therefore, thermal, mechanical, and viscoelastic properties of such fabrics need to be determined. In this research, the thermomechanical behavior of additively manufactured plain weave fabrics at and above glass transition temperature (Tgtrue) is studied. The time‐dependent mechanical response using a viscoelastic material model is represented by a Prony series as a function of frequency (f). Unit cells of plain weave fabrics are additively manufactured using poly(lactic) acid (PLA). Tensile and compression tests were performed on unit cells in a thermal environment using dynamic mechanical analysis (DMA). A multiphysics finite element model is implemented to duplicate the experimental setup. The experimental results are compared with that of computational results. The relative error percentages in the peak forces at each temperature are 23.60% at 60°C, −8.85% at 65°C, and −6.25% at 70°C. A better agreement in peak forces is seen for unit cells above Tg. The computational model developed for unit cells is used to predict the thermomechanical‐viscoelastic response of large additively manufactured fabric structures which is difficult to evaluate experimentally.

Prediction and adjustment of elastic properties in three‐dimensional orthogonal woven composites through dual‐scale modeling

“…The results showed that a well-designed gradient distribution improves the material's in-plane performance. Additionally, multi-scale methods have found positive applications in aspects such as the thermal performance, 26,27 curing process, 28 and performance degradation 29,30 of composite materials. Multiscale analysis provides a foundational framework for further research into 3D woven composites, such as constitutive model parameters for homogenized models under external impact [31][32][33] and training datasets for machine learning from extensive simulation data.…”

Research on the influencing factors of hysteresis heat of rubber roller in battery pole piece calendering

“…16 The increase in steady-state temperature is regarded as a precursor of fatigue failure of rubber materials, 17 and the higher temperature could make the rubber material age and shorten the fatigue life. 18,19 The hysteresis temperature rise will cause surface fatigue shedding, abrasive wear, plastic deformation, cracks, and even fracture damage in the rubber roller, 20,21 as shown in Figure 1, so that they need to be replaced frequently, thus increasing the production cost. In addition, the loading frequency and cycle in the mechanical loading process, the fillers and additives in the rubber formula, the ambient temperature, and humidity will affect the fatigue life of the rubber material.…”