Free-edge effects of corrugated laminates

Abstract

Due to their high numerical efficiency, homogenization models are often employed in the analysis of corrugated laminates. They are usually derived assuming periodic behavior in the corrugated direction and generalized plane strain in the out-of-plane direction, which corresponds to the assumption of infinite dimensions of the structure. As a consequence, any influences of edge effects are not mapped, although they can have a significant impact on the mechanical behavior of a given structure. The objective of this manuscript is to investigate the influence of boundary conditions - a combination of free-edges and clamping - on the structural stiffness of corrugated laminates. A total of six load cases are investigated which correspond to the line loads considered in the classical theory of laminated plates. The results of this parameter study allow the identification of several critical loading situations, where free edges can significantly alter structural stiffness. The given investigations hence contribute to the investigation of the validity range of homogenization models.

The Dark Side of Work-life Policies: Examining the Impact of Co-worker Childcare Policy Usage on Work Anxiety

“…Further, recent media articles suggest there is growing tension between parents and non-parents because of these new COVID-related policies. As parents use these policies, non-parents have to pick up the slack for them (i.e., additional work demands), which is causing conflict between these two groups (parents as users, non-parents as non-users) (Alaimo, 2020;Filipovic, 2020;Schieman, 2020;Wakabayashi & Frenkel, 2020).…”

“…In this research, we focus on childcare-related WLPs, given that (1) childcare policies are one of the most widely available programs in Western countries and Eastern countries (Choi et al, 2018), and (2) the COVID-related policies that are running into trouble (the tension between users and non-users duo to higher additional work demands transferred to the non-user (Alaimo, 2020;Filipovic, 2020;Schieman, 2020;Wakabayashi & Frenkel, 2020)) are the ones tied to childcare and parenting needs. Therefore, with this study, we hope to understand why using childcare-related policies negatively impact others.…”

“…As a result, CUCP may generate the perception of additional and informal work demands for employees, since they may be implicitly asked to take on more without an attendant increase in compensation (Filipovic, 2020). The additional, informal and unexpected nature of these extra job tasks makes CUCP a demand, as is likely to overwhelm and overload the employees, which can challenge their ability to adequately complete work (Bakker & Demerouti, 2017) resulting in feelings of insufficiency since the criteria for good performance and/or adequate behavior may not be met (Semmer et al, 2019), and feelings of being less competent than they would otherwise may arise (Judge & Bono, 2001).…”

“…While the vast majority of the WLP literature suggests that the added control individuals experience when utilizing WLPs often leads to positive outcomes for the WLP user, such as fewer symptoms of depression (Perry-Jenkins, Smith, Wadsworth & Halpern, 2017) and decreased stress and burnout (Grzywacz, Carlson & Shulkin, 2008), there is growing consideration for how the usage of WLPs may impact other employees (e.g., de Sivatte & Guadamillas, 2013). Numerous reports have emerged over the course of the COVID-19 pandemic that indicate a growing tension between parents utilizing childcare benefits and their non-parent counterparts whom have had to pick up the slack (Alaimo, 2020;Filipovic, 2020;Schieman, 2020;Wakabayashi & Frenkel, 2020). Based on research that describes how co-workers using WLPs can negatively affect others' workloads (e.g., Golden, 2007;Gueutal & Taylor, 1991), we suspect that co-workers using childcare policies (CUCP) over the course of the pandemic positively relates to work anxiety in employees.…”