For our thesis, my friends and I made a pine needle packaging material made of brown pine needle bits about 1 inch in length and cornstarch paste. We attempted to get its Young's modulus to determine its tensile and compressive strength. This is how we did our experimentation: The packaging material became more solid after drying. One half-sheet was then tested for durability by suspending it between two iron rings positioned 5 inches high, while putting 295-gram weights one by one on the sheet. The sheet remained intact until 4 of the weights (which make up a total of 1180 grams) were placed on it, but began to show damage after 4 tries with the weights. The change in length caused by 4 weights in the first try was 1 cm. I know how terribly flawed our methodology is T__T. What were the errors we did? How can we properly get the material's compressive/tensile strength? I found somewhere that there is a standardized tensile tests, but we don't have the equipment. Please explain to me also the physics principles I need to consider in this problem. Thank you :).