Replication Data for: Self-Strengthening Tape Junctions Inspired by Recluse Spider Webs

The raw data for the associated manuscript is organized here into three categories: 1) relating to the measurement and analysis of the native recluse spiders loop junctions, 2) raw images found in the figures throughout the manuscript, and 3) relating to the experiments testing the effect that junction angle has on the strength of two intersecting tapes. It is recommended to browse the data files in Tree mode, which will make the files appear in folders reflecting this organization. 1) Loxosceles Loop Junction Images and Analysis The folder titled, SEM Raw Images, has all of the scanning electron microscopy (SEM) images taken of the native recluse loop junctions. Some images are close-ups of individual junctions and others take a broader perspective (macro) of many loop junctions in series. Where possible several close-up images of the individual junctions are accompanied with a macro image. These images were imported into ImageJ where the junction angle was measured. The measurements for all 41 loop junctions observed are in the folder titled, Raw Data Files in the file titled, Loxosceles Loop Junction Angle Measurements.txt. The folder titled, Raw Data Files contains, in addition to the angle measurements, the raw data for analyzing the strength of individual loop junctions. The data is in native MATLAB data format. These datasets include the complete tensile data and the cross-sectional area data for each spiders silk. The MATLAB code titled, Figure_2A_2B_code, processes the raw tensile data from the natural recluse spiders loop junctions. This data is plotted as two representative curves in Figure 2A and as a complete set as a histogram in Figure 2B. The MATLAB code titled, Figure_7_code, processes and plots the loop junction data found in, Loxosceles Loop Junction Angle Measurements.txt and executed the model of a random set of recluse loops. This code can be executed to generate Figure 7. The folder titled, Raw Data Files, must be open in MATLAB to run this code! This code uses the MATLAB function, areacalculation, to calculate the junction area for a given junction angle. 2) Raw Images This folder is organized by the respective figure in the manuscript where each image can be found. Additional metadata for each image can be found accompanying each image. 3) Tensile Data and Analysis This folder contains all of the raw tensile data for all tape-tape junction experiments conducted. All of the tensile data is in the folder titled, Raw Data Test Files. Within this folder is a .txt file for each sample tested. The file names are critical to the figure codes working properly because they contain the information for the junction angle and iterations. The file names are in the format year-month-day_trialnumber_junctionangle.txt. Also in the Raw Data Test Files folder are two functions used within some of the figure codes: fbfill and areacalculation. These functions will be used in the figure codes to properly analyze the data. To generate any figure using the MATLAB code in this folder, first open the code in MATLAB. Then within MATLAB, open the folder Raw Data Test Files. Only with this folder open in MATLAB will the code be able to find the correct raw data .txt files. The rest of the contents of this folder are MATLAB codes for specific figures in the manuscript. The only exception to this is the code titled, surfaceenergy_code, which is executed to calculate the phenomenological surface energy for the tapes used in these experiments.本关联研究论文的原始数据按以下三类整理于此：1）与本土隐士蜘蛛环结的测量与分析相关的数据；2）论文各配图中的原始图像；3）与测试结角对两条相交胶带粘结强度影响的实验相关的数据。建议以树形目录模式浏览数据文件，此时文件将按上述分类结构存储在对应文件夹中，便于快速查阅。 1) 隐士蜘蛛环结图像与分析（Loxosceles Loop Junction Images and Analysis） 名为"SEM Raw Images"的文件夹中存放了所有针对本土隐士蜘蛛环结拍摄的扫描电子显微镜（scanning electron microscopy，SEM）图像。部分图像为单个环结的特写视图，其余则为多个串联环结的宏观全景视图。若条件允许，每个单个环结的多张特写图像均会搭配一张全景宏观视图。 上述图像均被导入ImageJ软件中，用于测量环结角度。本次观测到的全部41个环结的角度测量数据，存储于名为"Raw Data Files"的文件夹内的"Loxosceles Loop Junction Angle Measurements.txt"文件中。 除角度测量数据外，"Raw Data Files"文件夹还包含用于分析单个环结粘结强度的原始数据，该数据采用原生MATLAB格式存储。这些数据集涵盖了每一种蜘蛛丝的完整拉伸数据与横截面积数据。 名为"Figure_2A_2B_code"的MATLAB代码可处理源自本土隐士蜘蛛环结的原始拉伸数据，并将处理后的数据绘制成两幅代表性曲线（对应图2A）以及完整的直方图（对应图2B）。 名为"Figure_7_code"的MATLAB代码可处理并绘制来自"Loxosceles Loop Junction Angle Measurements.txt"的环结数据，同时运行针对随机选取的隐士蜘蛛环结集的模型，运行该代码即可生成图7。运行此代码前，必须在MATLAB中打开"Raw Data Files"文件夹！该代码会调用MATLAB内置函数`areacalculation`，以计算给定结角对应的环结面积。 2) 原始图像（Raw Images） 该文件夹按论文中的对应图号进行组织，每张图像均可在对应图号的子文件夹中找到。每张图像均附带其元数据文件。 3) 拉伸数据与分析 该文件夹包含本次实验中所有胶带-胶带环结实验的原始拉伸数据。所有拉伸数据均存储于名为"Raw Data Test Files"的文件夹中。该文件夹内包含每个被测样本对应的`.txt`数据文件，文件名对确保配图代码正常运行至关重要，因为文件名中包含了结角与迭代次数的相关信息。文件名格式为：`year-month-day_trialnumber_junctionangle.txt`。 "Raw Data Test Files"文件夹中还包含部分配图代码中用到的两个函数：`fbfill`与`areacalculation`，这些函数将在配图代码中用于正确分析实验数据。 若要运行本文件夹中的MATLAB代码以生成任意配图，需先在MATLAB中打开对应代码，随后在MATLAB中打开"Raw Data Test Files"文件夹。只有在此文件夹处于打开状态时，代码才能正确定位所需的原始`.txt`数据文件。 该文件夹内其余内容均为针对论文中特定配图的MATLAB代码，唯一例外是名为"surfaceenergy_code"的代码，该代码用于计算本次实验中使用的胶带的表观表面能。