Thermal Residual Stresses in Simply Supported Thermoplastic Laminated Plates under a Parabolic Temperature Distribution

Abstract

In the present study, a thermal elastic-plastic stress analysis is carried out on simply supported symmetric cross-ply [0/90]2 and angle-ply [30/30]2, [45/45]2, and [60/60]2 thermoplastic laminated plates. The temperature changes parabolically along the thickness of the plates. It is T0 and T0 at the upper and lower surfaces, respectively. The composite material is assumed to be linear strain hardening. An analytical solution is performed for satisfying the thermal elastic-plastic stress-strain relationship and boundary conditions for small plastic deformations. The Tsai-Hill theory is used as a yield criterion. The elastic-plastic solution is carried out for small plastic deformations. The residual stress distributions along the thickness of the plates are obtained.

The Evaluation of Thermal Stresses in Thermoplastic Laminated Composites with Different Square Holes

“…In the form of equations (9) and (10), the thermal portion of thermal and mechanical stress problems can be treated as equivalent mechanical loads defined by T N and T M in equations (6) and (8), respectively in addition to the mechanical loads, N and M [11].…”

“…The distribution of residual stress and deformations in the beam were obtained for the case that the temperature distribution varies linearly between the upper and lower surfaces. Öndürücü and Topcu [8] studied an elastic-plastic stress analysis on simply supported thermoplastic composite laminated plates. The temperature was selected parabolically from -T 0 to T 0 through the thickness of the plates.…”

Numerical evaluation of thermal stresses generated in laminated composite structure exposed to low temperatures

“…The first group of authors investigated thermally induced stresses at micro-level, where they are generated locally in vicinity of fiber and matrix contact surface due to a difference in thermal expansion coefficients between matrix and fiber [1,2]. The other group focused their work on macro-level, where mismatch of thermal expansion coefficients in different directions generates so-called thermal stresses within a composite [3][4][5][6].…”

Disorientation angle influence on the thermal residual stresses in carbon multilayered composite plates of different thicknesses

“…Previous researches [1][2][3][4][5][6] have explained the influence of different conditions on the stress-strain state of composite structures. Wong [1] studied the thermal stresses in the discrete joints of sandwiched structures by employing a two-step solution for modeling the stresses in the discrete joints of a sandwiched structure resulting from mismatched thermal expansion.…”

“…Węglewski et al [3] presented the results of experimental measurements and numerical modeling of the effect of particle size on the residual thermal stresses arising in sintered metal-matrix composites after cooling down from the fabrication temperature. Additionally, Ondurucu and Topcu [4] carried out a thermal elastic-plastic stress analysis for thermoplastic laminated plates. The elastic-plastic solution for small plastic deformations, and the residual stress distributions along the thickness of the plates were obtained.…”